METHOD AND APPARATUS FOR SEQUESTERING CARBON DIOXIDE FROM A SPENT GAS

摘要

A METHOD AND APPARATUS FOR SEQUESTERING CARBON DIOXIDE FROM A WASTE GAS AND REUSING IT AS A RECYCLED GAS WITHOUT EMISSIONS CONCERNS, INCLUDING: GIVEN A GAS SOURCE DIVIDED INTO A PROCESS GAS AND A WASTE GAS: MIXING THE PROCESS GAS WITH A HYDROCARBON AND FEEDING A RESULTING FEED GAS INTO A REFORMER (24) FOR REFORMING THE FEED GAS AND FORMING A REDUCING GAS; AND FEEDING AT LEAST A PORTION OF THE WASTE GAS INTO A CARBON DIOXIDE SCRUBBER (28) FOR REMOVING AT LEAST SOME CARBON DIOXIDE FROM THE WASTE GAS AND FORMING A CARBON DIOXIDE LEAN GAS THAT IS MIXED WITH THE REDUCING GAS. OPTIONALLY, THE METHOD ALSO INCLUDES FEEDING AT LEAST A PORTION OF THE WASTE GAS INTO THE CARBON DIOXIDE SCRUBBER (28) FOR REMOVING AT LEAST SOME CARBON DIOXIDE FROM THE WASTE GAS AND FORMING A FUEL GAS AFTER THE ADDITION OF A HYDROCARBON THAT IS FED INTO THE REFORMER (24). OPTIONALLY, THE GAS SOURCE AND THE REDUCING GAS ARE ASSOCIATED WITH A DIRECT REDUCTION PROCESS FOR CONVERTING IRON OXIDE TO METALLIC IRON IN A REDUCTION FURNACE THAT UTILIZES THE REDUCING GAS, OPTIONALLY AFTER SOME MODIFICATION, AND PRODUCES THE GAS SOURCE.