1
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Zhang G, Zheng Y, Dong YZ. Pilot-Scale Experimental Study on the Coupling of Venturi-Bubbling Reactor to Promote the Absorption of Leaked H 2S. ACS OMEGA 2024; 9:21260-21269. [PMID: 38764628 PMCID: PMC11097158 DOI: 10.1021/acsomega.4c01346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2024] [Revised: 04/01/2024] [Accepted: 04/22/2024] [Indexed: 05/21/2024]
Abstract
Natural gas generates varying concentrations of H2S during natural formation and extraction, and H2S leak accidents are frequent, posing a significant threat to the safety of human life and the environment. Conventional treatment technology equipment is large and does not meet the emergency requirements of the complex topographical gas field. This study aimed to design a pilot-scale method coupling the venturi and bubbling reactors to reduce equipment size and improve emergency capabilities for the absorption of leaked H2S. It found that the ring system self-priming venturi reactor, which was suitable only for the coarse treatment of toxic gases, maintained an absorption efficiency of around 50% under most operating conditions, with substantial variations due to changes in process parameters, but that redundancy of the bubbling reactor was high. With the synergistic effect of venturi and bubbling, the coupling process had an extremely high absorption efficiency, basically more than 95%. The experiments also showed that the H2S concentration at the outlet of the venturi-bubbling reactor increased with increasing inlet gas concentration and gas volume. The absorption performance improved significantly on increasing Fe3+ concentration; it increased first and then remained constant, and the optimum Fe3+ concentration for the absorption of leaked H2S was 21 000 mg/m3. The absorption performance decreased with increasing submergence height and then remained stable after the size of the inlet approached 600 mm, whereas the overall absorption efficiency of the venturi-bubbling reactor remained constant. The optimum operating temperature range was 10 °C-50 °C. The experimental system kept the outlet concentration below the emergency discharge standard for a continuous period of 48 h following practical use in the gas field and resulting in significant enhancement in mass transfer performance, fully satisfying the emergency requirements.
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Affiliation(s)
- Guangwen Zhang
- State
Key Laboratory of Chemicals Safety, Qingdao 266071, P. R. China
- SINOPEC
Research Institute of Safety Engineering Company, Limited Qingdao 266071, P. R. China
| | - Yi Zheng
- State
Key Laboratory of Chemicals Safety, Qingdao 266071, P. R. China
- SINOPEC
Research Institute of Safety Engineering Company, Limited Qingdao 266071, P. R. China
| | - Yong Zhao Dong
- SINOPEC
Health, Safety and Environmental Protection
Management Department, Beijing 100728, P. R. China
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2
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Hill D, Niu Y, Apsey H, Olonisakin O, Palmer RE, Alexander S. Development of CuO/Cu 4(OH) 6SO 4 Nanoparticle Mixtures to Optimize the H 2S Adsorption. ACS APPLIED ENGINEERING MATERIALS 2024; 2:305-312. [PMID: 38419977 PMCID: PMC10897877 DOI: 10.1021/acsaenm.3c00575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 01/10/2024] [Accepted: 01/11/2024] [Indexed: 03/02/2024]
Abstract
In this paper, we report the H2S adsorption behavior of a sorbent composed of mixtures of tenorite (CuO) and brochantite [Cu4(OH)6SO4]. These materials are readily prepared through the addition of NaOH(aq) to CuSO4(aq). They can be loaded onto polymer foams to create effective filters that can remove malodorous H2S gas, as evidenced by breakthrough tests. X-ray diffraction shows that the ratio of the two compounds in the mixture can be finely tuned by varying the amount of NaOH(aq) that is added to the reaction mixture. X-ray photoelectron spectroscopy shows that brochantite, like tenorite, has the ability to chemically adsorb H2S. Correlation of the H2S breakthrough data with scanning transmission electron microscopy measurements shows that the most effective sorbents contain nanoscale needle-like particles. These are likely to be formed largely by the tenorite phase. The samples with the greatest H2S adsorption efficacy contained less than 20% tenorite in the mixture, where these particles had the greatest abundance. The application of this sorbent onto porous substrates to create effective filters, along with the synthetic ease of its production, could allow this methodology to find use in a number of areas where H2S poses a problem. This could include areas where protective clothing is required to adsorb the gas from environments where there is a high level of H2S, for example, in wastewater treatment plants, oil and gas wells, or in the medical sector, where it could be deployed as filter media.
