The invention is a nitrogen oxide trap comprising a porous support; and catalysts comprising platinum and lithium loaded on the porous support, the lithium being present in a high loading of at least 10 weight percent based on the weight of the porous support. The trap may be used in an internal combustion engine exhaust gas catalyst system. During lean-burn operation of the engine the trap sorbs nitrogen oxides (NOx) and releases the nitrogen oxides during decreased oxygen concentration in the exhaust gas, the desorbed NOx being converted to N2 and O2.
申请公布号
WO9747374(A1)
申请公布日期
1997.12.18
申请号
WO1997GB01548
申请日期
1997.06.06
申请人
FORD GLOBAL TECHNOLOGIES INC.;FORD MOTOR COMPANY LIMITED