Author, as appears in the article.: Phey, MLP; Abdullah, TAT; Ali, UFM; Mohamud, MY; Ikram, M; Nabgan, W
Department: Enginyeria Química
URV's Author/s: Nabgan, Walid
Keywords: Performance Optimization Methanol synthesis Deactivation Cu-zno Conversion Co2 hydrogenation Clay Carbon-dioxide Adsorption
Abstract: The catalytic conversion of CO(2)via the Reverse Water Gas Shift (RWGS) reaction for CO production is a promising environment-friendly approach. The greenhouse gas emissions from burning fossil fuels can be used to produce valuable fuels or chemicals through CO2 hydrogenation. Therefore, this project was to study the CO2 conversion via RWGS over various Cu/ZnO catalysts supported by regenerated spent bleaching earth (RSBE) prepared by wet impregnation technique with different Cu : Zn ratios (0.5, 1.0, 1.5, 2.0, 3.0). The causes of environmental pollution from the disposal of spent bleaching earth (SBE) from an edible oil refinery can be eliminated by using it as catalyst support after the regeneration process. The synthesized catalysts were characterized by thermogravimetric analysis (TGA), X-ray diffraction (XRD), temperature-programmed reduction of hydrogen (TPR-H-2), pyridine-adsorbed Fourier transform infrared (FTIR-pyridine), temperature programmed desorption of carbon dioxide (TPD-CO2), N-2 physisorption, and Fourier transform infrared (FTIR) analysis. The RWGS reaction was carried out in a slurry reactor at 200 degrees C, with a pressure of 3 MPa, a residence time of 4 h, and catalyst loading of 1.0 g with an H-2/CO2 ratio of 3. According to experimental data, the Cu/Zn ratio significantly impacts the catalytic structure and performance. The catalytic activity increased until the Cu : Zn ratio reached the maximum value of 1.5, while a further increase in Cu/Zn ratio inhibited the catalytic performance. The CZR3 catalyst (Cu/Zn ratio of 1.5) with a higher catalytic reducibility, high copper dispersion with small crystalline size, lower total pore volume as well as higher basicity showed superior catalytic performance in terms of CO2 conversion (40.67%) and CO yield (39.91%). Findings on the effect of reaction conditions revealed that higher temperature (>240 degrees C), higher pressure (>3 MPa), higher reaction time (>4 h) and higher catalyst loading (>1.25 g) could improve CO2 conversion to CO yield. A maximum CO2 conversion of 45.8% and multiple recycling stability of the catalyst were achieved, showing no significant decrease in CO2 conversion.
Thematic Areas: Zootecnia / recursos pesqueiros Saúde coletiva Química Odontología Medicina veterinaria Medicina iii Medicina ii Medicina i Materiais Interdisciplinar Geociências General chemistry General chemical engineering Farmacia Ensino Engenharias iv Engenharias iii Engenharias ii Engenharias i Economia Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Chemistry, multidisciplinary Chemistry (miscellaneous) Chemistry (all) Chemical engineering (miscellaneous) Chemical engineering (all) Biotecnología Biodiversidade Astronomia / física
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: walid.nabgan@urv.cat
Author identifier: 0000-0001-9901-862X
Record's date: 2024-08-03
Papper version: info:eu-repo/semantics/publishedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Rsc Advances. 13 (5): 3039-3055
APA: Phey, MLP; Abdullah, TAT; Ali, UFM; Mohamud, MY; Ikram, M; Nabgan, W (2023). Reverse water gas shift reaction over a Cu/ZnO catalyst supported on regenerated spent bleaching earth (RSBE) in a slurry reactor: the effect of the Cu/Zn ratio on the catalytic activity. Rsc Advances, 13(5), 3039-3055. DOI: 10.1039/d2ra07617a
Entity: Universitat Rovira i Virgili
Journal publication year: 2023
Publication Type: Journal Publications
Repositori URV