Citation:
GUO Peng-fei, JIN Guo-qiang, GUO Cong-xiu, WANG Ying-yong, TONG Xi-li, GUO Xiang-yun. Effects of Yb2O3 promotor on the performance of Ni/SiC catalysts in CO2 reforming of CH4[J]. Journal of Fuel Chemistry and Technology,
;2014, 42(6): 719-726.
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Ni/SiC and Ni-Ybx/SiC (x=2%, 4%, 6%,10%) catalysts were prepared by the impregnation method, and the performances of catalysts in the carbon dioxide reforming of methane were studied in a fixed-bed reactor.The catalysts were characterized by BET, ICP-AES, XRD, H2-TPR, TG-DTA, XPS and TEM techniques.The experimental results indicate that the appropriate addition amount of Yb is 4% to 6%.Ni-Yb4/SiC and Ni-Yb6/SiC catalysts exhibit excellent catalytic activity and stability at 800 ℃, and the conversion of CH4 and CO2 can be maintained over 90% during the 100 h testing. Yb2O3 promotor can inhibit the growth of nickel nanoparticles and reduce the amount of carbon deposition,therefore Ni-Yb/SiC catalysts show stable activity in the continuous reforming reaction.
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Keywords:
- CO2 reforming of CH4,
- Ni-Yb/SiC catalyst,
- promotor,
- stability
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