✦ LIBER ✦

Carbon dioxide reforming of methane to synthesis gas over supported Ni catalysts

✍ Scribed by Z.L. Zhang; X.E. Verykios

Publisher: Elsevier Science
Year: 1994
Tongue: English
Weight: 451 KB
Volume: 21
Category: Article
ISSN: 0920-5861
DOI: 10.1016/0920-5861(94)80183-5

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✦ Synopsis

Carbon dioxide reforming of methane to synthesis gas has been investigated over supported Ni catalysts in the temperature range of 5004350°C. Addition of CaO ( 10 mol%) promoter to the Nil y-A1203 resulted in an increase of reaction rate and an improvement of catalyst stability, which may be related to enhanced reducibility of the promoted catalyst. The kinetic studies show that the overall reaction can be described by a Langmuir-Hinshelwood mechanistic scheme, assuming that methane dissociation is the rate determining step. In addition to adsorbed CO and formate species, three types of carbonaceous species, C,, C, and C, were found to exist on the Ni catalyst. While the active C, species is suggested to be responsible for CO formation, the less active C, and C, species are attributed to causing catalyst deactivation.

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