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Madhu GS, Rajakumar B. A combined experimental and computational investigation on the OH radical and Cl atom-initiated reaction of 2,3-dichloropropene in troposphere. CHEMOSPHERE 2024; 362:142566. [PMID: 38851505 DOI: 10.1016/j.chemosphere.2024.142566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 06/03/2024] [Accepted: 06/06/2024] [Indexed: 06/10/2024]
Abstract
Temperature-dependent kinetics of OH radical and Cl atom-initiated reaction of an important halogenated alkene, 2,3-Dichloropropene (23DCP), were investigated using absolute and relative methods over 278-363 K. Pulsed laser photolysis - laser induced fluorescence technique and relative rate method using gas chromatography with flame ionization detector were employed for studying the kinetics of 23DCP with OH radical and Cl atom, respectively. The obtained Arrhenius expressions were kOH(expt)=(4.08 ± 1.63) × 10-13exp{(1043 ± 124)/T} cm3 molecule-1 s-1 and kCl(expt)=(1.54 ± 0.24) × 10-11exp{(705 ± 48)/T} cm3 molecule-1 s-1. Computational calculations were conducted to validate our experimental kinetic results and provide new insights into the importance of a particular pathway among all based on thermodynamic parameters. The addition of OH/Cl to the terminal carbon of the double bond present in 23DCP proved to be the predominant pathway across the selected temperature range for the present study (200-400 K). The degradation mechanism of these reactions was proposed by analyzing the products with the aid of gas chromatography with mass spectrometry. Calculating various atmospheric implication parameters can help to understand how the release of 23DCP may affect the troposphere.
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Affiliation(s)
- Gopika S Madhu
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
| | - Balla Rajakumar
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India; Centre for Atmospheric and Climate Sciences, Indian Institute of Technology Madras, Chennai, 600036, India.
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2
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Rais N, Salta Z, Tasinato N. Theoretical investigation of the OH-initiated atmospheric degradation mechanism of CX 2CHX (X = H, F, Cl) by advanced quantum chemical and transition state theory methods. Phys Chem Chem Phys 2024; 26:19976-19991. [PMID: 38995148 DOI: 10.1039/d4cp01453g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/13/2024]
Abstract
Halogenated olefins are anthropogenic compounds with many industrial applications but at the same time raising many environmental and health concerns. Gas-phase electrophilic addition of the OH radical to the olefinic CC bond represents the primary sink for these chemicals in the atmosphere, with the degree and type of halogenation playing a significant role in their overall reactivity. In this work, we present a theoretical investigation of the reaction mechanisms and kinetics for the reactions between the OH radical and CH2CH2 (ethylene, ETH), CF2CHF (trifluoroethylene, TFE) and CCl2CHCl (trichloroethylene, TCE), simulated by state-of-the-art protocols and methods, with the aim of providing a detailed interpretation of the available experimental results, as well as new data of relevance to tropospheric chemistry. Specifically, potential energy surfaces (PESs) are obtained using the jun-Cheap (jChS) composite scheme, whereas temperature and pressure dependent rate coefficients and product distributions in the 100-600 K temperature range are calculated within the Rice-Ramsperger-Kassel-Marcus/master equation (RRKM/ME) framework. The rates for barrierless channels are obtained from variable reaction coordinate-variational transition state theory (VRC-VTST) combined with the two transition state model. While the reactions with ETH and TFE proceed mainly via the formation of addition adducts at P = 1 atm and T = 298 K, the dominant channel for TCE is the Cl-elimination reaction. Global rate constants for the two halogenated olefins, TFE and TCE, are found to be pressure-independent, contrary to the case of ETH. The computed rate constants, as well as their temperature and pressure dependence, are in remarkable agreement with the available experimental data, and they are used to derive atmospheric lifetimes (τ) for both TFE and TCE as a function of altitude (h) in the atmosphere, by taking into account variations in the rate coefficients (k (T, P)) and [OH] concentration.
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Affiliation(s)
- Nadjib Rais
- Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126, Pisa, Italy.
