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Production and recovery of hydrogen and carbon monoxide

  • US 4,836,833 A
  • Filed: 02/17/1988
  • Issued: 06/06/1989
  • Est. Priority Date: 02/17/1988
  • Status: Expired due to Fees
First Claim
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1. The method for individual recovery of hydrogen and carbon monoxide each at high purity, from a contaminated gas mixture containing these in association with carbon dioxide and methane, which comprises:

  • passing the gas mixture at superatmospheric pressure through a bed of solid adsorbent selective in adsorptive retention of carbon dioxide while discharging from said bed the unadsorbed primary effluent;

    purifying said primary effluent by treatments, in either order of sequence, comprising;

    (a) pressure swing adsorption and (b) selective permeation through a system comprised of one or more semi-permeable membranes, thereby recovering hydrogen as a permeate stream separated from a non-permeate stream rich in carbon monoxide, said hydrogen stream having a purity of at least 99 mol% H2 and said non-permeate stream comprising at least about 85 mol% CO.

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