CO shift catalyst, CO shift reactor, and method for purifying gasified gas
View Patent ↗A CO shift catalyst according to the present invention is one that reforms carbon monoxide (CO) in gas. The CO shift catalyst includes: active ingredients including one of molybdenum (Mo) and iron (Fe) as a main ingredient and one of nickel (Ni) and ruthenium (Ru) as an accessory ingredient; and one or at least two oxides of titanium (Ti), zirconium (Zr), and cerium (Ce) as a carrier supporting the active ingredients. The CO shift catalyst can be used for a CO shift reactor 20 that converts CO in gasified gas 12 produced in a gasifier 11 into CO 2 .
1. A CO shift catalyst that reforms carbon monoxide (CO) in a gas, the CO shift catalyst comprising:
active ingredients including one of molybdenum (Mo) and iron (Fe) as a main ingredient and one of nickel (Ni) and ruthenium (Ru) as an accessory ingredient; and
a carrier supporting the active ingredients, wherein
the carrier is any one of the following:
oxide of titanium (Ti);
oxide of zirconium (Zr);
a complex oxide of titanium (Ti) and zirconium (Zr);
a complex oxide of titanium (Ti) and cerium (Ce); and
a complex oxide of zirconium (Zr) and cerium (ce); and
wherein an amount of the supported main ingredient of the active ingredients is 0.1 to 25% by weight, and an amount of the supported accessory ingredient is 0.01 to 1.5% by weight.
2. A CO shift reactor comprising a reactor filled with the CO shift catalyst according to claim 1 .
3. A method for purifying gasified gas, comprising:
reducing, through a filter, an amount of soot and dust in the gasified gas obtained in a gasifier;
cleaning, using a wet scrubber, the gasified gas;
reducing amounts of carbon dioxide and hydrogen sulfide in the gasified gas; and
causing CO in the gasified gas to undergo the CO shift reaction to convert the CO to CO 2 in the presence of a low concentration of hydrogen sulfide using the CO shift catalyst according to claim 1 , whereby purified gas is obtained.