Three way catalyst comprising extruded solid body

A three-way catalysed soot filter comprising an extruded solid body in the wall-flow filter configuration, the extruded solid catalyst body consisting essentially of:

• 15-70% by weight of cordierite, nitrides, carbides, borides, intermetallics, lithium aluminosilicate, a spinel, an optionally doped alumina, titania, zirconia, titania-zirconia, zircon and mixtures of any two or more thereof;
• 0-20% by weight of a source of silica;
• 5-50% by weight of an aluminosilicate zeolite having a silica-to-alumina ratio of 10 to 150, optionally containing one or more metal;
• 20-80% by weight optionally stabilised ceria;
• and
• 0-20% by weight of inorganic fibres,
• the extruded solid catalyst body being coated with one or more layer(s) comprising supported Pd and Rh.

A three-way catalyst comprising:

• an extruded solid body comprising
• 10-95% by weight of at least one binder/matrix component;
• 5-90% by weight of an aluminosilicate zeolite having a silica-to-alumina ratio of 10 to 150;
• and
• 0-80% by weight optionally stabilised ceria, and
• one or more coating layers on a surface of the extruded solid body, the
• one or more coating layers comprising Pd and Rh.