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Affiliation(s)
- Donald Hill
- Energy
Safety Research Institute (ESRI), Faculty of Science and Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, U.K.
| | - Yubiao Niu
- Nanomaterials
Lab, Faculty of Science and Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, U.K.
| | - Henry Apsey
- Energy
Safety Research Institute (ESRI), Faculty of Science and Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, U.K.
| | - Omotoke Olonisakin
- Energy
Safety Research Institute (ESRI), Faculty of Science and Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, U.K.
| | - Richard E. Palmer
- Nanomaterials
Lab, Faculty of Science and Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, U.K.
| | - Shirin Alexander
- Energy
Safety Research Institute (ESRI), Faculty of Science and Engineering, Swansea University, Bay Campus, Fabian Way, Swansea SA1 8EN, U.K.
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3
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Ru Z, Zhang X, Zhang M, Mi J, Cao C, Yan Z, Ge M, Liu H, Wang J, Zhang W, Cai W, Lai Y, Feng Y. Bimetallic-MOF-Derived Zn xCo 3-xO 4/Carbon Nanofiber Composited Sorbents for High-Temperature Coal Gas Desulfurization. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2022; 56:17288-17297. [PMID: 36214751 DOI: 10.1021/acs.est.2c04193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Desulfurization sorbent with a high active component utilization is of importance for the removal of H2S from coal gas at high temperatures. Thus, the hypothesis for producing ZnxCo3-xO4/carbon nanofiber sorbents via the combinations of electrospinning, in situ hydrothermal growth, and carbonization technique has been rationally constructed in this study. ZnxCo3-xO4 nanoparticles derived from metal-organic frameworks are uniformly loaded on the electrospun carbon nanofibers (CNFs) with high dispersion. ZnxCo3-xO4/CNFs sorbents possess the highest breakthrough sulfur adsorption capacity (12.4 g S/100 g sorbent) and an excellent utilization rate of the active component (83.2%). The excellent performance of ZnxCo3-xO4/CNFs can be attributed to the synergetic effect of the hierarchical structure and widely distributed ZnxCo3-xO4 on the CNFs supporter. The decomposition of Zn/Co-ZIFs not only generates the nucleus of oxides but also realizes their physical isolation through the formation of carbon grids on the surface of CNFs, avoiding the aggregation of oxides. Furthermore, ZnxCo3-xO4/CNFs sorbents show an overwhelming superiority over the ZnO/CNFs sorbent, which is attributed to the introduction of Co and then the promotion of the stability of Zn at high temperatures. The presence of Co also accelerates the adsorption of H2S on the active site of the oxide surface. The presented method is beneficial for promoting desulfurization performances and producing sorbents with high utilization of active components.
