Cu0·1In0·01/S-1 catalysts with high efficiency towards methanol steam reforming.

Cu 0·1 /S-1, Cu 0·1 Zn 0·01 /S-1, Cu 0.1 In x /S-1 (x = 0.01, 0.03, 0.05) and Cu 0·1 Ce 0·01 /S-1 were successfully prepared with S-1 as the carrier material and applied to methanol steam reforming (MSR) reaction. To further explore its chemical and physical properties, XRD, BET, SEM-EDS, ICP, FTIR, H 2 -TPR, NH 3 -TPD, CO 2 -TPD, and Raman were used to characterize the synthetic S-1 zeolite catalysts. The measured physicochemical properties revealed that utilizing S-1 zeolite as the carrier effectively altered the size of the metal particles, enhancing their dispersion and reduction characteristics. Compared with five different types of S-1 zeolite catalysts, the Cu 0·1 In 0·01 /S-1 catalyst has a large specific surface area and pore size. It exhibited superior active metal dispersion, with the lowest reduction temperature for the active metal CuO. The catalyst also showed a high Lewis acid content on its surface, forming the In-Lewis acid site. Consequently, the Cu 0·1 In 0·01 /S-1 catalyst exhibits exceptional performance in methanol steam reforming for hydrogen production reactions. It exhibited the best performance with a methanol conversion rate of 100%, H 2 selectivity of 100% under the conditions of 1 MPa, 250 °C, the S/C molar ratio of 2.5, and the WHSV of 0.5 h−1, which outperforms most of the reported catalysts in methanol steam reforming. © 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. [Display omitted] • Cu 0 · 1 In 0 · 01 /S- 1 catalyst was prepared by wet impregnation method and applied to MSR reaction. • The synthesis method which In was employed as a promotor significantly improved the catalytic activity during MSR. • Excellent catalytic performance was achieved with methanol conversion of 100% and H 2 selectivity of 100% at 250 °C. [ABSTRACT FROM AUTHOR]