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Catalytic characteristics of a Ni–MgO/HZSM-5 catalyst for steam reforming of toluene
Steam reforming is a potential technology for the conversion of biomass pyrolysis tar into gaseous products. In this study, HZSM-5 was selected as the nickel-based catalyst support and toluene was chosen as the tar model compound. Ni was replaced with MgO to improve the coking resistance of the cata...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society of Chemistry
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9054316/ https://www.ncbi.nlm.nih.gov/pubmed/35517761 http://dx.doi.org/10.1039/d0ra02403a |
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author | Wu, Wei Fan, Qizhou Yi, Baojun Liu, Bichen Jiang, Rujiao |
author_facet | Wu, Wei Fan, Qizhou Yi, Baojun Liu, Bichen Jiang, Rujiao |
author_sort | Wu, Wei |
collection | PubMed |
description | Steam reforming is a potential technology for the conversion of biomass pyrolysis tar into gaseous products. In this study, HZSM-5 was selected as the nickel-based catalyst support and toluene was chosen as the tar model compound. Ni was replaced with MgO to improve the coking resistance of the catalyst. The effects of Ni and MgO loading on toluene conversion and gaseous product generation rate were investigated. The low Ni-loading Ni/HZSM-5 catalyst exhibited poor catalytic activity, whereas a high Ni-loading catalyst displayed poor coking resistance. The addition of the MgO promoter enhanced the steam reforming performance of the Ni/HZSM-5 catalyst with a low loading of active metal Ni (3 wt%). The optimal MgO loading was found at 6 wt%. By characterizing the catalyst before and after the reaction, we found that MgO would enter the wall and pores of the support, resulting in increased pore size and decreased specific surface area. Ni and MgO were combined to form NiO–MgO solid solution active centers, which enhanced the catalytic reforming performance. Moreover, more MgO loading increased the alkaline strength of the catalytic surface, enhanced the adsorption of CO(2), and improved the resistance to carbon deposition. This study revealed the feasibility of replacing Ni with MgO and the potential mechanism of maintaining similar catalytic performance. This study also laid the theoretical foundation for the industrial application of nickel-based catalysts. |
format | Online Article Text |
id | pubmed-9054316 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Royal Society of Chemistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-90543162022-05-04 Catalytic characteristics of a Ni–MgO/HZSM-5 catalyst for steam reforming of toluene Wu, Wei Fan, Qizhou Yi, Baojun Liu, Bichen Jiang, Rujiao RSC Adv Chemistry Steam reforming is a potential technology for the conversion of biomass pyrolysis tar into gaseous products. In this study, HZSM-5 was selected as the nickel-based catalyst support and toluene was chosen as the tar model compound. Ni was replaced with MgO to improve the coking resistance of the catalyst. The effects of Ni and MgO loading on toluene conversion and gaseous product generation rate were investigated. The low Ni-loading Ni/HZSM-5 catalyst exhibited poor catalytic activity, whereas a high Ni-loading catalyst displayed poor coking resistance. The addition of the MgO promoter enhanced the steam reforming performance of the Ni/HZSM-5 catalyst with a low loading of active metal Ni (3 wt%). The optimal MgO loading was found at 6 wt%. By characterizing the catalyst before and after the reaction, we found that MgO would enter the wall and pores of the support, resulting in increased pore size and decreased specific surface area. Ni and MgO were combined to form NiO–MgO solid solution active centers, which enhanced the catalytic reforming performance. Moreover, more MgO loading increased the alkaline strength of the catalytic surface, enhanced the adsorption of CO(2), and improved the resistance to carbon deposition. This study revealed the feasibility of replacing Ni with MgO and the potential mechanism of maintaining similar catalytic performance. This study also laid the theoretical foundation for the industrial application of nickel-based catalysts. The Royal Society of Chemistry 2020-06-02 /pmc/articles/PMC9054316/ /pubmed/35517761 http://dx.doi.org/10.1039/d0ra02403a Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/ |
spellingShingle | Chemistry Wu, Wei Fan, Qizhou Yi, Baojun Liu, Bichen Jiang, Rujiao Catalytic characteristics of a Ni–MgO/HZSM-5 catalyst for steam reforming of toluene |
title | Catalytic characteristics of a Ni–MgO/HZSM-5 catalyst for steam reforming of toluene |
title_full | Catalytic characteristics of a Ni–MgO/HZSM-5 catalyst for steam reforming of toluene |
title_fullStr | Catalytic characteristics of a Ni–MgO/HZSM-5 catalyst for steam reforming of toluene |
title_full_unstemmed | Catalytic characteristics of a Ni–MgO/HZSM-5 catalyst for steam reforming of toluene |
title_short | Catalytic characteristics of a Ni–MgO/HZSM-5 catalyst for steam reforming of toluene |
title_sort | catalytic characteristics of a ni–mgo/hzsm-5 catalyst for steam reforming of toluene |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9054316/ https://www.ncbi.nlm.nih.gov/pubmed/35517761 http://dx.doi.org/10.1039/d0ra02403a |
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