{"title":"Improved CO selectivity during CO2 hydrogenation by bimetallic copper-cobalt supported SBA-15","authors":"María Escamilla, Alfonso Caballero, Gerardo Colón","doi":"10.1016/j.jcou.2025.103032","DOIUrl":null,"url":null,"abstract":"<div><div>Co-Cu/SBA-15 systems have been studied for the reverse water gas shift (rWGS) reaction within mild temperature range of 250–650 ºC. CuOx and CoOx species at different weight ratios were deposited from wet impregnation method over SBA-15 support. We have stated that pre-reduction treatment before reaction leads to the complete Co and Cu reduction for Co-Cu/SBA systems. A low copper content on Co/SBA system leads to similar CO<sub>2</sub> conversion than monometallic Co-catalyst. However, competitive Sabatier side reaction appears almost suppressed. So, upon Cu incorporation a significant improvement on CO yield has been attained with respect to Co/SBA catalyst. Thus, a good compromise is attained at 450 ºC using Co5Cu5/SBA catalyst for which a stable CO<sub>2</sub> conversion of 22 % and 97 % CO selectivity has been obtained under lowest H<sub>2</sub>:CO<sub>2</sub> ratio.</div></div>","PeriodicalId":350,"journal":{"name":"Journal of CO2 Utilization","volume":"92 ","pages":"Article 103032"},"PeriodicalIF":7.2000,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of CO2 Utilization","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2212982025000162","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Co-Cu/SBA-15 systems have been studied for the reverse water gas shift (rWGS) reaction within mild temperature range of 250–650 ºC. CuOx and CoOx species at different weight ratios were deposited from wet impregnation method over SBA-15 support. We have stated that pre-reduction treatment before reaction leads to the complete Co and Cu reduction for Co-Cu/SBA systems. A low copper content on Co/SBA system leads to similar CO2 conversion than monometallic Co-catalyst. However, competitive Sabatier side reaction appears almost suppressed. So, upon Cu incorporation a significant improvement on CO yield has been attained with respect to Co/SBA catalyst. Thus, a good compromise is attained at 450 ºC using Co5Cu5/SBA catalyst for which a stable CO2 conversion of 22 % and 97 % CO selectivity has been obtained under lowest H2:CO2 ratio.
期刊介绍：
The Journal of CO2 Utilization offers a single, multi-disciplinary, scholarly platform for the exchange of novel research in the field of CO2 re-use for scientists and engineers in chemicals, fuels and materials.
The emphasis is on the dissemination of leading-edge research from basic science to the development of new processes, technologies and applications.
The Journal of CO2 Utilization publishes original peer-reviewed research papers, reviews, and short communications, including experimental and theoretical work, and analytical models and simulations.
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