Carbon deposition and gasification kinetics of used lanthanide-promoted Co-Ni/Al₂O₃ catalysts from CH₄ dry reforming

Title: Carbon deposition and gasification kinetics of used lanthanide-promoted Co-Ni/Al₂O₃ catalysts from CH₄ dry reforming
Creator: Foo, Say Yei; Cheng, Chin Kui; Nguyen, Tuan-Huy; Kennedy, Eric M.; Dlugogorski, Bogdan Z.; Adesina, Adesoji A.
Relation: Catalysis Communications Vol. 26, p. 183-188
Publisher Link: http://dx.doi.org/10.1016/j.catcom.2012.06.003
Publisher: Elsevier BV
Resource Type: journal article
Date: 2012
Description: The kinetics of both carbon deposition and removal on lanthanide-promoted Co-Ni/Al₂O₃ dry reforming catalysts were investigated. Carbon deposition rate decreased with temperature in the range, 923–1023 K. Catalyst regeneration (via TPR-TPO-TPR and TPO-TPR) may be adequately modelled by the geometrical contracting volume gas–solid reaction model. Lanthanide promotion resulted in lower coke formation due to interaction of the rare-earth oxide with the more reactive surface carbonaceous matter in redox reactions, while the amount of the less reactive deposited carbon pool remained similar in all catalysts. Although both regeneration schemes studied were able to completely remove all carbon, samples from the TPO-TPR regime experienced marginal sintering.
Subject: Co-Ni catalysts; dry reforming; lanthanide promotion; carbon deposition; gasification kinetics
Identifier: http://hdl.handle.net/1959.13/1319053
Identifier: uon:23773
Identifier: ISSN:1566-7367
Language: eng
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