A process to purify biogases (i.e., landfill gas and municipal digester gas), to enable such biogases to be utilized to generate electricity and heat. Biogases from these sources generally include small amounts of organosilicons (which are particularly harmful to power generation equipment, and especially harmful to micro-turbines, reciprocating internal combustion engines, and large turbines), and halogenated chemical species (which can foul expensive emission catalysts). A fluidized media bed reactor is configured to concentrate offending organics, and is coupled with another reactor vessel configured to strip the offending organics off saturated media with a hot inert gas. The removed organics are further concentrated into an inert gas stream that is conveyed to a small flare for greater than 99% destruction. The energy required to strip the organics from the spent media, and to energize the flare, is generated by the combustion of a small quantity of the purified biogas.

Title
Regenerable purification system for removal of siloxanes and volatile organic carbons
Application Number
11/233479
Publication Number
20060144224
Application Date
September 21, 2005
Publication Date
July 6, 2006
Inventor
Jeffrey V Wetzel
Lake Stevens
WA, US
Paul M Tower
Snohomish
WA, US
Lowell E Howard
Redmond
WA, US
Agent
Law Offices Of Ronald M Anderson
WA, US
Assignee
Applied Filter Technology
WA, US
IPC
B01D 53/30
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