Lots of developed MCFC power generation systems are combined with LNG reforming system for supplying hydrogen. To enhance the energy efficiency of MCFC power generation system, hot residue gases that include unreacted hydrogen were used to heat up MCFC stack by using catalytic combustion. Surface area of perovskite oxides decreased with increasing metal content. La0.9Ce0.1FeO3 catalyst showed the highest surface area. The patterns observed for all sample corresponded to mainly perovskite-type structure. The temperatures required for conversion of hydrogen in combustion were presented. This is an abstract of a paper presented at the 2007 AIChE Annual Meeting (Salt Lake City, UT 11/4-9/2007).