- IUSS Scuola Universitaria Superiore, Piazza della Vittoria 15, I-27100, Pavia, Italy
| | - Zoi Salta
- Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126, Pisa, Italy.
| | - Nicola Tasinato
- Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126, Pisa, Italy.
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3
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Messaoudi B. Quantum chemical study of the reaction of trichloroethylene with O(
3
P). INT J CHEM KINET 2020. [DOI: 10.1002/kin.21372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Boulanouar Messaoudi
- Laboratoire de Thermodynamique Appliquée et Modélisation MoléculaireDépartement de Chimie, Faculté des SciencesUniversité Abou Bekr Belkaid Tlemcen Algeria
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4
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Tabernacka A, Zborowska E, Pogoda K, Żołądek M. Removal of tetrachloroethene from polluted air by activated sludge. ENVIRONMENTAL TECHNOLOGY 2019; 40:470-479. [PMID: 29098945 DOI: 10.1080/09593330.2017.1397759] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 10/22/2017] [Indexed: 06/07/2023]
Abstract
A one-step technological system containing activated sludge fed with synthetic domestic wastewater was applied to treat waste air polluted with tetrachloroethene (PCE). In the first stage of the experiment, air passed through a bioscrubber; in the second and third stages, it passed through the bioreactor containing activated sludge and bacteria immobilised in oak chips. These bacteria are active in PCE biodegradation. Process efficiency in the final stage of the experiment was high; the elimination capacity was 0.23 g m-3 h-1 with the PCE mass loading rate of 0.58 g m-3 h-1. It has been shown that in the activated sludge bioreactor, bacteria adapted to PCE biodegradation and the wood chips protected microorganisms from the toxic effects of pollution. The dominant strains of bacteria immobilised in wood chips have been identified. Most of them were Gram-negative rods - Pseudomonas aeruginosa, Pseudomonas putida, Ralstonia pickettii and Ochrobactrum anthropii. Only one strain was Gram-positive and of cylindrical shape. The results of the study indicate the potential of immobilised bacteria capable of degrading chlorinated aliphatic hydrocarbons for the air and wastewater treatment. The low cost of the treatment process is an advantage.
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Affiliation(s)
- Agnieszka Tabernacka
- a Biology Division, Faculty of Building Services, Hydro and Environmental Engineering , Warsaw University of Technology , Warsaw , Poland
| | - Ewa Zborowska
- a Biology Division, Faculty of Building Services, Hydro and Environmental Engineering , Warsaw University of Technology , Warsaw , Poland
| | - Katarzyna Pogoda
- a Biology Division, Faculty of Building Services, Hydro and Environmental Engineering , Warsaw University of Technology , Warsaw , Poland
| | - Marcin Żołądek
- a Biology Division, Faculty of Building Services, Hydro and Environmental Engineering , Warsaw University of Technology , Warsaw , Poland
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5
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Abstract
Photooxidation of tetrachloroethylene (PERC) and trichloroethylene (TCE) in simulated tropospheric smog chamber studies occurs with a time delay, accelerating simultaneous decreasing O3/chlorinated ethylene (CE) concentrations along with increasing CCl2O, which is attributed to CCl2 in the case of PERC and CCl2 or CHCl for TCE. The carbenes, chlorinated acetyl chlorides and CCl2O products may result from the rearrangement of the oxidised and/or excited oxidised CE, e.g. an epoxide. Analyses indicate scavenging experiments have not proved the existence of Cl atoms as being responsible for chlorinated acetyl chloride formation. Halocarbenes may form complexes with O3 which can undergo electron transfer (ET) and lead to dissociation of O3 to O2 and O and regeneration of carbene, resulting in a chain reaction. The direction of ET may be determined by the smallest differential HOMO–LUMO energy between the carbene and O3 which results in greater transition state stabilisation. Similarities in the reactions of O3 with carbenes and simple alkenes, nucleophilic carbenes with electron-poor alkenes and electrophilic carbene PhCCl with alkyl-substituted alkenes, i.e. (1) complex formation, (2) very low or negative activation energies and (3) the ability to undergo ET reactions with alkylalkenes are discussed. The possibility of the world-wide used perhalocarbons, e.g. perfluorinated carbons, hydroperhalocarbons, their halogenated replacements and starting materials degrading to halocarbenes which may degrade O3, is analysed.
