Identify the catalyst used in following reaction at 500^ C ? CO + H ₂ O CO ₂+ H ₂

Step-by-step solution

The water-gas shift reaction is CO ( g ) + H ₂ O ( g ) CO ₂( g ) + H ₂( g ) , used to produce hydrogen gas from carbon monoxide and steam. Catalyst selection depends on operating temperature. At high temperatures around 500^ C , the catalyst is an iron-chromium oxide mixture, denoted Fe - Cr . Iron oxide Fe ₂ O ₃ serves as the primary catalyst, while chromium oxide Cr ₂ O ₃ acts as a stabilizer to prevent sintering and maintain activity. Evaluating the options: Fe - Cr is correct for this temperature range. Nickel