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Zheng G, Wei K, Kang X, Fan W, Ma NL, Verma M, Ng HS, Ge S. A new attempt to control volatile organic compounds (VOCs) pollution - Modification technology of biomass for adsorption of VOCs gas. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 336:122451. [PMID: 37648056 DOI: 10.1016/j.envpol.2023.122451] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 08/15/2023] [Accepted: 08/23/2023] [Indexed: 09/01/2023]
Abstract
The detrimental impact of volatile organic compounds on the surroundings is widely acknowledged, and effective solutions must be sought to mitigate their pollution. Adsorption treatment is a cost-effective, energy-saving, and flexible solution that has gained popularity. Biomass is an inexpensive, naturally porous material with exceptional adsorbent properties. This article examines current research on volatile organic compounds adsorption using biomass, including the composition of these compounds and the physical (van der Waals) and chemical mechanisms (Chemical bonding) by which porous materials adsorb them. Specifically, the strategic modification of the surface chemical functional groups and pore structure is explored to facilitate optimal adsorption, including pyrolysis, activation, heteroatom doping and other methods. It is worth noting that biomass adsorbents are emerging as a highly promising strategy for green treatment of volatile organic compounds pollution in the future. Overall, the findings signify that biomass modification represents a viable and competent approach for eliminating volatile organic compounds from the environment.
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Affiliation(s)
- Guiyang Zheng
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Kexin Wei
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Xuelian Kang
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Wei Fan
- School of Textile Science and Engineering & Key Laboratory of Functional Textile Material and Product of Ministry of Education, Xi'an Polytechnic University, Xi'an, Shanxi 710048, China
| | - Nyuk Ling Ma
- BIOSES Research Interest Group, Faculty of Science & Marine Environment, 21030 Universiti Malaysia Terengganu, Malaysia; Department of Sustainable Engineering, Institute of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, 602105, India
| | - Meenakshi Verma
- University Centre for Research and Development, Department of Chemistry, Chandigarh University, Gharuan, Mohali, Punjab, India
| | - Hui Suan Ng
- Centre for Research and Graduate Studies, University of Cyberjaya, Persiaran Bestari, 63000 Cyberjaya, Selangor, Malaysia
| | - Shengbo Ge
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
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Gan G, Fan S, Li X, Zhang Z, Hao Z. Adsorption and membrane separation for removal and recovery of volatile organic compounds. J Environ Sci (China) 2023; 123:96-115. [PMID: 36522017 DOI: 10.1016/j.jes.2022.02.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 02/02/2022] [Accepted: 02/06/2022] [Indexed: 06/17/2023]
Abstract
Volatile organic compounds (VOCs) are a crucial kind of pollutants in the environment due to their obvious features of severe toxicity, high volatility, and poor degradability. It is particularly urgent to control the emission of VOCs due to the persistent increase of concentration and the stringent regulations. In China, clear directions and requirements for reduction of VOCs have been given in the "national plan on environmental improvement for the 13th Five-Year Plan period". Therefore, the development of efficient technologies for removal and recovery of VOCs is of great significance. Recovery technologies are favored by researchers due to their advantages in both recycling VOCs and reducing carbon emissions. Among them, adsorption and membrane separation processes have been extensively studied due to their remarkable industrial prospects. This overview was to provide an up-to-date progress of adsorption and membrane separation for removal and recovery of VOCs. Firstly, adsorption and membrane separation were found to be the research hotspots through bibliometric analysis. Then, a comprehensive understanding of their mechanisms, factors, and current application statuses was discussed. Finally, the challenges and perspectives in this emerging field were briefly highlighted.