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Affiliation(s)
- Andrew Mamantov
- Formerly of: US Environmental Protection Agency, Washington, DC, USA
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6
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Tabernacka A, Zborowska E, Lebkowska M, Borawski M. Air purification from TCE and PCE contamination in a hybrid bioreactors and biofilter integrated system. JOURNAL OF HAZARDOUS MATERIALS 2014; 264:363-369. [PMID: 24316808 DOI: 10.1016/j.jhazmat.2013.11.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 09/20/2013] [Accepted: 11/05/2013] [Indexed: 06/02/2023]
Abstract
A two-stage waste air treatment system, consisting of hybrid bioreactors (modified bioscrubbers) and a biofilter, was used to treat waste air containing chlorinated ethenes - trichloroethylene (TCE) and tetrachloroethylene (PCE). The bioreactor was operated with loadings in the range 0.46-5.50gm(-3)h(-1) for TCE and 2.16-9.02gm(-3)h(-1) for PCE. The biofilter loadings were in the range 0.1-0.97gm(-3)h(-1) for TCE and 0.2-2.12gm(-3)h(-1) for PCE. Under low pollutant loadings, the efficiency of TCE elimination was 23-25% in the bioreactor and 54-70% in the biofilter. The efficiency of PCE elimination was 44-60% in the bioreactor and 50-75% in the biofilter. The best results for the bioreactor were observed one week after the pollutant loading was increased. However, the process did not stabilize. In the next seven days contaminant removal efficiency, enzymatic activity and biomass content were all diminished.
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Affiliation(s)
- Agnieszka Tabernacka
- Warsaw University of Technology, Faculty of Environmental Engineering, Biology Division, Nowowiejska 20, 00-653 Warsaw, Poland.
| | - Ewa Zborowska
- Warsaw University of Technology, Faculty of Environmental Engineering, Biology Division, Nowowiejska 20, 00-653 Warsaw, Poland
| | - Maria Lebkowska
- Warsaw University of Technology, Faculty of Environmental Engineering, Biology Division, Nowowiejska 20, 00-653 Warsaw, Poland
| | - Maciej Borawski
- AstraZeneca Pharma Poland Sp. z o.o., Postępu 18, 02-676 Warsaw, Poland
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7
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Tabernacka A, Zborowska E. Trichloroethylene and tetrachloroethylene elimination from the air by means of a hybrid bioreactor with immobilized biomass. J Biosci Bioeng 2012; 114:318-24. [DOI: 10.1016/j.jbiosc.2012.04.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Revised: 03/12/2012] [Accepted: 04/23/2012] [Indexed: 11/17/2022]
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8
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Christiansen CJ, Francisco JS. Atmospheric Oxidation of Trichloroethylene: An Ab Initio Study. J Phys Chem A 2010; 114:9163-76. [PMID: 20687539 DOI: 10.1021/jp103769z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Carrie J. Christiansen
- Department of Chemistry and Department of Earth and Atmospheric Sciences Purdue University, West Lafayette, Indiana 47909
| | - Joseph S. Francisco
- Department of Chemistry and Department of Earth and Atmospheric Sciences Purdue University, West Lafayette, Indiana 47909
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9
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Yamazaki‐Nishida S, Read HW, Nagano JK, Jarosch T, Eddy C, Cervera‐March S, Anderson MA. Gas phase photocatalytic degradation on TIO2 pellets of volatile chlorinated organic compounds from a soil vapor extraction well. ACTA ACUST UNITED AC 2008. [DOI: 10.1080/15320389409383476] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Suzuko Yamazaki‐Nishida
- a Water Science and Engineering Laboratory, Water Chemistry Program , University of Wisconsin‐Madison , Madison, Wl, 53706
| | - Harry W. Read
- a Water Science and Engineering Laboratory, Water Chemistry Program , University of Wisconsin‐Madison , Madison, Wl, 53706
| | - Joyce K. Nagano
