Johnson Matthey Inc.

American Cyanamid Company

Hyun J Jung

Henry C Foley

E Robert Becker

Hiei Ando

Francis P Daly

Barry John Cooper

James E Thoss

This invention relates to catalyst supports, methods for making them, and to catalysts prepared therefrom. More particularly, it relates to binary oxidic catalyst support materials comprising titania and zirconia with high porosity and high surface area prepared by either a pH swing technique or a constant pH technique followed by calcination at a temperature below 450.degree. C., with such materials being impregnated with catalytically active metal components.

Catalyst comprising a titania-zirconia support and supported catalyst

High porosity titania-zirconia catalyst support prepared by a process

In a process wherein diesel exhaust gas is passed through a filter to remove particulate therefrom before discharge and particulate deposited on the filter is combusted, the improvement which comprises combusting the particulate with a gas containing NO.sub.2, which may be catalytically generated in the exhaust system.

Treatment of diesel exhaust gases

An SCR catalyst consisting essentially of iron sulfate or oxysulfur iron compound carried by a mixture of ceria and alumina on a support.

Selective catalytic reduction catalyst consisting of iron sulfate, ceria

An SCR catalyst consisting essentially of at least one oxysulfur compound of manganese, nickel or mixtures thereof, carried by a supported mixture of ceria and alumina. The catalyst is characterized by its high activity and by its stability even when used in the absence of sulfur oxides.

Selective catalytic reduction catalyst consisting essentially of nickel

An SCR catalyst consisting essentially of at least one oxysulfur compound of manganese, nickel of mixtures thereof, carried by a supported mixture of ceria and alumina. The catalyst is characterized by its high activity and by its stability even when used in the absence of sulfur oxides.

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Wayne, PA, United States of America

Hyun J Jung