{"title":"CO2 Conversion into Light Olefins Using an InCeZrOX/H-ZSM-5-Si Bifunctional Catalyst","authors":"Zheng Yuan, Xia Lv, Muhammad Irfan, Guofeng Zhao, Jichang Liu, Haitao Xu","doi":"10.1021/acs.iecr.4c01132","DOIUrl":null,"url":null,"abstract":"Carbon dioxide (CO<sub>2</sub>) conversion into light olefins (C<sub>2</sub><sup>=</sup>–C<sub>4</sub><sup>=</sup>) using green hydrogen is a desirable strategy to reduce CO<sub>2</sub> emissions and obtain valuable chemicals. Although ZSM-5-based bifunctional catalysts exhibit unique characteristics that render them suitable for various processes, they are rarely used for CO<sub>2</sub> conversion into C<sub>2</sub><sup>=</sup>–C<sub>4</sub><sup>=</sup>. Herein, an In<sub>0.9</sub>Ce<sub>1</sub>Zr<sub>4</sub>O<sub><i>X</i></sub>/H-ZSM-5-Si bifunctional catalyst composed of In<sub>0.9</sub>Ce<sub>1</sub>Zr<sub>4</sub>O<sub><i>X</i></sub> and tetraethyl orthosilicate (TEOS)-passivated H-ZSM-5-Si was prepared for CO<sub>2</sub> conversion into light olefins. CO<sub>2</sub> on In<sub>0.9</sub>Ce<sub>1</sub>Zr<sub>4</sub>O<sub><i>X</i></sub>/H-ZSM-5-Si exhibits a selectivity of 60.3% for C<sub>2</sub><sup>=</sup>–C<sub>4</sub><sup>=</sup>, 5.9% for CH<sub>4</sub>, and 17.2% for C<sub>5+</sub> in hydrocarbons. The CO selectivity in the total products is 63.6%. The doping of In and Ce increases the concentration of surface oxygen vacancies, thereby enhancing the adsorption of CO<sub>2</sub> and H<sub>2</sub>. The passivation of H-ZSM-5-Si by TEOS effectively reduces its acidity, promoting the generation of C<sub>2</sub><sup>=</sup>–C<sub>4</sub><sup>=</sup>.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Industrial & Engineering Chemistry Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1021/acs.iecr.4c01132","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Carbon dioxide (CO2) conversion into light olefins (C2=–C4=) using green hydrogen is a desirable strategy to reduce CO2 emissions and obtain valuable chemicals. Although ZSM-5-based bifunctional catalysts exhibit unique characteristics that render them suitable for various processes, they are rarely used for CO2 conversion into C2=–C4=. Herein, an In0.9Ce1Zr4OX/H-ZSM-5-Si bifunctional catalyst composed of In0.9Ce1Zr4OX and tetraethyl orthosilicate (TEOS)-passivated H-ZSM-5-Si was prepared for CO2 conversion into light olefins. CO2 on In0.9Ce1Zr4OX/H-ZSM-5-Si exhibits a selectivity of 60.3% for C2=–C4=, 5.9% for CH4, and 17.2% for C5+ in hydrocarbons. The CO selectivity in the total products is 63.6%. The doping of In and Ce increases the concentration of surface oxygen vacancies, thereby enhancing the adsorption of CO2 and H2. The passivation of H-ZSM-5-Si by TEOS effectively reduces its acidity, promoting the generation of C2=–C4=.
期刊介绍:
ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.