Process for the removal of carbon dioxide from a gas

Process for the removal of carbon dioxide from a gas

  • CN 102,065,978 A
  • Filed: 06/19/2009
  • Published: 05/18/2011
  • Est. Priority Date: 06/19/2008
  • Status: Active Application
First Claim
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1. one kind is used for from comprising CO 2Gas in remove CO 2Method, said method comprising the steps of:

  • (a) gas is contacted with the aqueous solution of one or more carbonate compounds, thereby make portion C O at least 2Reaction forms bicarbonate compound, and wherein the operating condition of absorber makes at least a portion bicarbonate compound form sediment, thereby forms the bicarbonate slurry;

    (b) make to small part bicarbonate slurry and carry out concentration step,, wherein concentrate the bicarbonate compound that back bicarbonate slurry contains 20-80wt% to obtain aqueous solution and to concentrate back bicarbonate slurry;

    (c) making at least, partially aqueous solution returns absorber;

    (d) make the bicarbonate slurry pressurization of concentrated back, to obtain the concentrated back of pressurization bicarbonate slurry;

    (e) will pressurize and concentrate back bicarbonate slurry and be transferred to regenerator system and apply heat from concentrate back carbonate slurry, to discharge CO 2Thereby, obtain to be rich in CO 2Gas stream and the carbonate logistics of regeneration back.

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