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Affiliation(s)
- Ziwei Ru
- College of Textile Engineering, Taiyuan University of Technology, Jinzhong030600, P. R. China
| | - Xin Zhang
- College of Textile Engineering, Taiyuan University of Technology, Jinzhong030600, P. R. China
| | - Man Zhang
- College of Textile Engineering, Taiyuan University of Technology, Jinzhong030600, P. R. China
| | - Jie Mi
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan030024, P. R. China
- Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan030024, P. R. China
| | - Chunyan Cao
- Department of Biomedical Sciences, City University of Hong Kong, Kowloon, Hong Kong999077, P. R. China
| | - Zhifeng Yan
- College of Textile Engineering, Taiyuan University of Technology, Jinzhong030600, P. R. China
| | - Mingzheng Ge
- School of Textile and Clothing, Nantong University, Nantong226019, P. R. China
- Institute of Applied Physics and Materials Engineering, University of Macau, Macau999078, P. R. China
| | - Hongchao Liu
- Institute of Applied Physics and Materials Engineering, University of Macau, Macau999078, P. R. China
| | - Jiancheng Wang
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan030024, P. R. China
- Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan030024, P. R. China
| | - Wei Zhang
- School of Textile and Clothing, Nantong University, Nantong226019, P. R. China
| | - Weilong Cai
- College of Chemical Engineering, Fuzhou University, Fuzhou350116, P. R. China
| | - Yuekun Lai
- College of Chemical Engineering, Fuzhou University, Fuzhou350116, P. R. China
| | - Yu Feng
- State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan030024, P. R. China
- Key Laboratory of Coal Science and Technology, Ministry of Education, Taiyuan University of Technology, Taiyuan030024, P. R. China
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4
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Gupta N, Achary SN, Viltres H, Bae J, Kim KS. Fabrication of Na 0.4MnO 2 Microrods for Room-Temperature Oxidation of Sulfurous Gases. ACS OMEGA 2022; 7:37774-37781. [PMID: 36312367 PMCID: PMC9608406 DOI: 10.1021/acsomega.2c04773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 10/05/2022] [Indexed: 06/16/2023]
Abstract
Phase pure Na0.4MnO2 microrods crystallized in the orthorhombic symmetry were fabricated for the wet oxidation of H2S and SO2 gases at room temperature. The material was found highly effective for the mineralization of low concentrations of acidic gases. The material was fully regenerable after soaking in a basic H2O2 solution.
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Affiliation(s)
- Nishesh
Kumar Gupta
- Department
of Environmental Research, University of
Science and Technology (UST), Daejeon34113, Korea
- Department
of Environmental Research, Korea Institute
of Civil Engineering and Building Technology (KICT), Goyang10223, Korea
| | - Srungarpu N. Achary
- Chemistry
Division, Bhabha Atomic Research Centre, Trombay, Mumbai400085, India
| | - Herlys Viltres
- School
of Engineering Practice and Technology, McMaster University, 1280 Main Street, West Hamilton, OntarioL8S 4L8, Canada
| | - Jiyeol Bae
- Department
of Environmental Research, University of
Science and Technology (UST), Daejeon34113, Korea
- Department
of Environmental Research, Korea Institute
of Civil Engineering and Building Technology (KICT), Goyang10223, Korea
| | - Kwang Soo Kim
- Department
of Environmental Research, University of
Science and Technology (UST), Daejeon34113, Korea
- Department
of Environmental Research, Korea Institute
of Civil Engineering and Building Technology (KICT), Goyang10223, Korea
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5
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Guo Z, Zhang Z, Cao X, Feng D. Fe-Ti bimetal oxide adsorbent for removing low concentration H 2S at room temperature. ENVIRONMENTAL TECHNOLOGY 2022; 43:3693-3705. [PMID: 33998970 DOI: 10.1080/09593330.2021.1931472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 05/06/2021] [Indexed: 06/12/2023]
Abstract
ABSTRACTHerein, a series of Fe-Ti bimetal oxide adsorbents were prepared by reduction-co-precipitation method, and their performance in removing low concentration H2S at room temperature was investigated. The adsorbents were characterized by X-Ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), Ultraviolet Visible diffuse reflectance spectroscopy (UV-Vis-DRS), X-Ray photoelectron spectroscopy (XPS) and N2 adsorption-desorption. The results showed that the addition of Ti increased the specific surface area, pore volume and small oligomeric Fe2O3 of ferrihydrite. When the Fe/Ti molar ratio was 8:1, Fe-Ti bimetal oxide formed a large amount of oligomeric Fe2O3, and its specific surface area and pore volume reached 344.99 m2/g and 0.34 cm3/g, respectively. At this time, Fe-Ti bimetal oxide exhibited the highest breakthrough sulfur capacity of 222.8 mg/g. High temperature calcination caused Fe-Ti bimetal oxide to form small specific surface area and pore volume, and produced crystalline α-Fe2O3. And the breakthrough sulfur capacity of Fe-Ti bimetal oxide decreased with the increasing calcination temperature. In addition, the desulfurization process conformed to the unreacted shrinking nucleus model.
