{"title":"Ru/CeO2 catalyst derived from Ce-based MOF for highly efficient catalytic CO2 methanation integrated with renewable hydrogen","authors":"Yucan He, Dongsen Mao, Qiangsheng Guo, Jun Yu","doi":"10.1016/j.fuproc.2024.108101","DOIUrl":null,"url":null,"abstract":"<div><p>A series of highly ordered microporous Ce-based metal-organic frameworks (MOFs) were synthesized as the precursors for catalyst construction. The corresponding Ru catalysts were prepared by Ru impregnation on the derived CeO<sub>2</sub> by pyrolysis of Ce-MOF, and investigated for the CH<sub>4</sub> synthesis via CO<sub>2</sub> hydrogenation. Among the catalysts, Ru catalyst supported on the CeO<sub>2</sub>-B derived from Ce-BDC exhibited a highly competitive efficiency for CO<sub>2</sub> methanation, giving a CH<sub>4</sub> selectivity of 100% with a CO<sub>2</sub> conversion of 62% at 275 °C and 0.1 MPa, and the CH<sub>4</sub> productivity reached 0.49 mol/(mol<sub>Ru</sub>·h). Characterization results revealed that more oxygen vacancies and corresponding surface oxygen species formed on the surface of CeO<sub>2</sub>-B derived from Ce-BDC caused to the stronger interaction between Ru and CeO<sub>2</sub>-B, which promoted the CO<sub>2</sub> adsorption and hydrogenation capacity of the catalyst, resulting in its better catalytic property. In situ diffuse reflectance infrared Fourier transform (DRIFT) studies further revealed that the route of HCOO* into CH<sub>4</sub> is a more competitive way of CO<sub>2</sub> hydrogenation to CH<sub>4</sub>.</p></div>","PeriodicalId":326,"journal":{"name":"Fuel Processing Technology","volume":"259 ","pages":"Article 108101"},"PeriodicalIF":7.2000,"publicationDate":"2024-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0378382024000717/pdfft?md5=fec48642073e0021b3d610c02de73c98&pid=1-s2.0-S0378382024000717-main.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Fuel Processing Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378382024000717","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 0
Abstract
A series of highly ordered microporous Ce-based metal-organic frameworks (MOFs) were synthesized as the precursors for catalyst construction. The corresponding Ru catalysts were prepared by Ru impregnation on the derived CeO2 by pyrolysis of Ce-MOF, and investigated for the CH4 synthesis via CO2 hydrogenation. Among the catalysts, Ru catalyst supported on the CeO2-B derived from Ce-BDC exhibited a highly competitive efficiency for CO2 methanation, giving a CH4 selectivity of 100% with a CO2 conversion of 62% at 275 °C and 0.1 MPa, and the CH4 productivity reached 0.49 mol/(molRu·h). Characterization results revealed that more oxygen vacancies and corresponding surface oxygen species formed on the surface of CeO2-B derived from Ce-BDC caused to the stronger interaction between Ru and CeO2-B, which promoted the CO2 adsorption and hydrogenation capacity of the catalyst, resulting in its better catalytic property. In situ diffuse reflectance infrared Fourier transform (DRIFT) studies further revealed that the route of HCOO* into CH4 is a more competitive way of CO2 hydrogenation to CH4.
期刊介绍:
Fuel Processing Technology (FPT) deals with the scientific and technological aspects of converting fossil and renewable resources to clean fuels, value-added chemicals, fuel-related advanced carbon materials and by-products. In addition to the traditional non-nuclear fossil fuels, biomass and wastes, papers on the integration of renewables such as solar and wind energy and energy storage into the fuel processing processes, as well as papers on the production and conversion of non-carbon-containing fuels such as hydrogen and ammonia, are also welcome. While chemical conversion is emphasized, papers on advanced physical conversion processes are also considered for publication in FPT. Papers on the fundamental aspects of fuel structure and properties will also be considered.