Preparation method capable of improving low-temperature activity of low-pressure cobalt-molybdenum sulfur-tolerant shift catalyst

The invention relates to a preparation method capable of improving the low-temperature activity of a low-pressure cobalt-molybdenum sulfur-tolerant shift catalyst. The sulfur-tolerant shift catalyst which contains nano-molybdenum oxide and nano-cobalt oxide is produced directly by utilizing a conventional process capable of producing a spherical activated alumina carrier by adopting a quick release method. An impregnation process is omitted; the preparation is simple; the cost is low; catalytic active components are uniform; a porous structure is reasonable; the specific surface area is increased remarkably; the low-temperature activity is high; through the detection at 160 DEG C according to a national chemical industry standard HG/T2779-2009, the CO conversion rate is greater than or equal to 90 percent, the activation temperature is 40 DEG C lower than that of an SB303Q-type cobalt-molybdenum sulfur-tolerant shift catalyst; the low-pressure cobalt-molybdenum sulfur-tolerant shift catalyst is particularly s