Chinese Journal of Catalysis ›› 2023, Vol. 45: 162-173.DOI: 10.1016/S1872-2067(22)64176-7
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Feng Shaa,b, Shan Tanga,c, Chizhou Tanga,c, Zhendong Fenga,c, Jijie Wanga,*(), Can Lia,c,*(
)
Received:
2022-07-25
Accepted:
2022-09-17
Online:
2023-02-18
Published:
2023-01-10
Contact:
Jijie Wang, Can Li
Supported by:
Feng Sha, Shan Tang, Chizhou Tang, Zhendong Feng, Jijie Wang, Can Li. The role of surface hydroxyls on ZnZrOx solid solution catalyst in CO2 hydrogenation to methanol[J]. Chinese Journal of Catalysis, 2023, 45: 162-173.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(22)64176-7
Fig. 1. CO2 conversion and methanol selectivity (a), and methanol STY (b) over different catalysts. (c) Stability test of ZnZrOx-RA at 320 °C. Reaction conditions: 280-340 °C, 5 MPa, H2/CO2 = 3:1, and 24000 mL·gcat-1·h-1.
Fig. 2. CO2 conversion (a), methanol selectivity (b), and methanol STY (c) as a function of the molar ratio of H2/CO2 in the feed gas over ZnZrOx-RA catalyst. Reaction conditions: 260-340 °C, 5 MPa, and 24000 mL·gcat-1·h-1.
Fig. 3. CO2 conversion (a), methanol selectivity (b), and methanol STY (c) as a function of space velocity over ZnZrOx-RA catalyst. Reaction conditions: 290 °C, 5 MPa, H2/CO2=6:1, and 24000 mL·gcat-1·h-1.
Fig. 4. Arrhenius plot for CO2 hydrogenation to methanol (a) and the RWGS reaction (b), and dependence of methanol formation rate on H2 partial pressure (c) and CO2 partial pressure (d) over ZnZrOx-RA and ZnZrOx-CP catalysts.
Fig. 9. In situ DRIFT spectra of ZnZrOx-RA and ZnZrOx-CP in the range of 3200-2700 cm-1 under different atmosphere H2 + CO2 (a), H2 (b), and 1 MPa H2 (c), and variation of IR peak intensities of HCOO* (d), CH3O* (e), and dynamic change of the HCOO*/CH3O ratio (f) over ZnZrOx-RA and ZnZrOx-CP catalysts.
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