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Process for separating and recovering carbonic acid gas from gas mixture by adsorption

  • US 4,986,835 A
  • Filed: 08/23/1989
  • Issued: 01/22/1991
  • Est. Priority Date: 12/26/1987
  • Status: Expired due to Term
First Claim
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1. A process for separating and recovering a high purity carbonic acid gas from a wet mixed gas containing carbonic acid gas according to a pressure swing adsorption and separation method which comprises using a pressure swing adsorption and separation apparatus having at least three adsorbers, each of which is paced with alumina gel and zeolite, comprising the steps of:

  • providing the amount of carbonic acid gas in a feeding raw material gas at least 8% by volume;

    providing the alumina gel at a composition of 20 to 50% by weight of Al2 O3 and 80 to 50% by weight of SiO2, and packed at a feeding gas inlet side of the adsorber;

    providing a 10A type zeolite packed at the downstream side of the adsorber;

    providing a packing volume ratio of the alumina gel to zeolite of between 1;

    10 and 1;

    2; and

    carrying out the steps of adsorption, washing, desorption and pressurization in each adsorber in one operation sequence.

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