- a Water Science and Engineering Laboratory, Water Chemistry Program , University of Wisconsin‐Madison , Madison, Wl, 53706
| | - Tim Jarosch
- b Savannah River Technology Center, Environmental Sciences Section , Westinghouse Savannah River Company , Aiken, SC, 29808
| | - Carol Eddy
- b Savannah River Technology Center, Environmental Sciences Section , Westinghouse Savannah River Company , Aiken, SC, 29808
| | - Salvador Cervera‐March
- c Department of Chemical Engineering , University of Barcelona , Marti i Franques, 1, Barcelona, 08028, Spain
| | - Marc A. Anderson
- a Water Science and Engineering Laboratory, Water Chemistry Program , University of Wisconsin‐Madison , Madison, Wl, 53706
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10
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Ohsaka T, Shinozaki K, Tsuruta K, Hirano K. Photo-electrochemical degradation of some chlorinated organic compounds on n-TiO2 electrode. CHEMOSPHERE 2008; 73:1279-1283. [PMID: 18718634 DOI: 10.1016/j.chemosphere.2008.07.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 07/05/2008] [Accepted: 07/08/2008] [Indexed: 05/26/2023]
Abstract
The electrolysis of some chlorinated organic compounds such as chloroacetic acids, chloromethanes and chloroethenes were carried out on a photo-irradiated n-TiO(2) electrode applied a constant potential, 1.0 V vs. Ag/AgCl, and the alternated pulse potentials of +1.0 V and various negative potentials, -1.0, -1.2 and -1.4V vs. Ag/AgCl in 0.1 mol dm(-3) Na(2)SO(4) solutions saturated with oxygen or with nitrogen. These compounds were degraded on the n-TiO(2) electrode by the photo-electrolysis and mineralized to carbon dioxide, carbon monoxide and chloride ion. When the alternated pulse potentials were applied, the mineralization yields were increased for these compounds, especially for trichloroacetic acid and carbon tetrachloride, both of which were comparatively stable to the degradation in the constant potential electrolysis. The presence of oxygen in the solution was effective for the mineralization of these compounds, while little effective for that of trichloroacetic acid and of carbon tetrachloride.
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Affiliation(s)
- Takashi Ohsaka
- Department of Applied Chemistry, Faculty of Engineering, Shibaura Institute of Technology, 3-7-5, Toyosu, Koto-ku, Tokyo 135-8548, Japan.
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11
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Olbert-Majkut A, Mielke Z. Reactions of OH and NO radicals with 1,1-dichloroethylene in argon matrices. FTIR and theoretical studies. Phys Chem Chem Phys 2006; 8:4773-82. [PMID: 17043721 DOI: 10.1039/b605677f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
HONO/1,1-dichloroethylene/Ar matrices were subjected to UV radiation (lambda > 340 nm) from a medium pressure mercury lamp. The products of the photolysis were studied experimentally by means of FTIR spectroscopy and theoretically using the ab initio MP2 method. Two conformers of 2-nitroso-2,2-dichloroethanol molecule have been identified as the final products of the double addition reaction of the OH, NO radicals to 1,1-dichloroethylene. The additional reactive species observed in the matrix is tentatively identified as an 1,1-dichloro-2-hydroxyethyl radical, an intermediate formed by single addition of OH to 1,1-dichloroethylene. The three photoproducts have been identified and observed for the first time. The identities of the products have been justified by comparison with the experiments with deuterated DONO and by performing concentration and annealing studies as well as by reference to the spectral data of related molecules. The results of the quantum mechanical calculations confirmed both the assignment of the new molecules and mechanism of the reaction observed in our experiment.
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Affiliation(s)
- Adriana Olbert-Majkut
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland.