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Affiliation(s)
- Zhuangzhuang Guo
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, People's Republic of China
| | - Zhihong Zhang
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, People's Republic of China
| | - Xiaoyan Cao
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, People's Republic of China
| | - Dongfang Feng
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, People's Republic of China
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6
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Further Use of Spent Co-Based Macroporous Adsorbent for Low-Temperature Hydrodesulfurization. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02437-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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7
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Mao D, Griffin JM, Dawson R, Fairhurst A, Gupta G, Bimbo N. Porous materials for low-temperature H2S-removal in fuel cell applications. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119426] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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8
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Synthesis of ZnO-CuO and ZnO-Co3O4 Materials with Three-Dimensionally Ordered Macroporous Structure and Its H2S Removal Performance at Low-Temperature. Processes (Basel) 2021. [DOI: 10.3390/pr9111925] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
H2S is a common but hazardous impurity in syngas, biogas, or natural gas. For some advanced power generation technologies, such as integrated gasification combined cycle (IGCC), solid oxide fuel cells, H2S content needs to be reduced to an acceptable level. In this work, a series of highly porous Zn-Cu and Zn-Co composites with three-dimensionally ordered macropores (3DOM) structure were synthesized via the colloidal crystal template method and used to remove H2S at 150 °C and one atm. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), nitrogen adsorption studies, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were carried out to analyze the fresh and spent adsorbents. The results show that all the adsorbents possess well-ordered macropores, a large surface area, and a highly dispersed active phase. The relative content of Zn and (Cu or Co) has a significant influence on the desulfurization performance of adsorbents. The addition of CuO significantly increases the sulfur capacity and 3DOM-Zn0.5Cu0.5 shows the largest sulfur capacity of all the adsorbents, reaching up to 102.5 mg/g. The multiple adsorption/regeneration cycles of 3DOM-Zn0.5Cu0.5 and 3DOM-Zn0.5Co0.5 indicate that the as-prepared adsorbents are stable, and the sulfur capacity can still exceed 65% of the fresh adsorbents after six cycles.
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9
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Gupta NK, Bae J, Kim KS. Metal organic framework derived NaCo xO y for room temperature hydrogen sulfide removal. Sci Rep 2021; 11:14740. [PMID: 34282220 PMCID: PMC8290053 DOI: 10.1038/s41598-021-94265-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 06/16/2021] [Indexed: 12/02/2022] Open
Abstract
Novel NaCoxOy adsorbents were fabricated by air calcination of (Na,Co)-organic frameworks at 700 °C. The NaCoxOy crystallized as hexagonal microsheets of 100-200 nm thickness with the presence of some polyhedral nanocrystals. The surface area was in the range of 1.15-1.90 m2 g-1. X-ray photoelectron spectroscopy (XPS) analysis confirmed Co2+ and Co3+ sites in MOFs, which were preserved in NaCoxOy. The synthesized adsorbents were studied for room-temperature H2S removal in both dry and moist conditions. NaCoxOy adsorbents were found ~ 80 times better than the MOF precursors. The maximum adsorption capacity of 168.2 mg g-1 was recorded for a 500 ppm H2S concentration flowing at a rate of 0.1 L min-1. The adsorption capacity decreased in the moist condition due to the competitive nature of water molecules for the H2S-binding sites. The PXRD analysis predicted Co3S4, CoSO4, Co3O4, and Co(OH)2 in the H2S-exposed sample. The XPS analysis confirmed the formation of sulfide, sulfur, and sulfate as the products of H2S oxidation at room temperature. The work reported here is the first study on the use of NaCoxOy type materials for H2S remediation.
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Affiliation(s)
- Nishesh Kumar Gupta
- University of Science and Technology (UST), Daejeon, Republic of Korea
- Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea
| | - Jiyeol Bae
- University of Science and Technology (UST), Daejeon, Republic of Korea.
- Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea.
| | - Kwang Soo Kim
- University of Science and Technology (UST), Daejeon, Republic of Korea
- Department of Land, Water, and Environment Research, Korea Institute of Civil Engineering and Building Technology (KICT), Goyang, Republic of Korea
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10
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Covalent modification of reduced graphene oxide with piperazine as a novel nanoadsorbent for removal of H2S gas. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04214-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Removal of Hydrogen Sulfide From Various Industrial Gases: A Review of The Most Promising Adsorbing Materials. Catalysts 2020. [DOI: 10.3390/catal10050521] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The separation of hydrogen sulfide (H2S) from gas streams has significant economic and environmental repercussions for the oil and gas industries. The present work reviews H2S separation via nonreactive and reactive adsorption from various industrial gases, focusing on the most commonly used materials i.e., natural or synthetic zeolites, activated carbons, and metal oxides. In respect to cation-exchanged zeolites, attention should also be paid to parameters such as structural and performance regenerability, low adsorption temperatures, and thermal conductivities, in order to create more efficient materials in terms of H2S adsorption. Although in the literature it is reported that activated carbons can generally achieve higher adsorption capacities than zeolites and metal oxides, they exhibit poor regeneration potential. Future work should mainly focus on finding the optimum temperature, solvent concentration, and regeneration time in order to increase regeneration efficiency. Metal oxides have also been extensively used as adsorbents for hydrogen sulfide capture. Among these materials, ZnO and Cu–Zn–O have been studied the most, as they seem to offer improved H2S adsorption capacities. However, there is a clear lack of understanding in relation to the basic sulfidation mechanisms. The elucidation of these reaction mechanisms will be a toilsome but necessary undertaking in order to design materials with high regenerative capacity and structural reversibility.
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12
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Martínez-Ahumada E, López-Olvera A, Jancik V, Sánchez-Bautista JE, González-Zamora E, Martis V, Williams DR, Ibarra IA. MOF Materials for the Capture of Highly Toxic H2S and SO2. Organometallics 2020. [DOI: 10.1021/acs.organomet.9b00735] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Eva Martínez-Ahumada
- Laboratorio de Fisicoquímica y Reactividad de Superficies, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, C.P. 04510, Coyoacán, Ciudad de México, México
| | - Alfredo López-Olvera
- Laboratorio de Fisicoquímica y Reactividad de Superficies, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, C.P. 04510, Coyoacán, Ciudad de México, México
| | - Vojtech Jancik
- Centro Conjunto de Investigaciones en Química Sustentable UAEM-UNAM, Carr. Toluca-Atlacomulco Km 14.5, Toluca, Estado de México 50200, México
- Universidad Nacional Autónoma de México, Instituto de Química, Ciudad Universitaria, Ciudad de México 04510, México
| | - Jonathan E. Sánchez-Bautista
- Laboratorio de Fisicoquímica y Reactividad de Superficies, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, C.P. 04510, Coyoacán, Ciudad de México, México
| | - Eduardo González-Zamora
- Departamento de Química, Universidad Autónoma Metropolitana-Iztapalapa, San Rafael Atlixco 186, Col. Vicentina, C. P. 09340, Ciudad de México, México
| | - Vladimir Martis
- Surface Measurement Systems, Unit 5, Wharfside, Rosemont Road, London HA0 4PE, U.K
| | - Daryl R. Williams
- Surfaces and Particle Engineering Laboratory (SPEL), Department of Chemical Engineering, Imperial College London, South Kensington Campus, London SW7 2AZ, U.K
| | - Ilich A. Ibarra
- Laboratorio de Fisicoquímica y Reactividad de Superficies, Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Circuito Exterior S/N, Ciudad Universitaria, C.P. 04510, Coyoacán, Ciudad de México, México
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13
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Khabazipour M, Anbia M. Removal of Hydrogen Sulfide from Gas Streams Using Porous Materials: A Review. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03800] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Maryam Khabazipour
