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Wang HX, Zhao JR, He YT, Xu YH. Preparation of adsorbent from coal gasification slag for the treatment of waste water from lanchar and its adsorption mechanism. ENVIRONMENTAL TECHNOLOGY 2025; 46:2092-2109. [PMID: 39467080 DOI: 10.1080/09593330.2024.2420285] [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: 08/25/2024] [Accepted: 10/12/2024] [Indexed: 10/30/2024]
Abstract
Solid waste coal gasification slag has certain hardness, porosity, pore structure and specific surface area, etc. which can be utilized in environmental protection materials and other areas of high value. Yulin City, high-quality coal resources derived from the excellent quality of charcoal products, but its processing will produce a large number of high chemical oxygen demand (COD), high volatile phenol, high ammonia nitrogen 'three high' wastewater, the ecological environment is very harmful. The results of the modification of the refined coal gasification fine residue showed that the removal rates of the three were enhanced to 91%, 89% and 83%, respectively, after adsorption at a pH of 9.5, an injection ratio of 1:5 and 25 ℃ for 25 min. The reason is that the modification treatment significantly increased the specific surface area of the adsorbent from 103 m2/g to 606 m2/g, which effectively increased the adsorption active sites for the pollutant molecules. The adsorption process of COD from modified refining coal gasification slag for the treatment of charcoal wastewater was thermodynamically investigated. The thermodynamic study shows that the adsorption process of modified refining coal gasification slag on pollutants in the charcoal wastewater is an exothermic and spontaneous process.
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Affiliation(s)
- Huan-Xi Wang
- School of Material Science and Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Jia-Rui Zhao
- New Energy Institute, YuLin University, YuLin, People's Republic of China
| | - Yu-Tong He
- College of Chemistry and Chemical Engineering, YuLin University, YuLin, People's Republic of China
| | - Yun-Hua Xu
- School of Material Science and Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
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Shao J, Wang Y, Che M, Liu Y, Jiang Y, Xiao Q, Demir M, Wang L, Hu X. Sustainable CO 2 Capture: N,S-Codoped Porous Carbons Derived from Petroleum Coke with High Selectivity and Stability. Molecules 2025; 30:426. [PMID: 39860295 PMCID: PMC11767474 DOI: 10.3390/molecules30020426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2025] [Revised: 01/14/2025] [Accepted: 01/16/2025] [Indexed: 01/27/2025] Open
Abstract
CO2 capture from the flue gas is a promising approach to mitigate global warming. However, regulating the carbon-based adsorbent in terms of textural and surface modification is still a challenge. To overcome this issue, the present study depicts the development of cost-effective and high-performance CO2 adsorbents derived from petroleum coke, an industrial by-product, using a two-step process involving thiourea modification and KOH activation. A series of N,S-codoped porous carbons was synthesized by varying activation temperatures and KOH quantity. The optimized sample exhibited a high specific surface area of 1088 m2/g, a narrow micropore volume of 0.52 cm3/g, and considerable heteroatom doping (1.57 at.% nitrogen and 0.19 at.% sulfur). The as-prepared adsorbent achieved a CO2 adsorption capacity of 3.69 and 5.08 mmol/g at 1 bar, 25 °C and 0 °C, respectively, along with a CO2/N2 selectivity of 17. Adsorption kinetics showed 90% of equilibrium uptake was achieved within 5 min, while cyclic studies revealed excellent stability with 97% capacity retention after five cycles. Thermodynamic analysis indicated moderate isosteric heat of adsorption (Qst) values ranging from 18 to 47 kJ/mol, ensuring both strong adsorption and efficient desorption. These findings highlight the potential of petroleum coke-derived porous carbons for sustainable and efficient CO2 capture applications.
