CeZrOx Promoted Water-Gas Shift Reaction under Steam–Methane Reforming Conditions on Ni-HTASO5

Catalysts

Ye Wang¹  Guiying Li²  Changwei Hu²  Qing Zhao² 

[1] College of Chemical Engineering, Sichuan University, Chengdu 610065, China;Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China;

关键词: steam-methane reforming;    water-gas shift reaction;    CeZrO_x;    hydrogen;    carbon deposition;   

DOI  :  10.3390/catal10101110

来源: DOAJ

【 摘 要 】

Ni-based catalysts (Ni-γ-Al₂O₃, Ni-HTASO5 and Ni-CeZrO_x) were prepared by impregnation method and characterized by BET, AAS, XRD, H₂-TPR, CO-TPD, NH₃-TPD, XPS, TG-DSC-MS and Raman spectroscopies. Using CeZrO_x-modified Al₂O₃ (HTASO5) as support, the catalyst exhibited good catalytic performance (TOF_CH4 = 8.0 × 10⁻² s⁻¹, TOF_H2 = 10.5 × 10⁻² s⁻¹) and carbon resistance for steam-methane reforming (SMR) reaction. Moreover, CeZrO_x was able to enhance water-gas shift (WGS) reaction for more hydrogen production. It was found that the addition of CeZrO_x could increase the content of active nickel precursor on the surface of the catalyst, which was beneficial to the decomposition of water and methane on Ni-HTASO5. Furthermore, Ni-HTASO5 could decrease the strong acid sites of the catalyst, which would not only contribute to the formation of low graphited carbon, but also decrease the amount of carbon deposition.

【 授权许可】

Unknown