- Department of Chemistry, Research Laboratory of Nanoporous Materials, Iran University of Science and Technology, Farjam Street, Narmak, P.O. Box 16846-13114, Tehran, Iran
| | - Mansoor Anbia
- Department of Chemistry, Research Laboratory of Nanoporous Materials, Iran University of Science and Technology, Farjam Street, Narmak, P.O. Box 16846-13114, Tehran, Iran
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14
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Yang C, Kou J, Fan H, Tian Z, Kong W, Shangguan J. Facile and Versatile Sol-Gel Strategy for the Preparation of a High-Loaded ZnO/SiO 2 Adsorbent for Room-Temperature H 2S Removal. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:7759-7768. [PMID: 31140809 DOI: 10.1021/acs.langmuir.9b00853] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Preparation of well-dispersed ZnO nanograins is necessary to improve their reactivity toward room-temperature H2S removal. However, the challenge to design such a ZnO-based adsorbent with high ZnO loading is yet to be fulfilled. Herein, a facile sol-gel strategy is reported for the preparation of ZnO/SiO2 adsorbents for efficient H2S removal, by innovating a gel-drying method and simultaneously controlling ZnO grain formation through optimizing the molar ratio of ethylene glycol (EG)/nitrates in its precursors. The fabricated adsorbent embedded well-dispersed ZnO nanograins, of approximately 10-15 nm, into a SiO2 matrix (57 wt % ZnO loading) and thus yielded a high H2S removal capacity of 108.9 mg S/g sorbent. Therein, EG was used as a modifier for inhibiting the formation of a denser SiO2 network during the gel drying process and was used as a fuel for promoting the decomposition of nitrates and increasing the surface area of the composites in the subsequent calcination. Modulating the molar ratio of EG/nitrates ≤ 2 in precursors or traditional drying of the gel in an oven should be avoided because these would lead to the oxidation of EG by metallic nitrates and form carboxylate complexes during the gel-drying process. Although the produced ZnO grains had a very small size of less than 5 nm, a layer of monodentate ZnCO3 impurity was formed on the ZnO surface, which will drastically decrease the reactivity of ZnO toward H2S. According to the encouraging results from CuO and Co3O4, this strategy has proved to be versatile for the preparation of other metal oxide/SiO2 adsorbents.
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Affiliation(s)
| | | | | | - Zhen Tian
- Deparment of Analysis and Service Center , Micromeritics Instrumental Ltd , Shanghai 1071 , China
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15
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Zhao Y, Zhang Z, Yang C, Fan H, Wang J, Tian Z, Zhang H. Critical Role of Water on the Surface of ZnO in H 2S Removal at Room Temperature. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b03431] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- YingRui Zhao
- State Key Laboratory of Coal Science and Technology, Co-founded by Shanxi Province and the Ministry of Science and Technology, Institute for Chemical Engineering of Coal, Taiyuan University of Technology, Taiyuan 030024, PR China
| | | | - Chao Yang
- State Key Laboratory of Coal Science and Technology, Co-founded by Shanxi Province and the Ministry of Science and Technology, Institute for Chemical Engineering of Coal, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - HuiLing Fan
- State Key Laboratory of Coal Science and Technology, Co-founded by Shanxi Province and the Ministry of Science and Technology, Institute for Chemical Engineering of Coal, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Jian Wang
- State Key Laboratory of Coal Science and Technology, Co-founded by Shanxi Province and the Ministry of Science and Technology, Institute for Chemical Engineering of Coal, Taiyuan University of Technology, Taiyuan 030024, PR China
| | - Zhen Tian
- Department of Analysis and Service Center Micromertics Instrumental Ltd., Shanghai 200000, PR China
| | - HongYan Zhang
- State Key Laboratory of Coal Science and Technology, Co-founded by Shanxi Province and the Ministry of Science and Technology, Institute for Chemical Engineering of Coal, Taiyuan University of Technology, Taiyuan 030024, PR China
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