Heteroatom doped iron-based catalysts prepared by urea self-combustion method for efficient CO2 hydrogenation

FUEL

卷:276

Article

Guo, Lisheng¹  Li, Jie²  Zeng, Yan¹  Kosol, Rungtiwa¹  Cui, Yu¹  Kodama, Naoya¹  Guo, Xiaoyu¹  Prasert, R.³  Tharapong, V³  Liu, Guangbo⁴  Wu, Jinhu⁴  Yang, Guohui¹  Yoneyama, Yoshiharu¹  Tsubaki, Noritatsu¹ 

[1] Univ Toyama, Sch Engn, Dept Appl Chem, Gofuku 3190, Toyama 9308555, Japan

[2] Yangzhou Univ, Sch Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China

[3] Chulalongkorn Univ, Fac Sci, Dept Chem Technol, Bangkok 10330, Thailand

[4] Chinese Acad Sci, Qingdao Inst Biomass Energy & Bioproc Technol, Qingdao, Peoples R China

关键词: CO2 hydrogenation;    Spinel structure;    Iron catalyst;    Olefins;    Bimetallic catalyst;   

DOI  :  10.1016/j.fuel.2020.118102

来源: Elsevier

【 摘 要 】

This work describes a novel route for the fabrication of heteroatom doped iron-based catalysts (spinel-like structure) through urea self-combustion method, and catalytic performances over these self-combustion catalysts are investigated in detail. It is found that catalytic performances are affected by the properties of doped metals. Owing to the high methanation activity of Ni and Co, NiFe2Ox and CoFe2Ox catalysts present high CH4 selectivity compared to Fe2O3 catalysts. MgFe2Ox exhibits high olefin hydrogenation ability. By contrast, the utilization of Cu and Zn promotes catalytic activity and olefins selectivity via regulating surface CO2 adsorption and carbides content. Among these spinel catalysts, the ZnFe2Ox catalyst shows the best CO2 hydrogenation performance. Enhanced CO2 adsorptions as well as active species of carbides result in the benign hydrogenation behavior. Meanwhile, the effects of Zn/Fe molar ratio are also investigated. It is worth noting that the catalytic performance can be improved regardless of the added amount of Zn promoter. Nevertheless, the catalytic performance reaches the best level when the Zn/Fe molar ratio equals 1/2. The proposed method provides a new strategy different from traditional catalyst preparation process for catalytic hydrogenation of CO2 into highly valuable products.

【 授权许可】

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