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Affiliation(s)
- Guoqiang Gan
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Shiying Fan
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
| | - Xinyong Li
- State Key Laboratory of Fine Chemicals, Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
| | - Zhongshen Zhang
- National Engineering Laboratory for VOCs Pollution Control Material and Technology, University of Chinese Academy of Sciences, Beijing 101408, China.
| | - Zhengping Hao
- National Engineering Laboratory for VOCs Pollution Control Material and Technology, University of Chinese Academy of Sciences, Beijing 101408, China
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Gopalan J, Buthiyappan A, Raman AAA. Insight into metal-impregnated biomass based activated carbon for enhanced carbon dioxide adsorption: A review. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.06.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Abstract
The thermal catalytic conversion of biomass is currently a prevalent method for producing activated carbon with superb textural properties and excellent adsorption performance. However, activated carbon suffers severely from its poor thermal stability, which can easily result in spontaneous burning. In contrast, silica material is famed for its easy accessibility, high specific surface area, and remarkable thermal stability; however, its broader applications are restricted by its strong hydrophilicity. Based on this, the present review summarizes the recent progress made in carbon-silica composite materials, including the various preparation methods using diverse carbon (including biomass resources) and silica precursors, their corresponding structure–function relationship, and their applications in adsorption, insulation, batteries, and sensors. Through their combination, the drawbacks of the individual materials are circumvented while their original advantages are maintained. Finally, several bottlenecks existing in the field of carbon-silica composites, from synthesis to applications, are discussed in this paper, and possible solutions are given accordingly.
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Altalhi T, El-moemen AA, Ibrahim MM, Mezni A, Alsohaimi IH, Mahmoud MHH, Kumeria T, Mersal GAM, Mostafa NY. Integrated approach in treatment of solid olive residue and olive wastewater. MATERIALS RESEARCH EXPRESS 2021; 8:115503. [DOI: 10.1088/2053-1591/ac34b9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Abstract
Generally olive oil generated two forms of waste by-products: solid olive residue (SOR) and olive wastewater (OWW). In the present study a promising solution is given to treat both SOR and OWW waste by-products. The first process consists of converting the solid olive residue to activated carbon using pyrolysis process at 600 °C, followed by steam activation procedure at three different temperatures. The attained activated carbon was examined by different experimental techniques such as FTIR, SEM, BET and iodine number. The surface area was increased by increasing stream activation temperature (reach 1020 m2 g−1 BET). However, the steam activation at 700 °C was found to be ideal for environmental and economic performance. On the other hand, the activated carbon at 700 °C displayed high removal capacity of both polyphenolic compounds and COD from olive wastewater. In fact, after 2 h of treatment, 95.5% of COD and 84.2% of polyphenolic compounds were completely removed.
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Li Z, Jin Y, Chen T, Tang F, Cai J, Ma J. Trimethylchlorosilane modified activated carbon for the adsorption of VOCs at high humidity. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118659] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Shi J, Han R, Lu S, Liu Q. A metal-OH group modification strategy to prepare highly-hydrophobic MIL-53-Al for efficient acetone capture under humid conditions. J Environ Sci (China) 2021; 107:111-123. [PMID: 34412774 DOI: 10.1016/j.jes.2021.01.030] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 01/23/2021] [Accepted: 01/26/2021] [Indexed: 06/13/2023]
Abstract
A series of highly-hydrophobic MIL-53-Al (MIL = Materials of Institut Lavoisier) frameworks synthesized via decoration of the Al-OH groups by alkyl phosphonic acid were developed as adsorbents for removing acetone from humid gas streams. The newly prepared materials were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscope (SEM), N2 adsorption-desorption and thermogravimetric analysis (TGA). Their adsorption behaviors toward acetone vapor under dry and wet conditions were studied subsequently. Results showed that alkyl phosphonic acid was successfully grafted into MIL-53-Al skeleton through coordinating interaction with Al3+ generating MIL-53-Al@Cx (x = 12, 14, 18). The MIL-53-Al@Cx exhibited similar crystal structure and thermal stability to parent MIL-53-Al. Furthermore, the modified materials showed significantly enhanced hydrophobicity. The water vapor uptake of MIL-53-Al@C14 decreased by 72.55% at 75% relative humidity (RH). Dynamic adsorption experiments demonstrated that water vapor had almost no effect on the acetone adsorption performance of MIL-53-Al@C14. Under the condition of 90% RH, the acetone adsorption capacity of MIL-53-Al@C14 was 102.98% higher than that of MIL-53-Al. Notably, MIL-53-Al@C14 presented excellent adsorption reversibility and regeneration performance in 10 adsorption-desorption cycles. Taken together, the strategy of metal-OH group modification is an attractive way to improve the acetone adsorption performance over metal-organic frameworks (MOFs) under humid conditions. Besides, MIL-53-Al@C14 would be deemed as a promising candidate for capturing acetone in high moisture environment.
