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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

Title	Accumulation of the Carbonaceous Species on the Ni/Al₂O₃ Catalyst during CO₂ Reforming of Methane
Author	Jae-Hee Lee, Oh-Shim Joo, Young-Soon Baek, Yong Ho Yu, Kwang-Deog Jung
Keywords	CO₂ reforming, NiAl₂O₄ catalyst, Coke formation, TPO
Abstract	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.
Page	1623 - 0
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