Patent ID: 7264648
Filing Date: 2007-09-04
Classification: B01D,Y10S

Abstract:
1. A method of removing siloxanes from a gas stream, comprising the steps of: (a) providing a plurality of different grades of a carbon filter media, wherein each different grade is characterized as having a different average pore size; (b) analyzing the gas stream to determine the contaminants present in the gas stream; (c) for each different contaminant, selecting the grade of carbon filter media whose pore size will enable the preferential removal of that contaminant; (d) using the different grades of carbon filter media selected to produce a multi-layer filter bed; and (e) passing the gas stream through the multi-layer filter bed to remove the contaminants, the different layers minimizing removal competition among the contaminants, thereby enhancing the removal of the siloxanes from the gas stream.