Catalyst composition and catalytic processes for producing liquid hydrocarbons

Abstract

The invention relates to potassium-promoted, Fe 2+ (Fe 3+ y Al 3+ 1-y ) 2 O 4 [0.3≤y≤0.7] silica-containing extrudates, processes for the preparation of the extrudates with the aid of colloidal silica, and the use of the extrudates to catalyze processes for producing liquid hydrocarbons.

1 ) Potassium-promoted Fe 2+ (Fe 3+   y Al 3+   1-y ) 2 O 4  [0.3<y<0.7] silica-containing extrudates. 
     
     
         2 ) Potassium-promoted Fe 2+ (Fe 3+   y Al 3+   1-y ) 2 O 4  [0.3<y<0.7] silica-containing extrudates consisting of 45 to 85% by weight Fe 2+ (Fe 3+   y Al 3+   1-y ) 2 O 4 , 10-50% by weight SiO 2  and 3 to 10% by weight potassium. 
     
     
         3 ) Use of the extrudates defined in  claim 1  in the catalysis of hydrocarbons formation by a reaction selected from the group consisting of:
 reaction of carbon dioxide with hydrogen to produce hydrocarbons; 
 reaction of carbon monoxide with steam to produce hydrocarbons; and 
 conversion of h-lean syngas to hydrocarbons. 
 
     
     
         4 ) A process for producing hydrocarbons comprising hydrogenation of carbon dioxide-containing gas stream in the presence of the extrudates defined in  claim 1 , and collecting the liquid hydrocarbons formed. 
     
     
         5 ) A process for producing hydrocarbons comprising contacting carbon monoxide-containing gas stream with steam in the presence the extrudates defined in  claim 1 , and collecting the liquid hydrocarbons formed. 
     
     
         6 ) A process according to  claim 5 , wherein the carbon monoxide-containing gas stream comprises a mixture of CO 2  and CO, with a molar ratio CO 2 :CO being less than 0.25:1. 
     
     
         7 ) A process for preparing liquid hydrocarbons, comprising converting carbon monoxide and hydrogen-containing gas stream with a molar ratio H 2 /CO≤1 to hydrocarbons in the presence of the extrudates defined in  claim 1 , and collecting the liquid hydrocarbons formed. 
     
     
         8 ) A process for preparing liquid hydrocarbons according to  claim 7 , comprising converting carbon monoxide and hydrogen-containing gas stream with a molar ratio 0.51<H 2 /CO<0.8 to hydrocarbons in the presence the extrudates defined in  claim 1 , and collecting the liquid hydrocarbons formed. 
     
     
         9 ) A process for preparing liquid hydrocarbons according to  claim 7 , comprising converting carbon monoxide and hydrogen-containing gas stream with a molar ratio 0.01<H 2 /CO<0.51 mixed with steam in the presence of the extrudates defined in  claim 1 , and collecting the liquid hydrocarbons formed. 
     
     
         10 ) A process according to  claim 7 , wherein the carbon monoxide and hydrogen-containing gas stream used as feedstock is H 2 -lean syngas (H 2 /CO≤1), obtained by dry reforming of natural gas with carbon dioxide. 
     
     
         11 ) A process according to  claim 10 , further comprising adjusting the composition of the so-formed H 2 -lean syngas by subjecting the gaseous mixture to a reverse water gas shift reaction. 
     
     
         12 ) A process comprising dry reforming of natural gas with carbon dioxide to yield H 2 -lean syngas (H 2 /CO≤1), and converting said H 2 -lean syngas in the presence of a catalyst to hydrocarbons.