Method for recycling carbon dioxide CO

• US 9,327,986 B2
• Filed: 01/17/2011
• Issued: 05/03/2016
• Est. Priority Date: 02/01/2010
• Status: Active Grant

• Current Assignee: SEE - Solucoes, Energia E Meio Ambiente, Ltda.
• Original Assignee: See-Solucoes Energia E MEIO Ambiente LTDA
• Inventors: Guyomarc'h, Raymond Franois
• Primary Examiner(s): Silverman, Stanley
• Assistant Examiner(s): Iqbal, Syed
• Application Number:
  US13/576,639
• Publication Number:
  US 20120304661A1
• Time in Patent Office: 1,933 Days
• US Class Current: 1/1
• CPC Class Codes: C01B 32/40 Carbon monoxide
• CPC Class Codes: C10J 2300/0916 Biomass
• CPC Class Codes: C10J 2300/092 Wood, cellulose
• CPC Class Codes: C10J 2300/093 Coal
• CPC Class Codes: C10J 2300/0946 Waste, e.g. MSW, tires, glass, tar sand, peat, paper, lignite, oil shale
• CPC Class Codes: C10J 2300/0969 Carbon dioxide
• CPC Class Codes: C10J 2300/1603 with gas treatment gas cleaning C10K1/00
• CPC Class Codes: C10J 3/22 Arrangements or dispositions of valves or flues
• CPC Class Codes: C10J 3/82 Gas withdrawal means

Abstract

The invention refers to a recycling process of a so-called gaseous flow (106) of CO₂ essentially containing molecules of CO₂, said process comprising the following steps:

• • heating of said gaseous flow of CO₂ at a pyrolysis temperature of the material containing carbon (104);
  • pyrolysis of a load of a carbon-containing material (104) containing elements of carbon by said gaseous flow, said pyrolysis reducing the molecules of CO₂ by said elements of carbon to produce a first gaseous flow (110) essentially containing molecules of carbon monoxide (CO) at high temperature;
  • oxidation of said molecules of carbon monoxide (CO) by elements of oxygen (O), said oxidation producing a second gaseous flow (114) essentially containing molecules of CO₂;
  • reduction of said molecules of CO₂ of said second gaseous flow (114), said reduction supplying a third gaseous flow (120) essentially containing molecules of carbon monoxide (CO).

It also refers to a system to perform such a process.

Claims

1. A process to recycle a gaseous flow (106) of CO₂, essentially comprising molecules of CO₂, said process comprising the following steps:

heating of said gaseous flow of CO₂ at a pyrolysis temperature of a carbon containing material in a range between 800 and 1100°

C.;

milling a load of the carbon containing material before the pyrolysis step;

pyrolysis of the load of the carbon-containing material by said gaseous flow, said pyrolysis reducing the CO₂ to produce the first gaseous flow essentially containing carbon monoxide (CO) at high temperature;

oxidation of said monoxide (CO) by oxygen (O) of the oxygen holding oxides, MeO, wherein Me is a metal, said oxidation producing a second gaseous flow essentially containing molecules of CO₂, wherein said oxygen holding oxides (MeO) are reduced (Me) after said oxidation;

reduction of said molecules of CO₂ of said second gaseous flow by the reduced oxygen holding oxides (Me) obtained after oxidation of carbon monoxide (CO), said reduction supplying a third gaseous flow essentially containing molecules of carbon monoxide (CO).

2. The process of claim 1, further comprising a starting phase during which the step of heating of said gaseous flow of CO₂ is performed by the combustion of a load of carbon containing material.

3. The process of claim 1, further comprising the recovery of at least a part of the thermal power of the second gaseous flow, being at least a part of said thermal power in the step of heating said gaseous flow of CO₂.

4. The process of claim 1, further comprising the recovery of at least a part of the thermal power of the third gaseous flow, being at least a part of said thermal power used in one or more of the step of heating said gaseous flow of CO₂ or to pre-heat the carbon containing material (104).

5. The process of claim 1, further comprising a continuous and counter current introduction of the carbon containing material and said gaseous flow of CO₂ in a pyrolysis zone, respecting the proportion of one mole of carbon (C) for one mole of carbon dioxide (CO₂).

6. The process of claim 1, further comprising the generation of electric energy or thermal power by combustion of at least a part of the third gaseous flow.