Release Time:2019-03-09  Hits:

Indexed by: Journal Papers

Date of Publication: 2015-12-01

Journal: CATALYSTS

Included Journals: Scopus、SCIE

Volume: 5

Issue: 4

Page Number: 1846-1861

ISSN: 2073-4344

Key Words: methanol synthesis; CO2 conversion; synergetic effect; medium basic site; citrate method

Abstract: A series of CuO/ZnO/ZrO2 (CZZ) catalysts with different CuO/ZnO weight ratios have been synthesized by citrate method and tested in the catalytic hydrogenation of CO2 to methanol. Experimental results showed that the catalyst with the lowest CuO/ZnO weight ratio of 2/7 exhibited the best catalytic performance with a CO2 conversion of 32.9%, 45.8% methanol selectivity, and a process delivery of 193.9 g(MeOH)center dot kg(cat)(-1).h(-1). A synergetic effect is found by systematic temperature-programmed-desorption (TPD) studies. Comparing with single and di-component systems, the interaction via different components in a CZZ system provides additional active sites to adsorb more H-2 and CO2 in the low temperature range, resulting in higher weight time yield (WTY) of methanol.