Catalyst is a substance (usually a precious metal such as platinum or palladium in our industry) that provides a surface for a chemical reaction with HAPS or VOCs to take place. This reaction will actually oxidize the VOCs in your airstream at a far lower temperature than can be accomplished thermally. Catalyst can be used in the form of coated ceramic beads, metal rings, monolith blocks, or all metal-mat configurations.
CPI designs and manufactures custom catalyst and catalyst retrofit systems for VOC, CO, and NOx from a variety of industrial and generating industries including air pollution control equipment such as a catalytic oxidizer.
More information on catalyst can be found here.