Combustion and Gas Compositions Using Hydrogen, Methane, etc. as Fuels in a Closed Vessel

Abstract

The authors investigated the combustion characteristics and gas compositions of combustion with a closed vessel using hydrogen, methane, etc. which are attractive in view of the serious air pollution situation, and possible alternative fuels. As a result, it is possible to decrease the rate of pressure rise and the reduction of NO_x concentration by lowering the oxygen concentration in hydrogen-air mixture without deteriorating combustion characteristics such as combustion efficiency, maximum combustion pressure etc. And by using a blended fuel of hydrogen and methane, it was found that the reduction of the rate of pressure rise and NO_x concentration were obtained, in comparison with the use of hydrogen only ; and at the same time, the combustion efficiency and HC concentration were improved remarkably in comparison with the use of methane only.