Tsuneyuki Tanizawa

TL;DR: In this article, a 3-way catalysts for a lean-burn engine have been developed, and their NOx purification mechanisms have been studied, which consist of precious metals, aluminum oxide and some other metal compounds such as NOx, storage compounds.

TL;DR: In this article, a method for purifying an exhaust gas by simultaneously removing carbon monoxide, hydrocarbons, and nitrogen oxides contained in the exhaust gas, comprising bringing the oxygen rich exhaust gas into contact with an exhaustgas purifying catalyst comprised of at least one noble metal selected from the group consisting of platinum and palladium.

TL;DR: In this article, the authors proposed a purifying method which efficiently purifies in the wide temp. range NO x, CO and HC contained in an exhaust gas in the actual running state of an automobile varying theoretical A/F value to overlean A /F value.

TL;DR: In this paper, a method for purifying an oxygen rich exhaust gas by simultaneously removing the carbon monoxide, hydrocarbons, and nitrogen oxides contained in the exhaust gas was proposed.

TL;DR: In this paper, the authors proposed a method to further efficiently purify NOx in oxygen excessive exhaust gas and to enhance the capacity for purifying NOx after a durability test, where at least two metals selected from among alkaline earth metals and at least one of Pt and Pd are supported on a porous carrier.