@article{scholars18742, doi = {10.3390/pr11030719}, year = {2023}, note = {cited By 1}, volume = {11}, number = {3}, title = {The Activity and Stability of Promoted Cu/ZnO/Al2O3 Catalyst for CO2 Hydrogenation to Methanol}, journal = {Processes}, abstract = {Cu/ZnO/Al2O3 catalyst with the addition of tri-promoters (Mn/Nb/Zr) was investigated with respect to their catalytic activity and stability in a prolonged reaction duration in methanol synthesis. Spent catalysts were characterized using N2 adsorption-desorption, FESEM/EDX, TEM, N2O chemisorption, and XPS for their physicochemical properties. The catalyst longevity study was evaluated at two days, seven days, and 14 days at 300 {\^A}oC, 31.25 bar, 2160 mL/g.hr GHSV, and H2:CO2 at 10:1. The CO2 conversion and methanol yield decreased by about 5.7 and 7.7, respectively, when the reaction duration was prolonged to 14 days. A slight reduction in catalytic activity under prolonged reaction duration was found due to thermal degradation. {\^A}{\copyright} 2023 by the authors.}, keywords = {Carbon dioxide; Catalyst activity; Copper compounds; Methanol; Physicochemical properties; Syngas production; Zinc compounds, reductions; Activity; Adsorption/desorption; Cu/ZnO/al2O3 catalyst; Methanol synthesis; N 2 adsorption; Physicochemical property; Prolonged reaction; Spent catalyst; ]+ catalyst, Aluminum compounds}, url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85151445810&doi=10.3390\%2fpr11030719&partnerID=40&md5=f3e5a40493695f992b6a71a6797173fc}, author = {Berahim, N. H. and Zabidi, N. A. M. and Ramli, R. M. and Suhaimi, N. A.} }