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12
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Hirano K, Nitta H, Sawada K. Effect of sonication on the photo-catalytic mineralization of some chlorinated organic compounds. ULTRASONICS SONOCHEMISTRY 2005; 12:271-276. [PMID: 15501709 DOI: 10.1016/j.ultsonch.2004.01.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2003] [Revised: 11/24/2003] [Accepted: 01/06/2004] [Indexed: 05/24/2023]
Abstract
Effects of the irradiation of ultrasound (US) on the photo-catalytic mineralization of some chlorinated organic compounds such as dichloroethane, tri- and tetrachloroethylenes, chloroacetic acids and chloromethanes were examined in oxygen saturated aqueous solutions suspended titanium dioxide (P25) particles. The yields of the sonochemical mineralization for these compounds were found to be extremely low compared to the photo-catalysis. However, the pre-sonication, US irradiation on the sample solution before the photo-irradiation, enhanced significantly the following photo-catalytic degradation to the complete oxidation. The effect was investigated in detail and it was found that the effect was mainly owing to the increase in the capability of the catalysis of which particles were sparsely dispersed by the sonication. The other contribution of the pre-sonication effect was found to be "pre-sonolysis", the initial formation of some intermediated products sonochemically, which are oxidizable more rapidly further to carbon dioxide than the original compound by the following photo-catalytic reactions. The pre-sonolysis effect was observed remarkably for trichloroacetic acid and tetrachloromethane, both of which are known to be hardly reactive to the photo-catalytic degradation. The photo-catalytic degradation with simultaneous sonication were also carried out for these compounds. The synergetic effect in the mineralization was observed both for carbontetrachloride and for trichloroacetic acid, the higher carbon dioxide yield being obtained in the simultaneous reaction than the sum of the yields in the photo-catalysis and the sonolysis each alone, while no significant synergetic effect was observed in the mineralization of other compounds.
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Affiliation(s)
- Katsuhiko Hirano
- Department of Applied Chemistry, Shibaura Institute of Technology, 3-9-14, Shibaura, Minato-ku, Tokyo 108-8548, Japan.
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13
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Yamazaki S, Tanimura T, Yoshida A, Hori K. Reaction Mechanism of Photocatalytic Degradation of Chlorinated Ethylenes on Porous TiO2 Pellets: Cl Radical-Initiated Mechanism. J Phys Chem A 2004. [DOI: 10.1021/jp0311310] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Suzuko Yamazaki
- Department of Chemistry, Faculty of Science, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Toshifumi Tanimura
- Department of Chemistry, Faculty of Science, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Atsushi Yoshida
- Department of Chemistry, Faculty of Science, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Kenzi Hori
- Department of Applied Chemistry and Chemical Engineering, Faculty of Engineering, Yamaguchi University, Ube 755-8611, Japan
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14
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Cool TA, Nakajima K, Mostefaoui TA, Qi F, McIlroy A, Westmoreland PR, Law ME, Poisson L, Peterka DS, Ahmed M. Selective detection of isomers with photoionization mass spectrometry for studies of hydrocarbon flame chemistry. J Chem Phys 2003. [DOI: 10.1063/1.1611173] [Citation(s) in RCA: 230] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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15
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YAMAZAKI S, ARAKI K. Photocatalytic Degradation of Tri- and Tetrachloroethylene on Porous TiO 2 Pellets. ELECTROCHEMISTRY 2002. [DOI: 10.5796/electrochemistry.70.412] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Suzuko YAMAZAKI
- Department of Chemistry, Faculty of Science, Yamaguchi University
| | - Kensuke ARAKI
