Catalyst and process for converting carbon oxide into methanol

Abstract

A catalyst for converting carbon oxide into methanol is provided. The catalyst includes 40-60 parts by weight of Cu, 25-40 parts by weight of Zn, 2-15 parts by weight of Al, 0.1-3 parts by weight of Si, and a metal. The metal includes Pd or Au, and the Pd and the Au are independently 0.1 wt %-5 wt %, based on the total weight of Cu, Zn, Al, and Si in the catalyst.

What is claimed is: 
     
         1 . A catalyst for converting carbon oxide into methanol, comprising:
 40-60 parts by weight of Cu;   25-40 parts by weight of Zn;   2-15 parts by weight of Al;   0.1-3 parts by weight of Si; and   a metal, wherein the metal comprises Pd or Au, and the Pd and the Au are independently 0.1-5 wt % based on total weight of Cu, Zn, Al, and Si in the catalyst.   
     
     
         2 . The catalyst for converting carbon oxide into methanol as claimed in  claim 1 , wherein the carbon oxide comprises CO 2 , CO, or a combination thereof. 
     
     
         3 . The catalyst for converting carbon oxide into methanol as claimed in  claim 1 , wherein the Pd and the Au are independently 0.25-1 wt % based on the total weight of Cu, Zn, Al, and Si in the catalyst. 
     
     
         4 . A process for converting carbon oxide into methanol, comprising:
 putting the catalyst as claimed in  claim 1  into a fixed bed reactor; and   introducing a gas mixture of hydrogen and the carbon oxide into the fixed bed reactor, and performing a hydrogenation reaction under the effect of the catalyst to form the methanol.   
     
     
         5 . The process for converting carbon oxide into methanol as claimed in  claim 4 , wherein the carbon oxide comprises CO 2 . 
     
     
         6 . The process for converting carbon oxide into methanol as claimed in  claim 4 , wherein the hydrogenation reaction further forms CO and water. 
     
     
         7 . The process for converting carbon oxide into methanol as claimed in  claim 4 , wherein the hydrogenation reaction is performed at a gas hourly space velocity of 3600-20000 h −1 . 
     
     
         8 . The process for converting carbon oxide into methanol as claimed in  claim 4 , wherein the hydrogenation reaction is performed at a temperature of 180-250° C. 
     
     
         9 . The process for converting carbon oxide into methanol as claimed in  claim 4 , wherein the hydrogenation reaction is performed under a pressure of 30-80 kg/cm 2 . 
     
     
         10 . The process for converting carbon oxide into methanol as claimed in  claim 4 , wherein a molar ratio of the hydrogen to the carbon oxide is 3/1 to 10/1.