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Experimental investigation of the catalytic cracking of methane over a supported Ni catalyst
Author(s) -
Hazra M.,
Croiset E.,
Hudgins R. R.,
Silveston P. L.,
Elkamel A.
Publication year - 2009
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.20087
Subject(s) - catalysis , methane , whisker , hydrogen , cracking , chemical engineering , carbon fibers , materials science , fluid catalytic cracking , chemistry , metallurgy , composite material , organic chemistry , composite number , engineering
TGA experiments on the catalytic cracking of methane and methane diluted with hydrogen over a 5 wt% Ni/γ‐alumina catalyst at 500°C and 1 and 10 bar are described. Carbon deposition on the catalyst, as expressed in specific weight of carbon, varies with time. Eventually, the deposition stops because of deactivation. The specific weight at this point depends on the hydrogen partial pressure and there is also a weak dependence on the degree of contact between catalyst particles. A model based on assuming carbon deposition proceeds through whisker formation and growth, and deactivation occurs through encapsulation adequately describes the experimental observations up to 20 vol% hydrogen in the feed.