- Department of Chemistry, Faculty of Science, Yamaguchi University
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16
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Wu YPG, Lin YF. High temperature oxidation of C2Cl4/CH4 mixtures. JOURNAL OF HAZARDOUS MATERIALS 2002; 91:239-256. [PMID: 11900916 DOI: 10.1016/s0304-3894(01)00393-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Experiments on high temperature oxidation of multi-chlorinated hydrocarbons, tetrachloroethylene (C2Cl4), with hydrocarbon fuels, CH4, were performed in a 15 mm i.d. tubular flow reactor. Temperatures ranged from 700 to 850 degrees C, with the average residence time in the range from 0.3 to 1.5s. Three equivalence ratios, phi=0.87 (fuel-lean (FL)), phi=1 (stoichiometry (S)), and phi=1.3 (fuel-rich (FR)), were studied. The global Arrhenius equations for the decomposition of C(2)Cl(4) for each reactant set ratio are: k(lean)=5.77 x 10(15) exp(-30447/RT), k(stoi)=5.15 x 10(15) exp(-30421/RT), and k(rich)=6.32 x 10(14) exp(-28879/RT). The important reactions for destruction of parent C2Cl4 include: C2Cl4 --> C2Cl3 + Cl, C2Cl4 + H--> C2Cl3 + HCl and C2Cl4 + H --> C2HCl3 + Cl. The resulting reactant loss, and intermediate and final product profiles were determined. C2HCl3, C2Cl2, CO, CO2 and HCl are the major products for the reaction of C2Cl4/CH4/O2 mixtures for these three reaction systems. Minor intermediates include C2H3Cl, C2HCl, COCl2, CH3CHCl2, C2H4, C2H6, CCl2CHCH3 , trans-CHClCHCl, cis-CHClCHCl, trans-ClHC=CClCH(3), C6H6, and Cl2. The experimental data showed that as the oxygen concentration increased, the temperature needed to detect the resulting products decreased.
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Affiliation(s)
- Yo ping G Wu
- Department of Chemical Engineering, National I-Lan Institute of Technology, I-Lan 26041, Taiwan, ROC
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17
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ZHAO LH, OZAKI S, ITOH K, MURABAYASHI M. Effect of Phosgene in Gas-Phase Photocatalytic Oxidation Reaction of Trichloroethylene Using TiO 2. ELECTROCHEMISTRY 2002. [DOI: 10.5796/electrochemistry.70.171] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Lian-hua ZHAO
- Institute of Environmental Science and Technology, Yokohama National University
- Department of Chemistry, Yan Bian University
| | - Shigeko OZAKI
- Institute of Environmental Science and Technology, Yokohama National University
| | - Kiminori ITOH
- Institute of Environmental Science and Technology, Yokohama National University
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18
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ZHAO LH, OZAKI S, ITOH K, MURABAYASHI M. Self-Catalytic Behavior in Gas-Phase Photocatalytic Oxidation of Trichloroethylene Using TiO 2. ELECTROCHEMISTRY 2002. [DOI: 10.5796/electrochemistry.70.8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Lian-hua ZHAO
- Graduate School of Environment and Information Sciences, Yokohama National University
- Department of Chemistry, Yan Bian University
| | - Shigeko OZAKI
- Graduate School of Environment and Information Sciences, Yokohama National University
| | - Kiminori ITOH
- Graduate School of Environment and Information Sciences, Yokohama National University
| | - Masayuki MURABAYASHI
- Graduate School of Environment and Information Sciences, Yokohama National University
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19
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Yamada T, El-Sinawi A, Siraj M, Taylor PH, Peng J, Hu X, Marshall P. Rate Coefficients and Mechanistic Analysis for the Reaction of Hydroxyl Radicals with 1,1-Dichloroethylene and trans-1,2-Dichloroethylene over an Extended Temperature Range. J Phys Chem A 2001. [DOI: 10.1021/jp0109067] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Tichenor LB, El-Sinawi A, Yamada T, Taylor PH, Peng J, Hu X, Marshall P. Kinetic studies of the reaction of hydroxyl radicals with trichloroethylene and tetrachloroethylene. CHEMOSPHERE 2001; 42:571-577. [PMID: 11219681 DOI: 10.1016/s0045-6535(00)00229-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Rate