Reforming of CH4 with CO2 over Rh/H‐Beta: Effect of Rhodium Dispersion on the Catalytic Activity and Coke Resistance

Chinese Journal of Chemistry - Tập 28 Số 10 - Trang 1864-1870 - 2010
Linping Qian1, Bin Yue1, Yongming Zhang1, Li Zhang1, Lin Ye1, Jifang Cheng1, Shik Chi Edman Tsang2, Heyong He1
1Department of Chemistry, and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433, China
2Wolfson Catalysis Centre, Inorganic Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QR, UK

Tóm tắt

AbstractThe effect of Rh dispersion on reforming of CH4 with CO2 over H‐Beta supported Rh catalysts has been investigated. The CH4 and CO2 conversion over the catalysts increase with increasing Rh loading from 0.5 wt% to 4.0 wt% in the reaction temperature range of 823–1123 K. The high TOF of CH4 over 0.5 wt% and 1.0 wt% Rh/H‐beta may be attributed to high dispersion of rhodium species. The catalysts before and after the reaction were characterized by XRD, TEM, and TG‐DTA and the results indicate the catalysts with Rh loading of 0.5 wt% and 1.0 wt% exhibiting high resistance to coke. Under controllable conditions, we confirm that the coke is originated from methane dissociation and can be substantially oxidized by active oxygen species dissociated from the adsorbed carbon dioxide on the catalyst with high dispersion of Rh species.

Từ khóa


Tài liệu tham khảo

10.1016/0009-2509(88)80058-7

Gao Z. H., 2008, Acta Chim. Sinica, 66, 295

10.1038/352225a0

Fischer V. F., 1928, Brennstoff‐Chemie, 3, 39

10.1006/jcat.1993.1312

10.1007/BF02093437

10.1006/jcat.1996.0368

10.1007/BF00764080

10.1016/S1381-1169(99)00127-2

10.1006/jcat.1996.0005

10.1016/S0926-860X(96)00277-3

10.1016/0926-860X(96)00100-7

10.1016/S0926-860X(01)00974-7

10.1006/jcat.1998.2022

10.1016/j.cattod.2005.07.024

10.1016/S0926-860X(00)00547-0

10.1016/0926-860X(92)80004-V

10.1016/S0926-860X(97)00059-8

10.1007/BF00812144

10.1021/ie00106a005

10.1016/j.jcat.2003.09.030

10.1021/ie0496333

10.1016/S0926-860X(02)00591-4

10.1016/S0920-5861(98)00401-5

10.1081/CR-100101948

10.1016/S0360-0564(04)48004-3

10.1081/CR-120005742

10.1016/j.apcata.2005.05.018

10.1006/jcat.2000.2941

10.1016/S0920-5861(98)00465-9

10.1016/S0926-860X(00)00611-6

10.1016/S0926-860X(99)00486-X

10.1016/0166-9834(91)85081-6

10.1006/jcat.1996.0259

10.1006/jcat.1997.1609

10.1016/j.cattod.2006.06.010

Thông tin
Thông tin xuất bản

Chinese Journal of Chemistry

Tập 28 Số 10

1864-1870

Thông tin tác giả