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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 24, Number 11
BKCSDE 24(11)
November 20, 2003 

Accumulation of the Carbonaceous Species on the Ni/Al2O3 Catalyst during CO2 Reforming of Methane
Jae-Hee Lee, Oh-Shim Joo, Young-Soon Baek, Yong Ho Yu, Kwang-Deog Jung
CO2 reforming, NiAl2O4 catalyst, Coke formation, TPO
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)/gcat.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.
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