Effects of indium promoter on iron-based catalysts for CO2 hydrogenation to hydrocarbons. (November 2022)

• Record Type: Journal Article
• Authors: Liu, Junhui; Li, Bing; Cao, Junying; Song, Chunshan; Guo, Xinwen
• Is Part Of: Journal of CO₂ utilization. Volume 65(2022)
• Publication Date: 2022-11
• Subjects: CO2 hydrogenation -- Iron-based catalysts -- Indium promoter -- Hydrocarbons; Carbon dioxide -- Periodicals; Carbon dioxide -- Environmental aspects -- Periodicals; Carbon dioxide mitigation -- Periodicals; Carbon dioxide; Carbon dioxide -- Environmental aspects; Carbon dioxide mitigation; Periodicals; 628.53205
• DOI: 10.1016/j.jcou.2022.102243
• Languages: English
• ISSNs: 2212-9820

Abstract

Abstract: Conversion of CO2 to value-added chemicals by hydrogenation is considered as a promising way for CO2 utilization. Addition of promoters into iron-based catalysts is a crucial strategy to enhance the catalytic performance in CO2 hydrogenation. In this work, indium (In) was introduced into iron-based catalyst as a promoter to improve the conversion efficiency of CO2 . The promotional effects of In on CO2 hydrogenation were also studied by varying In loading. In promoter can accelerate the reduction of ferric oxide in iron-based catalysts. The evolution of In species had a significant influence on iron species during reaction, leading to the obvious induction period for the In-promoted catalysts with more than 3 wt% In loadings. Addition of In enhanced the adsorption of CO2, and obviously improved the CO2 conversion. The CO selectivity over In-promoted catalysts slightly decreased, while the distribution of hydrocarbons changed a little. The CO2 conversion over 10Fe2In1K/Al2 O3 increased 17% compared with that over the benchmark 10Fe1K/Al2 O3 catalyst. The insights into the promotional effects of In provides a value choice to design iron-based catalysts for CO2 hydrogenation. Graphical Abstract: ga1 Highlights: Addition of indium enhanced the adsorption of CO2 and efficiently improved the CO2 conversion. Indium promoter can accelerate the reduction of ferric oxide in iron-based catalysts. The obvious induction period was observed for the catalysts, where In loading was more than 3 wt%. The process of In2 O3 → In → In2 O3 had a significant influence on the evolution of Fe species during reaction.