Shift process in production of single-alcohol

The shift process of the CO transformation reaction in single methanol production is shallow,and the vapor/gas molar ratio(R)is lower.As a result,the secondary reaction of middle temperature shift catalyst of Fe-Cr series such as over-reduction,F-T reaction and so on would occur easily under these conditions,then lead to phase change repeated,reduction of strength and service time shortened,so as to affect the production of methanol.However,this case will not occur when Co-Mo series low temperature shift catalyst of Fe-Cr series is adopted,it has found wide utilization,and there are three types of application process:the one stage,two stages and three stages of shift process,the process of each type has its feature respectively,the energy consumption is reduced drastically.