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Liquid phase carbon monoxide shift process.

Patent Number: EP0321739, A3

Publication date: 1989-06-28

Inventor(s): Hsiung Thomas Hsiao-Ling; Moore Robert Byron; Weimer Robert Fredrick

Applicant(s): Air Prod & Chem (US)

Requested Patent: JP1188403

Application Number: EP19880119807 19881128

Priority Number(s): US19870127829 19871202

IPC Classification: C01B3/06; C01B3/12

EC Classification: C01B3/06, C01B3/12

Equivalents: AU2631588, CA1333661


The present invention relates to a water-gas shift process which is carried out in a liquid medium, either in an ebullated or slurry mode. Heat liberated by the shift reaction is effectively removed by the liquid present thereby allowing for better performance and longer catalyst life. The process, termed "liquid phase shift" (LPS) preferably uses commercially available vapor-phase low temperature shift (LTS) catalysts to accomplish the shift reaction. Because of the isothermality of the LPS process and its ability therefore to take advantage of higher catalyst activity, the average operating temperature is typically 260oC (500oF). This compares favorably to the lower average operating temperature for the conventional vapor-phase LTS process, which is typically 240oC (465oF). In addition, the LPS process can handle high carbon monoxide content feeds, e.g. 75 vol% carbon monoxide on a dry basis, without experiencing excessive catalyst deactivation. High carbon monoxide content feeds cannot be handled by convention LTS processing.