Bioelectrochemical treatment of gaseous byproducts

Inactive Publication Date: 2010-10-07
UT BATTELLE LLC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

[0016]In still another embodiment, the BES device is operated in such a manner that the cathode electrochemically reduces one or more electrochemically reducible species, such as a nitrate, chlorate, or reducible metal species, during microbial consumption of one or more mercaptan compounds or CO at the anode.
[0017]Thus, as will be described in further detail below, the method advantageously provides a

Problems solved by technology

The gaseous waste is often a significant financial liability since the waste is typically required to be processed by some measure before being released or disposed of.
The gaseous waste also presents an environmental liability since either raw or processed gaseous waste ultimately enters the environment.
These compounds are undesirable in petroleum products for a number of reasons, including their ready conversion to sulfur dioxide (SO2) gas when included in fossil fue

Method used

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  • Bioelectrochemical treatment of gaseous byproducts
  • Bioelectrochemical treatment of gaseous byproducts
  • Bioelectrochemical treatment of gaseous byproducts

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Embodiment Construction

[0020]In one aspect, the invention is directed to a method for removing oxidatively degradable gaseous compounds, such as mercaptan (i.e., thiol) compounds and / or CO, from a gas stream by treatment of the gas stream with one or more BESs. The BES considered herein is any reactor system in which electrons are transferred by microbes to a conductive surface (i.e., by an exoelectrogenic mechanism) during the course of microbial consumption of gaseous byproducts. The transferred electrons are directed to the production of energy, e.g., either electricity or hydrogen production. In a particular embodiment, the BES is a microbial fuel cell (MFC) or microbial electrolytic cell (MEC).

[0021]The method preferably involves flowing a mercaptan- or CO-laden gas stream through a porous anode of the BES, wherein the anode contains microbes residing thereon capable of utilizing the mercaptan compounds or CO as a nutritive and energy source. Catabolism of mercaptan compounds by the microbes results ...

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Abstract

The present invention relates to a method for producing electrical energy or hydrogen gas from a gas stream containing one or more gaseous compounds that are oxidatively degradable by microbes, the method comprising contacting the gas stream with an anode of a bioelectrochemical device, said anode containing said microbes which oxidatively degrade one or more of said gaseous compounds while producing electrical energy or hydrogen gas by said oxidative degradation, wherein: (i) said anode is sufficiently porous such that gas is permitted to flow therethrough, (ii) said anode contains on its surface and/or interior portions a proton-conducting medium, and (iii) said anode is in electrical communication with a cathode of the bioelectrochemical device. The invention is also directed to a bioelectrochemical device (e.g., microbial fuel cell) configured to accomplish the above method.

Description

[0001]This invention was made with government support under Contract Number DE-AC05-000R22725 between the United States Department of Energy and UT-Battelle, LLC. The U.S. government has certain rights in this invention.FIELD OF THE INVENTION[0002]The present invention relates to the field of bioelectrochemical treatment of gaseous products. More particularly, the present invention relates to bioelectrochemical (e.g., microbial fuel cell) treatment of sulfide-containing or carbon monoxide-containing gas streams, such as those occurring from a petroleum refining process or syngas-producing process.BACKGROUND OF THE INVENTION[0003]Gaseous streams emanating from industrial processes often contain numerous gaseous byproducts that are processed as waste or directly released into the environment. The gaseous waste is often a significant financial liability since the waste is typically required to be processed by some measure before being released or disposed of. The gaseous waste also pre...

Claims

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Application Information

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IPC IPC(8): C25B1/02
CPCY02E60/527H01M8/16Y02E60/50
Inventor BOROLE, ABHIJEET P.
Owner UT BATTELLE LLC
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