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Quaternary Fe‐Cu‐Cr‐Al HT‐WGS Catalysts – Effect of Al Substitution on the Efficiency at Steam‐Lean Process Gas
Author(s) -
Kowalik Paweł,
Bicki Robert,
AntoniakJurak Katarzyna,
Michalska Kamila,
Próchniak Wiesław,
Mrozek Anna
Publication year - 2020
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.202000491
Subject(s) - catalysis , chemistry , selectivity , molar ratio , water gas shift reaction , sorption , precipitation , transition metal , inorganic chemistry , chemical engineering , organic chemistry , adsorption , engineering , physics , meteorology
In the present work, we report on Fe–Cu–Cr–Al systems with various Cr/Al substitution as catalysts for high‐temperature water‐gas shift (HT‐WGS) to evaluate the possibility of Cr elimination and usability for carrying out the HT‐WGS process at steam‐lean process gas. The set of Fe–Cu–Cr–Al catalysts with the same Fe/Cu molar ratio and different Cr/Al molar ratio (0/∞) were prepared by the precursors' co‐precipitation and thermal treatment. The catalysts were investigated by XRF, DTG/MS, XRD, N 2 sorption, H 2 ‐TPR methods and activity tests. A relationship between Cr/Al ratio and physicochemical parameters and HT‐WGS activity, selectivity and stability of the catalysts have been estimated. Experimental results demonstrated that complete elimination of Cr from the Fe–Cu–Cr–Al catalyst is unfavorable, and it would lead to negative consequences as Cr enhances the catalyst activity and improve its durability.