A method for treating a biogas containing siloxanes, includes: firstly, filtering the siloxane-containing biogas with a filter made from activated carbon fabric, such as to adsorb the siloxanes in the filter; and, secondly, regenerating the filter by passing an electric current through the filter while it is subjected to a flushing gas flow. A device carries out the method.

Adsorbent materials are disclosed, along with filter elements containing the adsorbent materials methods of using adsorbents to remove siloxane contaminants from a gas stream. The method includes providing an adsorbent material that has been washed with an acid and passing a gas through the adsorbent material so as to reduce siloxane levels in the gas. A filter element for reducing siloxane levels in a gas includes a first adsorbent material, the first adsorbent material comprising an acid-washed adsorbent; and a second adsorbent material, the second adsorbent material comprising an acid-impregnated adsorbent.

A filtration device including a fluid-impermeable housing having a gas inlet and outlet, and containing within the housing first filter media particles of an extended surface area substrate and containing at least one metal impregnant, and second filter media particles of an extended surface area zirconium hydroxide substrate. The device may be used in atmospheres containing various harmful gases, and may provide particularly useful improvements in NO.sub.x breakthrough times compared to a device containing only the first filter media particles or only the second filter media particles.

Adsorbent materials are disclosed, along with filter elements containing the adsorbent materials methods of using adsorbents to remove slioxane contaminants from a gas stream. The method includes providing an adsorbent material that has been washed with an acid and passing a gas through the adsorbent material so as to reduce siloxane levels in the gas. A filter element for reducing siloxane levels in a gas includes a first adsorbent material, the first adsorbent material comprising an acid-washed adsorbent; and a second adsorbent material, the second adsorbent material comprising an acid-impregnated adsorbent.

The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for: (i) reducing the levels of one or more gas phase selenium compounds and/or one or more other RCRA metals, or RCRA metal compounds (regardless of whether such other RCRA metals or RCRA metal compounds are in the gas phase or some other phase); (ii) capturing, sequestering and/or controlling one or more gas phase selenium compound and/or one or more other RCRA metals, or RCRA metal compounds (regardless of whether such other RCRA metals or RCRA metal compounds are in the gas phase or some other phase) in a flue gas stream and/or in one or more pieces of emission control technology; and/or (iii) capturing, sequestering and/or controlling one or more gas phase selenium compound and/or one or more other RCRA metals, or RCRA metal compounds (regardless of whether such other RCRA metals or RCRA metal compounds are in the gas phase or some other phase) in a flue gas stream prior to desulfurization and/or in one or more pieces of emission control technology prior to one or more desulfurization units,

The present invention relates generally to the field of emission control equipment for boilers, heaters, kilns, or other flue gas-, or combustion gas-, generating devices (e.g., those located at power plants, processing plants, etc.) and, in particular to a new and useful method and apparatus for reducing or preventing the poisoning and/or contamination of an SCR catalyst. In another embodiment, the method and apparatus of the present invention is designed to protect the SCR catalyst. In still another embodiment, the present invention relates to a method and apparatus for increasing the service life and/or catalytic activity of an SCR catalyst while simultaneously controlling various emissions.

The invention relates to a method of capturing a sintered product after sintering a waste gas in a semiconductor manufacturing process and its capturing device. The method comprises providing aerosolised water molecules to be entered into a reaction chamber of a waste gas treatment tank; and capturing a product generated after a sintering reaction of the waste gas by diffusion distributing of the aerosolised water molecules, wherein, the aerosolised water molecules are diffusion distributed between a bottom edge of a waste gas reaction end in the reaction chamber and a tank wall surrounding the reaction chamber. The present invention further provides a device for capturing a sintered product for implementing the method. The object of the present invention is to solve problems saying that a semiconductor exhaust gas is processed by a high temperature sintering treatment, the generated SiO.sub.2 powders, the WO.sub.2 powders or the BO.sub.2 powders are extremely fine, the F.sub.2 gas is small molecules, and it is not easy to capture them during a rear stage water washing program.

Autonomous localized permeability material systems are provided that can include: a dynamically permeable porous material; and immobilized reagents operatively associated with the porous material in sufficient proximity to trigger a localized change in material pore size upon reagent reaction. Methods for preparing these materials are also provided as well as methods for autonomously modifying localized permeability of material.

This disclosure provides a halogenated activated carbon composition comprising carbon, a halogenated compound and a salt. In some embodiments, the halogenated compound and the salt comprise a naturally occurring salt mixture, as may be obtained from ocean water, salt lake water, rock salt, salt brine wells, for example. In some embodiments, the naturally occurring salt mixture comprises Dead Sea salt.

This disclosure provides a halogenated activated carbon composition comprising carbon, a halogenated compound and a salt. In some embodiments, the halogenated compound and the salt comprise a naturally occurring salt mixture, as may be obtained from ocean water, salt lake water, rock salt, salt brine wells, for example. In some embodiments, the naturally occurring salt mixture comprises Dead Sea salt.