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Affiliation(s)
- Jiaqi Shi
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin 300350, China; State Key Laboratory of Engines, Tianjin University, Tianjin 300350, China
| | - Rui Han
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin 300350, China; State Key Laboratory of Engines, Tianjin University, Tianjin 300350, China
| | - Shuangchun Lu
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin 300350, China; State Key Laboratory of Engines, Tianjin University, Tianjin 300350, China
| | - Qingling Liu
- Tianjin Key Lab of Indoor Air Environmental Quality Control, School of Environmental Science and Technology, Tianjin University, Tianjin 300350, China; State Key Laboratory of Engines, Tianjin University, Tianjin 300350, China.
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Son Y, Kim TH, Kim D, Hwang Y. Porous Clay Heterostructure with Alginate Encapsulation for Toluene Removal. NANOMATERIALS 2021; 11:nano11020388. [PMID: 33546398 PMCID: PMC7913573 DOI: 10.3390/nano11020388] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 01/29/2021] [Accepted: 01/29/2021] [Indexed: 11/16/2022]
Abstract
A volatile organic compound adsorbent based on a porous clay heterostructure (PCH) with alginate biopolymer was successfully prepared. From N2 adsorption-desorption analysis, the specific surface area, pore volume, and pore size of bentonite were dramatically increased after introducing the porous structure. Following complexation with alginate (Alg-PCH), the pore volume and pore size were not significantly affected by pore structure. The thermal stability of Alg-PCH shows enhanced thermal stability compared to alginate and alginate beads. The morphology layered structure of Alg-PCH was carried out by transmission electron microscopy (TEM), suggesting the disorder and re-order of the c-axis layer stacking by porous structure and complexation with alginate, respectively, which was well-matched with X-ray diffraction results. To optimize the preparation of Alg-PCH, various reaction conditions (alginate, CaCl2 concentration, bead size, and weight ratio between alginate and PCH) were utilized. According to the toluene adsorption-desorption experiments, the preparation conditions for Alg-PCH were selected as a 2 mm extrusion tip, 0.5% of alginate, and 2% of CaCl2 solution with a 1:50 alginate:PCH weight ratio. Additionally, it shows 61.63 mg/g adsorption capacity with around 49% desorption efficacy under atmospheric temperature and pressure.
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Kim WK, Younis SA, Kim KH. A strategy for the enhancement of trapping efficiency of gaseous benzene on activated carbon (AC) through modification of their surface functionalities. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 270:116239. [PMID: 33341551 DOI: 10.1016/j.envpol.2020.116239] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 11/21/2020] [Accepted: 12/05/2020] [Indexed: 06/12/2023]
Abstract
Facile modification is a common, but effective, option to improve the uptake removal capacity of of activated carbon (AC) against diverse target volatile organic compounds (VOCs; e.g., benzene) in gaseous streams. To help design the routes for such modification, this research built strategies to generate three types of modified ACs by incorporating amine/sulfur/amino-silane groups under solvothermal or microwave (MW) thermal conditions. The adsorption performance has been tested using a total of six types of AC sorbents (three modified + three pristine forms) for the capture of 1 Pa benzene (1 atm and 298 K). The obtained results are evaluated in relation to their textural properties and surface functionalities. Accordingly, the enhancement of AC surface basicity (e.g., point of zero charge (PZC) = 10.25), attained via the silylation process, is accompanied by the reduced adsorption of benzene (a weak base). In contrast, ACs amended with amine/sulfur (electron-donating) groups using the MW technique are found to acquire high surface acidity (PZC of 5.99-6.05) to exhibit significantly improved benzene capturing capability (relative to all others). Their uplifted performance is demonstrated in terms of key performance metrics such as breakthrough volume (BTV10%: 163 → 443 L g-1), adsorption capacity (Q10%: 4.82 → 13.6 mg g-1), and partition coefficient (PC10%: 0.516 → 1.67 mol kg-1 Pa-1). Based on the kinetic analysis, the overall adsorption process is found to be governed by pore diffusion as the main rate-determining step, along with surface interaction mechanisms. The results of this research clearly support the critical role of surface chemistry of AC adsorbents and their textural properties in upgrading air/gas purification systems.
