Sorbent filter for the removal of vapor phase contaminants

Gas separation: processes – Electric or electrostatic field – And nonelectrical separation of fluid mixture

Reexamination Certificate

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Details

C095S107000, C095S109000, C095S110000, C095S134000, C096S055000, C096S123000, C096S135000, C096S150000

Reexamination Certificate

active

08029600

ABSTRACT:
Methods and apparatuses are described for removing a contaminant, such as a vaporous trace metal contaminant like mercury, from a gas stream. In one embodiment, a primary particulate collection device that removes particulate matter is used. In this embodiment, a sorbent filter is placed within the housing of the primary particulate collection device, such as an electrostatic precipitator or a baghouse, to adsorb the contaminant of interest. In another embodiment, a sorbent filter is placed within a scrubber, such as a wet scrubber, to adsorb the contaminant of interest. In some embodiments, the invention provides methods and apparatuses that can advantageously be retrofit into existing particulate collection equipment. In some embodiments, the invention provides methods and apparatuses that in addition to removal of a contaminant additionally remove particulate matter from a gas stream.

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U.S. Appl. No. 12/411,255, filed Mar. 25, 2009, Chang.

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