Patent ID: 8501135
Filing Date: 2013-08-06
Classification: B01D,C01B,Y02P

Abstract:
1. A method of reducing the amount of sulfur compounds in an incoming gas stream and producing a CO 2 stream of high purity, the method comprising: i. providing a guard bed containing an hydrolysis catalyst for the conversion of COS and CS ii. flowing said incoming gas stream through said guard bed to produce an effluent stream; iii. providing an acidic gas removal unit comprising an absorbent suitable for acidic gas absorption; iv. flowing said effluent stream from the guard bed over said absorbent in the acidic gas removal unit to produce a stream that is free of acidic gases, said absorbent becoming rich in acidic gases, v. applying an acidic-gas desorption mode to said acidic-gas rich absorbent to produce an acidic gas stream rich in acidic gases; vi. introducing oxygen to said acidic gas-rich stream; vii. providing a direct oxidation vessel containing a catalytic reaction zone comprising a catalyst suitable for catalyzing the oxidation of the H viii. flowing said acidic gas-rich stream over said catalyst to produce a processed stream comprises a reduced level of said sulfur compounds when compared to the incoming effluent; and ix. recycling at least a portion of said processed stream of reduced sulfur compounds back to said guard bed and acidic gas removal unit.