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Performance of combined cobalt—nickel—zirconia and HZSM‐5 catalyst systems for carbon monoxide hydrogenation
Author(s) -
Varma R. L.,
Bakhshi N. N.,
Mathews J. F.,
Ng S. H.
Publication year - 1985
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.5450630413
Subject(s) - catalysis , cobalt , bifunctional , carbon monoxide , nickel , cubic zirconia , zeolite , chemistry , carbon fibers , inorganic chemistry , bifunctional catalyst , metal , space velocity , selectivity , materials science , organic chemistry , composite material , ceramic , composite number
The synthesis of hydrocarbons via hydrogenation of carbon monoxide was investigated over cobalt—nickel—zirconia catalysts of various compositions in combination with zeolite HZSM‐5 in “mixed bed” and “follow bed” arrangements. These combinations resulted in the formation of aromatics in amounts as high as 30‐35 wt% under relatively mild operating conditions (1 atm, 250–280°C). Although the olefinicity of C 2 and C 3 fractions in the product stream was higher in the mixed bed compared to the follow bed arrangement, the selectivities to aromatics were comparable in the two bed arrangements. The aromatic selectivity was found to be sensitive to operating conditions. The formation of aromatics was favored at high HZSM‐5/metal catalyst ratios, low space velocities and high reaction temperatures. The product distributions obtained using various metal/zeolite bifunctional catalysts have been discussed.