Accumulation of the Carbonaceous Species on the Ni/Al2O3 Catalyst during CO2 Reforming of Methane

Bulletin of the Korean chemical society

Oh-Shim Joo¹  Kwang-Deog Jung¹  Young-Soon Baek¹  Jae-Hee Lee¹  Yong Ho Yu¹ 

关键词: CO2 reforming;    NiAl2O4 catalyst;    Coke formation;    TPO;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The dependency of the rate of CO₂ reforming of methane on the catalyst loading and the reactor size was examined at a fixed temperature of 750 �? and a fixed GHSV of 18000 mL(STP)/g_cat.h. The conversion of methane in CO₂ reforming decreased with increase in the reactor size. The catalyst was severely deactivated with increase in the catalyst amount. The amount of carbonaceous species combustible below 550 �?, determined by TPO experiments with the used catalyst samples increased with increase in the catalyst amount, which was again confirmed by XRD and TEM experiments. The increase of the carbonaceous species combustible below 550 �? may be due to the suppression of the reverse Boudouard reaction, since the CO₂ reforming of methane, a highly endothermic reaction, resulted in lowering the reaction temperature.

【 授权许可】

Unknown