Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Patent
1999-01-11
2000-12-26
Bell, Mark L.
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
502327, 502328, 502330, 502332, 502335, 502336, 502337, 502338, 502341, 502346, 502415, 502524, 501 12, 501126, 501127, 501153, 423263, 423594, 423600, B01J 2300, C03C 300, C04N 3503, C01F 1700, C01G 4900
Patent
active
061659320
ABSTRACT:
The invention is a sol-gel processed metal-aluminum based oxide material useful as a catalyst including a NOx trapping catalyst. It is made from alkoxides comprising heterometallic alkoxides. The metal is transition metal, one or both of alkali metal and alkaline earth metal, and optionally also a lanthanide. Then invention is also a method of treating lean-burn internal combustion engine exhaust gas with this material, without any precious metal included with the material, in the exhaust gas system. The method comprises locating the NOx trap in the system where the NOx trap absorbs nitrogen oxides during lean cycle operation and desorbs the nitrogen oxides when the concentration of the oxygen in the exhaust gas is lowered as during a rich or stoichiometric cycle.
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Bell Mark L.
Ford Global Technologies Inc.
Hailey Patricia L.
Melotik Lorraine S.
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