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Affiliation(s)
- Won-Ki Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-Gu, Seoul, 04763, Republic of Korea
| | - Sherif A Younis
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-Gu, Seoul, 04763, Republic of Korea; Analysis and Evaluation Department, Egyptian Petroleum Research Institute, Nasr City, 11727, Cairo, Egypt; Nanobiotechnology Program, Faculty of Nanotechnology for Postgraduate Studies, Cairo University, Sheikh Zayed Branch Campus, Sheikh Zayed City, Giza, PO 12588, Egypt
| | - Ki-Hyun Kim
- Department of Civil and Environmental Engineering, Hanyang University, 222 Wangsimni-ro, Seongdong-Gu, Seoul, 04763, Republic of Korea.
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Zhang W, Xia S, Chen C, He H, Jin Z, Luo M, Chen J. Understanding the crucial roles of catalyst properties in ethyl acetate and toluene oxidation over Pt catalysts. NEW J CHEM 2021. [DOI: 10.1039/d1nj01823j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The catalytic activities of these Pt catalysts for ethyl acetate mainly depend on the oxygen vacancy density, whereas the synergistic catalysis of Pt0 species and oxygen vacancies play important roles in toluene oxidation.
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Affiliation(s)
- Wenxia Zhang
- Jinhua Polytechnic
- Jinhua 321007
- People's Republic of China
| | - Shuang Xia
- Jinhua Polytechnic
- Jinhua 321007
- People's Republic of China
| | - Chonglai Chen
- Jinhua Polytechnic
- Jinhua 321007
- People's Republic of China
| | - Haihua He
- Jinhua Polytechnic
- Jinhua 321007
- People's Republic of China
| | - Zhunian Jin
- Jinhua Polytechnic
- Jinhua 321007
- People's Republic of China
| | - Mengfei Luo
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces
- Institute of Physical Chemistry
- Zhejiang Normal University
- Jinhua 321004
| | - Jian Chen
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces
- Institute of Physical Chemistry
- Zhejiang Normal University
- Jinhua 321004
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11
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Zhang W, An Y, Li S, Liu Z, Chen Z, Ren Y, Wang S, Zhang X, Wang X. Enhanced heavy metal removal from an aqueous environment using an eco-friendly and sustainable adsorbent. Sci Rep 2020; 10:16453. [PMID: 33020581 PMCID: PMC7536411 DOI: 10.1038/s41598-020-73570-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 09/20/2020] [Indexed: 01/07/2023] Open
Abstract
Thiol-lignocellulose sodium bentonite (TLSB) nanocomposites can effectively remove heavy metals from aqueous solutions. TLSB was formed by using -SH group-modified lignocellulose as a raw material, which was intercalated into the interlayers of hierarchical sodium bentonite. Characterization of TLSB was then performed with BET, FTIR, XRD, TGA, PZC, SEM, and TEM analyses. The results indicated that thiol-lignocellulose molecules may have different influences on the physicochemical properties of sodium bentonite, and an intercalated-exfoliated structure was successfully formed. The TLSB nanocomposite was subsequently investigated to validate its adsorption and desorption capacities for the zinc subgroup ions Zn(II), Cd(II) and Hg(II). The optimum adsorption parameters were determined based on the TLSB nanocomposite dosage, concentration of zinc subgroup ions, solution pH, adsorption temperature and adsorption time. The results revealed that the maximum adsorption capacity onto TLSB was 357.29 mg/g for Zn(II), 458.32 mg/g for Cd(II) and 208.12 mg/g for Hg(II). The adsorption kinetics were explained by the pseudo-second-order model, and the adsorption isotherm conformed to the Langmuir model, implying that the dominant chemical adsorption mechanism on TLSB is monolayer coverage. Thermodynamic studies suggested that the adsorption is spontaneous and endothermic. Desorption and regeneration experiments revealed that TLSB could be desorbed with HCl to recover Zn(II) and Cd(II) and with HNO3 to recover Hg(II) after several consecutive adsorption/desorption cycles. The adsorption mechanism was investigated through FTIR, EDX and SEM, which demonstrated that the introduction of thiol groups improved the adsorption capacity. All of these results suggested that TLSB is an eco-friendly and sustainable adsorbent for the extraction of Zn(II), Cd(II) and Hg(II) ions in aqueous media.
