Study on the supported Cu-based catalysts for the low-temperature water–gas shift reaction

• Published in: Catalysis today Vol. 126; no. 3; pp. 436 - 440
• Main Authors: Yahiro, Hidenori, Murawaki, Keisuke, Saiki, Kazuhiko, Yamamoto, Tetsuya, Yamaura, Hiroyuki
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 30.08.2007; Elsevier Science
• Subjects: Carbon monoxide; Catalysis; Chemistry; Copper; Exact sciences and technology; General and physical chemistry; Supported catalyst; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry; Water–gas shift reaction; Zinc oxide; Zinc oxide; Carbon monoxide; Water–gas shift reaction; Copper; Supported catalyst; Heterogeneous catalysis; Water gas; Water-gas shift reaction; Transition metal; Low temperature; Environmental protection
• ISSN: 0920-5861; 1873-4308
• DOI: 10.1016/j.cattod.2007.06.020

This paper presents a study on the influence of support (Al 2O 3, MgO, SiO 2-Al 2O 3, SiO 2-MgO, β-zeolite, and CeO 2) of Cu-ZnO catalysts for the low-temperature water–gas shift reaction. Supported Cu-ZnO catalysts were prepared by the conventional impregnation method, followed by the H 2 reduction. The activity of Cu-ZnO catalysts for the water–gas shift (WGS) reaction was largely influenced by the kind of support; Cu-ZnO catalysts supported on Al 2O 3, MgO, and CeO 2 showed high activity, while those on SiO 2-Al 2O 3, SiO 2-MgO and β-zeolite showed less activity in the temperature range 423–523 K. XRD analysis demonstrated that the copper species were highly dispersed on the supports used in the present study, except for a MgO support. TPR results of a series of supported CuO-ZnO catalysts suggest that the reducibility of CuO is one of the important factors controlling the activity of the WGS reaction over the supported catalysts.