The aim of this paper was to understand the functions of a computational fluid dynamics (CFD) program and model catalytic combustion in a microchannel. There are several affecting parameters that influence the flame stability in microcombustion systems. Heat transfer and loss issues become dominant as the dimensions of the microcombustor decrease. Flames are quenched in small dimensions largely due to two primary mechanisms; thermal and radical quenching. Catalytic combustion technology provides the means to solve the parameters that affect the flame stability in microcombustion systems. Limited experiments and simulations have been conducted for the research of catalytic combustion in microcombustors. This is due to the lack of fundamental knowledge of its controlling processes at present. CHEMKIN 4.0 chemical kinetic simulations software was used to simulate a two dimensional cylindrical channel laminar flow system in this paper. It is the interest of the author to understand the functions of the CFD program. Knowledge and information gathered from the use of the program would provide encouragement and motivate future candidates to develop the thesis topic further. Simulation results were shown describing several examples of error messages which future candidates might encounter. Descriptions of steps involved in attempts to remedy the problem by the author were described, along with the outcome of each error. A flow chart showing the iterative process of developing a chemical reaction mechanism is shown. This aids future candidates to see the necessary steps involved in the preparation for conduction of simulations. Recommendations were also made by the author, which include steps to tackle similar error messages that might be encountered by future candidates attempting similar simulation.