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Affiliation(s)
- Jiawei Shao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China; (J.S.); (Y.W.); (M.C.); (Y.L.); (Y.J.)
| | - Yingyi Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China; (J.S.); (Y.W.); (M.C.); (Y.L.); (Y.J.)
| | - Mingyang Che
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China; (J.S.); (Y.W.); (M.C.); (Y.L.); (Y.J.)
| | - Ya Liu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China; (J.S.); (Y.W.); (M.C.); (Y.L.); (Y.J.)
| | - Yongfu Jiang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China; (J.S.); (Y.W.); (M.C.); (Y.L.); (Y.J.)
| | - Qiang Xiao
- Institute of Plant Nutrition, Resources and Environment, Beijing Academy of Agriculture and Forestry Science, Beijing 100097, China
| | - Muslum Demir
- Department of Chemical Engineering, Bogazici University, 34342 Istanbul, Türkiye;
- TUBITAK Marmara Research Center, Material Institute, 41470 Gebze, Türkiye
| | - Linlin Wang
- Key Laboratory of Urban Rail Transit Intelligent Operation and Maintenance Technology and Equipment of Zhejiang Province, College of Engineering, Zhejiang Normal University, Jinhua 321004, China;
| | - Xin Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua 321004, China; (J.S.); (Y.W.); (M.C.); (Y.L.); (Y.J.)
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Li X, Li X, Ma X, Li C, Xue J, Wang S. Highly efficient CO 2 mineralization: Mechanisms and feasibility of utilizing electrolytic manganese residue as a feedstock and implementing ammonia recycling. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 954:176711. [PMID: 39366566 DOI: 10.1016/j.scitotenv.2024.176711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2024] [Revised: 09/04/2024] [Accepted: 10/01/2024] [Indexed: 10/06/2024]
Abstract
Electrolytic manganese residue (EMR) and CO2 emissions from the electrolytic manganese metal (EMM) production process present significant challenges to achieving cleaner production within the industry. Given the high capacity for CO2 sequestration and the stability of the sequestered forms, CO2 mineralization methods utilizing minerals or industrial residues have garnered considerable research interest. The efficacy of such methods is fundamentally dependent on the properties of the materials employed. EMR, due to its calcium sulfate dihydrate (CaSO4·2H2O) content, possesses an intrinsic potential for CO2 solidification. In this study, we propose a novel method for CO2 mineralization utilizing EMR, coupled with NH3·H2O recycling. Experimental results indicated that under conditions of a reaction temperature of 55 °C and a pH of approximately 8, each ton of EMR can sequester 0.16 t of CO2, with equilibrium achieved within 10 min. The mineralization mechanism was elucidated using SEM, TG curves, and XRD analyses, which revealed that Ca2+ ions are initially leached from CaSO4·2H2O in the EMR, subsequently precipitating with CO32- ions to form CaCO3. This CaCO3 layer effectively covers the surface of CaSO4·2H2O, inhibiting further Ca2+ release and stabilizing the reaction equilibrium. Furthermore, the ammonia in the solution is regenerated into NH3·H2O, facilitating its reuse and preventing secondary pollution. The utilization of EMR for CO2 mineralization not only mitigates carbon emissions in the EMM production process but also promotes environmentally sustainable practices in the industry. This study highlights a promising pathway towards achieving carbon neutrality and cleaner production in electrolytic manganese production.
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Affiliation(s)
- Xintong Li
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, PR China; Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, PR China
| | - Xiaoya Li
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, PR China; Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, PR China
| | - Xin Ma
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, PR China; Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, PR China
| | - Changxin Li
- College of Safety Science and Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, PR China.
| | - Jianrong Xue
- College of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, PR China
| | - Shuai Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, PR China; Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese Resources, Central South University, Changsha 410083, PR China.
