Siloxane removal process

Details Siloxane removal process Siloxane removal process

2007-12-11

2007-12-11

Lawrence, Frank M. (Department: 1724)

Gas separation: processes

Solid sorption

Including reduction of pressure

C095S104000, C095S106000, C095S116000, C095S148000

Reexamination Certificate

active

11092684

ABSTRACT:
Biogas released from landfills and sewage treatment plants is freed of siloxane contaminants by passing the biogas through a bed containing activated alumina, which absorbs the siloxanes. When the activated alumina becomes saturated with siloxanes, the absorption capability of the activated alumina can be recovered by passing a regeneration gas through the bed of activated alumina. A system containing two or more beds of activated alumina can use one bed to remove siloxanes from biogas while one or more of the other beds are being regenerated.

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Schweigkofler, Martin, et al., “Removal of siloxanes in biogases”, J. Haz. Mat., B83 (2001), pp. 183-196.
Letter dated Jun. 18, 2007 from Michael J. Mitariten of Guild Associates addressed to Frank Lawrence of the United States Patent and Trademark Office with reference to the within application.
Article entitled Removal of Siloxanes in Biogases, authored by Martin Schweigkofler and Reinhard Niessner, published in the Journal of Hazardous Materials (2001), pp. 183-186.

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