Integrated production of fuel gas and oxygenated organic compounds from synthesis gas

A method for producing fuel gas and a liquid product containing one or more oxygenated organic compounds from a synthesis gas comprising hydrogen, carbon monoxide, carbon dioxide, and one or more sulfur-containing compounds, said method comprising:

• a) contacting a portion of said synthesis gas in an absorber system with an absorber liquid feed comprising one or more of said oxygenated organic compounds, wherein at least a portion of said one or more sulfur-containing compounds and carbon dioxide is physically absorbed by said absorber liquid feed, and withdrawing therefrom a treated synthesis gas having a reduced concentration of said sulfur-containing compounds and carbon dioxide, and an absorber effluent stream containing absorbed sulfur-containing compounds and carbon dioxide;
• b) reacting said treated synthesis gas in a catalytic reactor system to yield a reactor system liquid effluent comprising said one or more oxygenated organic compounds and a stream of unreacted synthesis gas, wherein at least a portion of said reactor system liquid effluent is utilized as said absorber liquid feed;
• c) stripping said absorbed sulfur-containing compounds and carbon dioxide from said absorber effluent stream by contacting the stream with at least a portion of said unreacted synthesis gas in a stripper system, and withdrawing therefrom a regenerated liquid and a stripper offgas comprising unreacted synthesis gas, carbon dioxide, and sulfur-containing compounds;
• d) withdrawing a portion of said regenerated liquid as said liquid product;
• e) combining another portion of said regenerated liquid with said absorber liquid feed prior to said absorber system;
• and
• f) combining said stripper offgas and the remaining portion of said synthesis gas to yield said fuel gas.

A method for producing fuel gas and a liquid product containing one or more oxygenated organic compounds from a synthesis gas comprising hydrogen, carbon monoxide, carbon dioxide, and one or more sulfur-containing compounds, said method comprising:

• a) contacting a portion of said synthesis gas in an absorber system with an absorber liquid feed comprising one or more of said oxygenated organic compounds, wherein at least a portion of said one or more sulfur-containing compounds and carbon dioxide is physically absorbed by said absorber liquid feed, and withdrawing therefrom a treated synthesis gas having a reduced concentration of said sulfur-containing compounds and carbon dioxide, and an absorber effluent stream containing absorbed sulfur-containing compounds and carbon dioxide;
• b) reacting said treated synthesis gas in a catalytic reactor system to yield a reactor system liquid effluent comprising said one or more oxygenated organic compounds and a stream of unreacted synthesis gas, wherein at least a portion of said reactor system liquid effluent is utilized as said absorber liquid feed;
• c) stripping said absorbed sulfur-containing compounds and carbon dioxide from said absorber effluent stream by contacting the stream with at least a portion of said unreacted synthesis gas in a stripper system, and withdrawing therefrom a regenerated liquid and a stripper offgas comprising unreacted synthesis gas, carbon dioxide, and sulfur-containing compounds;
• d) withdrawing a portion of said regenerated liquid as said liquid product;
• e) combining another portion of said regenerated liquid with said absorber liquid feed prior to said absorber system;
• and
• f) combining said stripper offgas and the remaining portion of said synthesis gas to yield said fuel gas.

A method for producing fuel gas and a liquid product containing one or more oxygenated organic compounds comprising:

• a) separating air in an air separation system at a pressure between 70 and 300 psig to yield oxygen and nitrogen products;
• b) gasifying a carbonaceous feedstock at a pressure between 200 and 1300 psig in a partial oxidation or a steam-oxygen gasification system using said oxygen product as an oxidant to produce a synthesis gas comprising hydrogen, carbon monoxide, carbon dioxide, and one or more sulfur-containing compounds;
• c) contacting a portion of said synthesis gas in an absorber system with an absorber liquid feed comprising one or more of said oxygenated organic compounds, and withdrawing therefrom a treated synthesis gas having a reduced concentration of said sulfur-containing compounds and carbon dioxide, and an absorber effluent stream containing absorbed sulfur-containing compounds and carbon dioxide;
• d) reacting said treated synthesis gas in a catalytic reactor system to yield a reactor system liquid effluent comprising said one or more oxygenated organic compounds and a stream of unreacted synthesis gas;
• e) stripping said absorbed sulfur-containing compounds and carbon dioxide from said absorber effluent stream by contacting the stream with at least a portion of said nitrogen product in a stripper system, and withdrawing therefrom a regenerated liquid stream and a stripper offgas comprising nitrogen, carbon dioxide, and sulfur-containing compounds;
• f) combining said regenerated liquid stream with a portion of said reactor system liquid effluent to provide said absorber liquid feed;
• g) withdrawing another portion of said reactor system liquid effluent as said liquid product;
• and
• h) combining said stripper offgas and the remaining portion of said synthesis gas to yield said fuel gas.

A method for producing a fuel gas product and a liquid fuel product containing one or more oxygenated organic compounds from a synthesis gas comprising hydrogen, carbon monoxide, carbon dioxide, and one or more sulfur-containing compounds, said method comprising:

• a) contacting a portion of said synthesis gas in an absorber system with an absorber liquid feed comprising one or more of said oxygenated organic compounds, wherein at least a portion of said one or more sulfur-containing compounds and carbon dioxide is physically absorbed by said absorber liquid feed, and withdrawing therefrom a treated synthesis gas having reduced concentrations of said sulfur-containing compounds and carbon dioxide, and an absorber effluent stream containing absorbed sulfur-containing compounds and carbon dioxide at a superatmospheric pressure;
• b) reacting said treated synthesis gas in a catalytic reactor system to yield a reactor system liquid effluent comprising said one or more oxygenated organic compounds and a stream of unreacted synthesis gas, and utilizing said reactor system liquid effluent as said absorber liquid feed;
• c) combining said stream of unreacted synthesis gas with the remaining portion of said synthesis gas to provide said fuel gas product;
• and
• d) withdrawing said absorber effluent stream to provide said liquid fuel product at said superatmospheric pressure.