초록 ▼

In the oxide gas absorbing arrangement disclosed in the specification, metal foils having a thickness .ltoreq.0.05 mm are coated with an oxide gas absorbing layer containing gamma aluminum oxide. One metal foil is corrugated and joined to a smooth foil and the combined foils are rolled into a cylind

In the oxide gas absorbing arrangement disclosed in the specification, metal foils having a thickness .ltoreq.0.05 mm are coated with an oxide gas absorbing layer containing gamma aluminum oxide. One metal foil is corrugated and joined to a smooth foil and the combined foils are rolled into a cylinder to provide parallel gas passages in which exhaust gases are exposed to the oxide gas absorbing layer. To enhance absorption turbulence is created in the gas passages by twisting the cylinder to narrow and contort the individual passages.

대표청구항 ▼

[ I claim:] [1.]1. A method for removing at least one nitrogen oxide (NO.sub.x) from the exhaust gas of an internal combustion engine, comprising the steps of:(a) operating an internal combustion engine to produce an exhaust gas flow containing oxygen;(b) passing exhaust gas containing oxygen over a

[ I claim:] [1.]1. A method for removing at least one nitrogen oxide (NO.sub.x) from the exhaust gas of an internal combustion engine, comprising the steps of:(a) operating an internal combustion engine to produce an exhaust gas flow containing oxygen;(b) passing exhaust gas containing oxygen over an oxide gas absorbing layer on a support member having a wall thickness .ltoreq.160 microns;(c) storing the NO.sub.x in the absorbing layer;(d) heating the absorbing layer to a predetermined temperature of at least 500.degree. C. during the operation of the engine;(e) forming an exhaust gas from the internal combustion engine which is poor in oxygen and/or an exhaust gas having a stoichiometric excess of a reducing agent;(g) desorbing the NO.sub.x from the absorbing layer and reducing the NO.sub.x in the exhaust gas which is poor in oxygen or has a stoichiometric excess of reducing agent while the absorbing layer is at a temperature equal to or above the predetermined temperature;(h) forming an exhaust gas flow containing oxygen;(i) terminating heating of the absorbing layer to the predetermined temperature; and(j) repeating steps (c) through (h).