Method and system for synthesizing liquid hydrocarbon compounds

Abstract

Provided is a method for synthesizing liquid hydrocarbon compounds wherein synthesizing liquid hydrocarbon compounds from a synthesis gas by a Fisher-Tropsch synthesis reaction. The method includes a first absorption step of absorbing a carbon dioxide gas, which is contained in gaseous by-products generated in the Fisher-Tropsch synthesis reaction, with an absorbent, and a second absorption step of absorbing a carbon dioxide gas, which is contained in the synthesis gas, with the absorbent which is passed through the first absorption step.

1 - 7 . (canceled) 
     
     
         8 . A system for synthesizing liquid hydrocarbon compounds, comprising:
 a reactor configured to synthesize liquid hydrocarbon compounds from a synthesis gas containing carbon monoxide gas and hydrogen gas by a Fischer-Tropsch synthesis reaction;   a first absorption tower in which a first absorbent absorbs carbon dioxide gas contained in gaseous by-products generated in the reactor;   a second absorption tower in which a second absorbent absorbs a carbon dioxide gas included in the synthesis gas to be supplied to the reactor; and   a second supplying section through which the first absorbent discharged from the first absorption tower is supplied to the second absorption tower.   
     
     
         9 . The system for synthesizing liquid hydrocarbon compounds according to  claim 8 , further comprising
 a merging section configured to merge the gaseous by-products from which the carbon dioxide gas removed by the first absorbent in the first absorption tower into the synthesis gas from which the carbon dioxide gas removed by the second absorbent in the second absorption tower, and which is to be supplied to the reactor.   
     
     
         10 . The system for synthesizing liquid hydrocarbon compounds according to  claim 8 , further comprising
 a regeneration tower in which the carbon dioxide gas is stripped from the second absorbent discharged from the second absorption tower to regenerate the second absorbent.   
     
     
         11 . The system for synthesizing liquid hydrocarbon compounds according to  claim 10 , further comprising
 a first supplying section through which the second absorbent discharged from the regeneration tower is supplied to the first absorption tower to use as the first absorbent in the first absorption tower.   
     
     
         12 . (canceled) 
     
     
         13 . The system for synthesizing liquid hydrocarbon compounds according to  claim 12 , wherein
 the first supplying section includes a first supplying port of the absorbent which is connected to the second absorption tower and through which the absorbent is supplied to the second absorbent tower from the first absorption tower,   the second supplying section includes a second supplying port of the absorbent which is connected to the second absorption tower and through which the absorbent is supplied to the second absorbent tower from the regeneration tower, and   the second supplying port is located downstream in a flow of the synthesis gas in the second absorption tower with respect to the first supplying port on the second absorption tower.   
     
     
         14 . The system for synthesizing liquid hydrocarbon compounds according to  claim 8 ,
 wherein the second absorption tower is configured so that the synthesis gas flows in a direction opposite to the absorbent.