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Method and Device for Reprocessing CO2 Containing Exhaust Gases

  • US 20110094159A1
  • Filed: 12/18/2008
  • Published: 04/28/2011
  • Est. Priority Date: 12/20/2007
  • Status: Active Grant
First Claim
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1. A method for reprocessing CO2-containing exhaust gases in a multi-stage reduction process, characterized in that the CO2-containing waste gas is conducted in a solid mass flow of bulk material, which cannot be gasified, and a thermally decomposable organic mass, through a plurality of zones as far as a pressure compensation area and in the process is converted to pyrolysis gases, wherein, in the flow direction of the solid mass flow,a. the organic mass is thermally decomposed under reducing conditions to form short-chain hydrocarbons, hydrogen and carbon monoxide, along with the creation of coke and a residue,b. oxidation of the coke is performed in an intermediate state at an increasing temperature, in which the carbon monoxide being created is drawn off opposite the direction of the solid mass flow in the direction of the combustion gas generating stage,c. remaining coke residue is converted, together with carbon dioxide, in a carbon monoxide generating stage at 800 to 1,600°

  • C. to carbon monoxide while adjusting the pressure and temperature in accordance with the Boudouard equilibrium,d. solid residue materials and coarse pieces of bulk material are cooled in a cooling stage in the CO2 counterflow to below 100°

    C. and are moved out,e. at least the removed bulk material is returned into the circulation after having been taken out.

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