1986 Volume 29 Issue 258 Pages 4291-4296
The catalytic reduction of NOx by NH3 generated from NOx has been applied to methanol engine exhaust system. In an automotive three-way catalyst (Pt-Rh coated) a large amount of NOx is converted to NH3 in a temperature range of 500-550K and an excess air ratio of 0.9-1.0. On the other hand, NOx reduction by NH3 in methanol engine exhaust gas is efficiently performed under the condition of O2= 2-4%, gas temperature= 450-500K, and NH3 ≥ the stoichiometry of NOx. Finally, about half an amount of NOx is converted to NH3 in a three-way catalyst and the formed NH3 ratio is around 55%. On the basis of these results, some systems using the application of NOx-NH3 reactions to practical engines are proposed and their potential is discussed.
JSME International Journal Series C Mechanical Systems, Machine Elements and Manufacturing
JSME International Journal Series B Fluids and Thermal Engineering
JSME International Journal Series A Solid Mechanics and Material Engineering
JSME international journal. Ser. C, Dynamics, control, robotics, design and manufacturing
JSME international journal. Ser. 3, Vibration, control engineering, engineering for industry
JSME international journal. Ser. A, Mechanics and material engineering
JSME international journal. Ser. 1, Solid mechanics, strength of materials