✦ LIBER ✦

Investigation of simultaneous reaction of carbon monoxide and carbon dioxide with hydrogen on a commercial copper/zinc oxide catalyst

✍ Scribed by C. Kuechen; U. Hoffmann

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 765 KB
Volume: 48
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(93)80219-g

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✦ Synopsis

The kinetics of low-pressure methanol synthesis from CO, CO, and H, on a commercial Cu/ZnO catalyst was investigated in a Berty-type reactor at low overall conversion to reduce the influence of chemical equilibria (reaction conditions: p = 3-5 MPa, T = 483-543 K). At constant Hz partial pressure the ratio of CO to CO2 was varied. The results show that the rate of methanol production depends strongly on the age of the catalyst and less strongly on the feed composition. The fresh catalyst gives a maximum rate with an H, : CO: CO, ratio of 70: 28: 2. whereas the deactivated catalvst aives maximum rates if a svnthesis gas with ratio 7O:O: 30 is used. The' activation energy of methanol-synthesis from CO2 and H2 is considerably lower than that from CO and H,. The experimental results shed useful light on three contradictory kinetic equations published in the past decade. INTRODUCDON CujZn-based catalysts are widely used in industrial methanol production. Synthesis gas containing H,, CO and CO2 as the main components is used in industrial processes. The following reactions are believed to take place: CO

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