coefficients are reported for the gas-phase reaction of the hydroxyl radical (OH) with C2HCl3 (k(1)) and C2Cl4 (k2) over an extended temperature range at 740+/-10 Torr in a He bath gas. These absolute rate measurements were accomplished using a laser photolysis/laser-induced fluorescence (LP/LIF) technique under slow flow conditions. The simple Arrhenius equation adequately describes the low temperature data for k1 (<650 K) and the entire data set for k2 and is given by (in units of cm3 molecule(-1) s(-1)): k1(291 - 650 K) = (9.73+/-1.15) x 10(-13) exp (158.7+/-44.0)/T, k2(293 - 720 K ) = (1.53+/-0.14) x 10(-12) exp (-688.2+/-67.5)/T. Error limits are 2sigma values. The room temperature values for k1 and k2 are within +/-2sigma of previous data using different techniques. The Arrhenius activation energies for k1 and k2 are a factor of 2-3 lower than previously reported values. The experimental measurements for both k1 and k2 in conjunction with transition state and variation transition state theory calculations infer an OH addition mechanism. The lack of a measurable kinetic isotope effect for k1 is consistent with this mechanism. Insight into the subsequent reactions of the chemically activated intermediate are presented in the form of potential energy diagrams derived from ab initio calculations.
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Affiliation(s)
- L B Tichenor
- Environmental Sciences and Engineering Group, University of Dayton Research Institute, OH 43469-0132, USA
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Tichenor LB, Graham JL, Yamada T, Taylor PH, Peng J, Hu X, Marshall P. Kinetic and Modeling Studies of the Reaction of Hydroxyl Radicals with Tetrachloroethylene. J Phys Chem A 2000. [DOI: 10.1021/jp993203m] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Yamazaki S, Tanaka S, Tsukamoto H. Kinetic studies of oxidation of ethylene over a TiO2 photocatalyst. J Photochem Photobiol A Chem 1999. [DOI: 10.1016/s1010-6030(98)00448-1] [Citation(s) in RCA: 125] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Czarnowski J. Kinetics and Mechanism of the Thermal Gas-Phase Oxidation of Tetrachloroethene by Molecular Oxygen in Presence of Trifluoromethylhypofluorite, CF3OF. Z PHYS CHEM 1998. [DOI: 10.1524/zpch.1998.203.part_1_2.183] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Yamazaki-Nishida S, Fu X, Anderson MA, Hori K. Chlorinated byproducts from the photoassisted catalytic oxidation of trichloroethylene and tetrachloroethylene in the gas phase using porous TiO2 pellets. J Photochem Photobiol A Chem 1996. [DOI: 10.1016/1010-6030(96)04320-1] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Nicovich JM, Wang S, McKee ML, Wine PH. Kinetics and Thermochemistry of the Cl(2PJ) + C2Cl4 Association Reaction. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp952396k] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- J. M. Nicovich
- Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia 30332
| | - S. Wang
- Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia 30332
| | - M. L. McKee
- Department of Chemistry, Auburn University, Auburn, Alabama 36849
| | - P. H. Wine
- School of Chemistry and Biochemistry, School of Earth and Atmospheric Sciences, and Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia 30332
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Czarnowski J. Kinetics and Mechanism of the Thermal Gas-phase Oxidation of Trichloroethene by Molecular Oxygen in Presence of Trifluoromethylhypofluorite, CF3OF. Z PHYS CHEM 1995. [DOI: 10.1524/zpch.1995.191.part_1.103] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Zabel F, Kirchner F, Becker KH. Thermal Decomposition of CF3C(O)O2NO2, CClF2C(O)O2NO2, CCl2FC(O)O2NO2, and CCl3C(O)O2NO2. INT J CHEM KINET 1994. [DOI: 10.1002/kin.550260805] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Roberts JM, Bertman SB. The thermal decomposition of peroxyacetic nitric anhydride (PAN) and peroxymethacrylic nitric anhydride (MPAN). INT J CHEM KINET 1992. [DOI: 10.1002/kin.550240307] [Citation(s) in RCA: 88] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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