Patent ID: 6818195
Filing Date: 2004-11-16
Classification: B01D

Abstract:
A combustion catalyst for removing organic compound(s), which comprises a first catalyst comprising alumina containing at least one of the elements of the platinum group, and a second catalyst comprising a mixture of zeolite with a metal oxide, wherein the metal oxide is loaded with at least one of the elements of the platinum group;the alumina of the first catalyst has a pore size distribution such that where â€œaâ€  represents a pore radius in Ã¥ at the maximum of the pore radius distribution curve, the accumulated pore volume of pores having radii in the range of(aâˆ’25) Ã¥ to (a+25) Ã¥ is at least 65% of the total volume of all the pores, said alumina containing less than 1% by weight of rare earth elements: and wherein said first catalyst and said second catalyst are not mixed together and are arranged in a manner such that organic compound(s) to be removed is/are contacted first with the first catalyst and then with the second catalyst.