燃料化学学报（中英文）2025，Vol.53Issue(4)：504-514,11.DOI:10.1016/S1872-5813(24)60505-0
Fe/SAPO-34催化剂制备及其CO加氢制低碳烯烃性能研究
Preparation of Fe/SAPO-34 catalyst and its performance in CO hydrogenation to light olefins
摘要
Abstract
Fischer-Tropsch synthesis is an important route to synthesize light olefins from syngas.However,precise control of the product selectivity and enhancing carbon utilization efficiency remains a challenge.Herein,a series of Fe/SAPO-34 catalysts with different Fe contents were prepared using negative pressure impregnation method,and their performance in CO hydrogenation reaction was evaluated.Combined N2 adsorption/desorption,XRD,SEM,NH3-TPD,and CO-TPD characterizations,the structure-performance relationship of the Fe/SAPO-34 catalysts was clarified.The results showed that with the increase of Fe loading,the strength and quantity of the acidity of the catalysts decreased sequentially,while the CO non-dissociation activation ability was weakened and the CO dissociation activation ability was enhanced,resulting in an increasing and decreasing trend in the selectivity of light olefins and oxygenates,respectively.Under a mild reaction conditions of t=200℃,p=2.0 MPa,GHSV=3300 h-1,in the carbon products containing CO2,the selectivity of light olefins and oxygenates over 5%Fe/SAPO-34 catalyst was 16.2%and 52.6%,respectively;while that over 25%Fe/SAPO-34 catalyst was 31.9%and 16.9%,respectively.A reasonable reaction mechanism was proposed based on the in situ IR characterization.This study provides a new way for the research and development of catalyst for light olefins synthesis with enhanced carbon utilization efficiency,showing promising application prospects.关键词
费托合成/铁基催化剂/SAPO-34分子筛/低碳烯烃Key words
Fischer-Tropsch synthesis/iron based catalyst/SAPO-34 zeolite/light olefins分类
化学化工引用本文复制引用
李柳柳,张明伟,汪颖军,房克功..Fe/SAPO-34催化剂制备及其CO加氢制低碳烯烃性能研究[J].燃料化学学报（中英文）,2025,53(4):504-514,11.基金项目
The project was supported by National Key R&D Program of China(2023YFB4103203)and Natural Science Foundation of Shanxi(202103021224445).国家重点研发计划(2023YFB4103203)和山西省自然科学基金(202103021224445)资助 （2023YFB4103203）
