Patent ID: 6090356
Filing Date: 2000-07-18
Classification: C01B,C10K,C10L,Y02E,Y02P

Abstract:
An integrated process for the separation, recovery and utilization of acidic gases comprising H.sub.2 S, COS and CO.sub.2 contained in a raw synthesis gas produced from the high pressure partial oxidation of a hydrocarbonaceous reactant, comprising:(a) contacting the raw synthesis gas with a first liquid solvent in a first acidic gas removal unit to selectively absorb and remove at least a portion of the acidic gas from the raw synthesis gas and produce a purified synthesis gas;(b) selectively removing CO.sub.2 from the first liquid solvent by stripping the liquid solvent with N.sub.2 in a CO.sub.2 stripper to selectively remove the CO.sub.2 and form a first CO.sub.2 -rich nitrogen gaseous mixture and a first solvent residue containing H.sub.2 S and COS, wherein the pressure of the liquid solvent is reduced prior to entering the stripper;(c) purifying the first solvent residue containing H.sub.2 S and COS to recover the sulfur values;(d) purifying the first CO.sub.2 -rich nitrogen gaseous mixture by contacting it with a second liquid solvent in a second acidic gas removal unit to remove residual H.sub.2 S and COS and to produce a purified CO.sub.2 -rich nitrogen gaseous mixture and a second solvent residue containing H.sub.2 S and COS; and(e) introducing the purified CO.sub.2 -rich nitrogen gaseous mixture without further compression into a combustion turbine to produce power, wherein it is contacted with the purified synthesis gas and serves as a moderator during the combustion of said synthesis gas.