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Affiliation(s)
- Wanqi Zhang
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot, China
| | - Yuhong An
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot, China
| | - Shujing Li
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot, China
| | - Zhechen Liu
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot, China
| | - Zhangjing Chen
- Department of Sustainable Biomaterials, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
| | - Yukun Ren
- Bioimaging Research, Sanofi Global R&D, Framingham, MA, USA
| | - Sunguo Wang
- Sungro Bioresource and Bioenergy Technologies Corp, Alberta, Canada
| | - Xiaotao Zhang
- College of Science, Inner Mongolia Agricultural University, Hohhot, China.
- Inner Mongolia Key Laboratory of Sandy Shrubs Fibrosis and Energy Development and Utilization, Hohhot, China.
| | - Ximing Wang
- College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot, China.
- Inner Mongolia Key Laboratory of Sandy Shrubs Fibrosis and Energy Development and Utilization, Hohhot, China.
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Murata K, Ogura K, Ohyama J, Sawabe K, Yamamoto Y, Arai S, Satsuma A. Selective Hydrogenation of Cinnamaldehyde over the Stepped and Plane Surface of Pd Nanoparticles with Controlled Morphologies by CO Chemisorption. ACS APPLIED MATERIALS & INTERFACES 2020; 12:26002-26012. [PMID: 32429665 DOI: 10.1021/acsami.0c05938] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Carbon monoxide (CO) molecules are attracting attention as capping agents that control the structure of metal nanoparticles. In this study, we aimed to control the shape and surface structure of Pd particles by reducing the supported Pd precursor with CO. The reduction of Pd nanoparticles with CO promoted the exposure of step sites and generated spherical and concave-tetrahedral Pd particles on carbon and SiO2 supports. On the other hand, conventional H2-reduced Pd particles show a flattened shape. The preferential exposure of the step sites by the adsorbed CO molecules was supported by the density functional theory-calculated surface energy and the Wulff construction. Morphology- and surface-controlled Pd nanoparticles were used to study the surface structure and morphology effects of Pd nanoparticles on cinnamaldehyde (CAL) hydrogenation. With an increase in the fraction of step sites on Pd nanoparticles, the hydrogenation activity and selectivity of hydrocinnamaldehyde (HCAL) increased. On step sites, the adsorption of the C═C bond of CAL proceeded preferentially, and HCAL was efficiently and selectively generated.
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Affiliation(s)
- Kazumasa Murata
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Keiji Ogura
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Junya Ohyama
- Faculty of Advanced Science and Technology, Kumamoto University, Kumamoto 860-8555, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Kyoichi Sawabe
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Yuta Yamamoto
- Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8603, Japan
| | - Shigeo Arai
- Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8603, Japan
| | - Atsushi Satsuma
- Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
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Preparation of Nano-Porous Carbon-Silica Composites and Its Adsorption Capacity to Volatile Organic Compounds. Processes (Basel) 2020. [DOI: 10.3390/pr8030372] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Carbon-silica composites with nanoporous structures were synthesized for the adsorption of volatile organic compounds (VOCs), taking tetraethyl orthosilicate (TEOS) as the silicon source and activated carbon powder as the carbon source. The preparation conditions were as follows: the pH of the reaction system was 5.5, the hydrophobic modification time was 50 h, and the dosage of activated carbon was 2 wt%. Infrared spectrum analysis showed that the activated carbon was dispersed in the pores of aerogel to form the carbon-silica composites material. The static adsorption experiments, dynamic adsorption-desorption experiments, and regeneration experiments show that the prepared carbon-silica composites have microporous and mesoporous structures, the adsorption capacity for n-hexane is better than that of conventional hydrophobic silica gel, and the desorption performance is better than that of activated carbon. It still has a high retention rate of adsorption capacity after multiple adsorption-desorption cycles. The prepared carbon-silica composites material has good industrial application prospects in oil vapor recovery, providing a new alternative for solving organic waste gas pollution.
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