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Niu Y, Zhang Q, Wang L, Guo F, Zhang Y, Wu J. Synthesis of Fe-N doped porous carbon/silicate composites regulated by minerals in coal gasification fine slag for synergistic electrocatalytic treatment of phenolic wastewater. ENVIRONMENTAL RESEARCH 2024; 251:118643. [PMID: 38458590 DOI: 10.1016/j.envres.2024.118643] [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: 01/01/2024] [Revised: 02/08/2024] [Accepted: 03/05/2024] [Indexed: 03/10/2024]
Abstract
Coal gasification fine slag (CGFS), as a difficult-to-dispose solid waste in the coal chemical industry, consists of minerals and residual carbon. Due to the aggregate structure of minerals blocking pores and encapsulating active substances, the high-value utilization of CGFS still remains a challenge. Based on the intrinsic characteristics of CGFS, this study synthesized Fe-N doped porous carbon/silicate composites (Fe-NC) by alkali activation and pyrolysis for electrocatalytic degradation of phenolic wastewater. Meanwhile, minerals were utilized to regulate the surface chemical and pore structure, turning their disadvantages into advantages, which caused a sharp increase in m-cresol mineralization. The positive effect of minerals on composite properties was investigated by characterization techniques, electrochemical analyses and density functional theory (DFT) calculations. It was found that the mesoporous structure of the mineral-regulated composites was further developed, with more carbon defects and reactive substances on its surface. Most importantly, silicate mediated iron conversion through strong interaction with H2O2, high work function gradient with electroactive iron, and excellent superoxide radical (•O2-) production capacity. It effectively improved the reversibility and kinetics of the entire electrocatalytic reaction. Within the Fe-NC311 electrocatalytic system, the m-cresol removal rate reached 99.55 ± 1.24%, surpassing most reported Fe-N-doped electrocatalysts. In addition, the adsorption and electrooxidation experiment confirmed that the synergistic effect of Fe-N doped porous carbon and silicate simultaneously promoted the capture of pollutants and the transformation of electroactive molecules, and hence effectively shortened the diffusion path of short-lived radicals, which was further supported by molecular dynamics simulation. Therefore, this research provides new insights into the problem of mineral limitations and opens an innovative approach for CGFS recycling and environmental remediation.
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Affiliation(s)
- Yanjie Niu
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, PR China
| | - Qiqi Zhang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, PR China
| | - Li Wang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, PR China
| | - Fanhui Guo
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, PR China
| | - Yixin Zhang
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou, 221116, PR China
| | - Jianjun Wu
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, PR China.
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Sun C, Pan H, Shen T, Sun J, He S, Li T, Lu X. The adsorption properties and mechanisms of magnetic carbon-silicon composites in situ prepared from coal gasification fine slag. RSC Adv 2024; 14:4890-4903. [PMID: 38323013 PMCID: PMC10845903 DOI: 10.1039/d3ra05916b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 01/22/2024] [Indexed: 02/08/2024] Open
Abstract
A novel magnetic carbon-silicon composite (Fe-HH-CGFS) was prepared from solid waste coal gasification fine slag (CGFS) by a two-step acid leaching and one-step chemical co-precipitation process, which was optimized using a 3-factor, 3-level Box-Behnken design and then analyzed for correlation. Fe-HH-CGFS was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET), thermal gravimetric analysis (TGA), and vibrating sample magnetometer (VSM) measurements. The results demonstrated that Fe-HH-CGFS had a reverse spinel structure with an average particle size of 5.14 nm, exhibiting a microporous/mesoporous structure with a specific surface area (SSA) of 196.84 m2 g-1 and pore volume of 0.346 cm3 g-1. Furthermore, Fe-HH-CGFS could achieve 97.59% removal efficiency of rhodamine B (RhB) under the optimal conditions: an initial concentration of RhB of 100 mg L-1, an adsorption time of 60 min, and a dosage of Fe-HH-CGFS of 1.0 g L-1. The pseudo-second-order model and the Langmuir isotherm satisfactorily described the adsorption behavior. The results indicated that the RhB removal process was a single-molecule layer endothermic adsorption, which is dominated by chemical adsorption reactions. This work is expected to provide an alternative route for the high-value utilization of CGFS and offer a valuable insight for the recycling of other solid wastes, aligning with the green development concept of "treating wastes with wastes".
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Affiliation(s)
- Chenxu Sun
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Haoqi Pan
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Tingting Shen
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Jing Sun
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Shaocang He
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Tianpeng Li
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
| | - Xuqian Lu
- School of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences) Jinan 250353 P. R. China
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Recent advances and conceptualizations in process intensification of coal gasification fine slag flotation. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2022.122394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Processing of coal gasification fine slag by different physical separation methods: Fate of typical heavy metals and comparison analysis on products. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122675] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Lu T, Bai J, Demir M, Hu X, Huang J, Wang L. Synthesis of potassium Bitartrate-derived porous carbon via a facile and Self-Activating strategy for CO2 adsorption application. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121368] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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