Next Article in Journal
Plasma-Assisted Selective Catalytic Reduction for Low-Temperature Removal of NOx and Soot Simulant
Previous Article in Journal
Application of Phase Transfer Catalysis in the Esterification of Organic Acids: The Primary Products from Ring Hydrocarbon Oxidation Processes
Open AccessArticle

Single and Dual Metal Oxides as Promising Supports for Carbon Monoxide Removal from an Actual Syngas: The Crucial Role of Support on the Selectivity of the Au–Cu System

1
Energy, Materials, and Environment Laboratory, Chemical Engineering Department, Universidad de La Sabana, Campus Universitario Puente del Común, Km. 7 Autopista Norte, Bogotá 250001, Colombia
2
Environmental Catalysis Research Group, Chemical Engineering Department, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín 050010, Colombia
*
Author to whom correspondence should be addressed.
Catalysts 2019, 9(10), 852; https://doi.org/10.3390/catal9100852
Received: 9 September 2019 / Revised: 8 October 2019 / Accepted: 10 October 2019 / Published: 13 October 2019
A catalytic screening was performed to determine the effect of the support on the performance of an Au–Cu based system for the removal of CO from an actual syngas. First, a syngas was obtained from reforming of ethanol. Then, the reformer outlet was connected to a second reactor, where Au–Cu catalysts supported on several single and dual metal oxides (i.e., CeO2, SiO2, ZrO2, Al2O3, La2O3, Fe2O3, CeO2-SiO2, CeO2-ZrO2, and CeO2-Al2O3) were evaluated. AuCu/CeO2 was the most active catalyst due to an elevated oxygen mobility over the surface, promoting CO2 formation from adsorption of C–O* and OH intermediates on Au0 and CuO species. However, its lower capacity to release the surface oxygen contributes to the generation of stable carbon deposits, which lead to its rapid deactivation. On the other hand, AuCu/CeO2-SiO2 was more stable due to its high surface area and lower formation of formate and carbonate intermediates, mitigating carbon deposits. Therefore, use of dual supports could be a promising strategy to overcome the low stability of AuCu/CeO2. The results of this research are a contribution to integrated production and purification of H2 in a compact system. View Full-Text
Keywords: CO-PROX; CO-SMET; CO2 methanation; hydrogen purification; process integration CO-PROX; CO-SMET; CO2 methanation; hydrogen purification; process integration
Show Figures

Graphical abstract

MDPI and ACS Style

Cifuentes, B.; Bustamante, F.; Cobo, M. Single and Dual Metal Oxides as Promising Supports for Carbon Monoxide Removal from an Actual Syngas: The Crucial Role of Support on the Selectivity of the Au–Cu System. Catalysts 2019, 9, 852.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop