摘要:
One exemplary embodiment is a refinery or a petrochemical production facility. The refinery or petrochemical production facility can include: a) a catalyst regeneration zone; b) a halogen removal zone; and c) an elimination zone for at least one of a dioxin and a furan compound, wherein at least a portion of an effluent from the halogen removal zone is combined with a stream comprising oxygen from the catalyst regeneration zone or halogen removal zone.
摘要:
A thermal reactor for use during the abatement of a semiconductor manufacturing process is provided, including a thermal reaction unit having: an interior porous wall that defines a central chamber, the interior porous wall formed from a plurality of stacked porous sections; at least one gas inlet in fluid communication with the central chamber and adapted to introduce gaseous waste stream to the central chamber; a thermal mechanism positioned within the central chamber and adapted to decompose the gaseous waste stream within the central chamber, thereby forming reaction products; and a fluid delivery system adapted to provide a fluid to the central chamber through the interior porous wall at a sufficient force to reduce deposition of reaction products on an inner surface of the interior porous wall of the central chamber; wherein at least one of the porous sections has one or more of: a property that varies within the porous section; and a property that differs from a property of at least one other porous section of the interior porous wall.
摘要:
According to a process for treating perfluorides in which a perfluoride treatment undertaker carries out decomposition treatment of perfluorides discharged from a manufacturing plant by using a perfluoride treating apparatus connected to said manufacturing plant, and the cost of treatment of perfluorides calculated according to the amount of perfluorides treated by said perfluoride treating apparatus is communicated to the owner of said manufacturing plant, it is possible to reduce the cost required for the decomposition treatment of perfluorides which cost is to be defrayed by the product manufacturer.
摘要:
Disclosed are a vanadia-titania aerogel catalyst having high specific surface area and porosity, a method of preparing the same and a method of completely oxidatively-decomposing a chlorinated aromatic compound using the catalyst under air condition. The vanadia-titania aerogel catalyst of the invention is an aerogel form having many porosities and a high specific surface area obtained by performing a supercritical drying of vanadia-titania wet gel, which is prepared by a sol-gel method, with carbon dioxide and then firing the dried vanadia-titania, with a micro porosity structure being maintained, consists of vanadia and titania wherein a content of the vanadia is 1˜15 wt % of an overall catalyst weight. In addition, according to the invention, the vanadia-titania aerogel catalyst may further comprise a manganese oxide of 1-5 wt % or a sulfur component of 0.0001-1 wt %. Since the vanadia-titania aerogle catalyst of the invention has the very high conversion rate and selectivity for the complete oxidation reaction of the chlorinated aromatic compound and is very thermally stable, it can be usefully used in the oxidation reaction having a high heating value capable of generating local heat spots.
摘要:
In certain aspects, a system is provided for abating perfluorocarbons (PFCs) from a gaseous waste stream that includes (1) a wet scrubber adapted to scrub a gaseous waste stream and having an outlet adapted to discharge a scrubbed gaseous waste stream; and (2) a controlled decomposition oxidation (CDO) system. The CDO system includes a CDO thermal reaction chamber that includes (a) an inlet coupled to the outlet of the wet scrubber; (b) a catalyst bed adapted to abate PFCs within the CDO thermal reaction chamber; and (c) an outlet. Numerous other aspects are provided.
摘要:
According to a process for treating perfluorides in which a perfluoride treatment undertaker carries out decomposition treatment of perfluorides discharged from a manufacturing plant by using a perfluoride treating apparatus connected to said manufacturing plant, and the cost of treatment of perfluorides calculated according to the amount of perflorides treated by said perfluoride treating apparatus is communicated to the owner of said manufacturing plant, it is possible to reduce the cost required for the decomposition treatment of perfluorides which cost is to be defrayed by the product manufacturer.
摘要:
The present invention relates to a catalyst for removing aromatic halogenated compounds comprising dioxin, carbon monoxide and nitrogen oxide simultaneously and a method for preparing the catalyst, more particularly, a catalyst comprising 0.1 to 5% by weight of vanadium, 1 to 12% by weight of metals in 6A family and 0.1 to 10% by weight of Ag in titania carrier or, alternatively, a catalyst produced by impregnating said catalyst in 0.05 to 1M sulfuric acid solution to carry out acid treatment. The catalyst according to the present invention has improved efficiency for removing 1,2-dichlorobenzene as a reactant model of dioxin and carbon monoxide rather than existing catalysts and also, alternative efficiency for removing nitrogen oxide substantially equal to commonly known catalysts, so that the catalyst can effectively control various air pollutants contained in exhaust gas.
摘要:
A gas stream containing at least one fluorine compound selected from the group consisting of compounds of carbon and fluorine, compounds of carbon, hydrogen and fluorine, compounds of sulfur and fluorine, compounds of nitrogen and fluorine and compounds of carbon, hydrogen, oxygen and fluorine is contacted with a catalyst comprising at least one of alumina, titania, zirconia and silica, preferably a catalyst comprising alumina and at least one of nickel oxide, zinc oxide and titania in the presence of steam, thereby hydrolyzing the fluorine compound at a relatively low temperature, e.g. 200.degree.-800° C., to convert the fluorine of the fluorine compound to hydrogen fluoride.
摘要:
The waste-gas treating system is designed for treating the waste gas created in general semiconductor processing in production; the waste-gas treating system mainly is provided at one side of a waste-gas treating equipment, and contains therein mainly a condensing tube, a catalyst treating unit, a water treating unit and water collecting tanks; the catalyst treating unit decomposes toxic gases such as per-fluorine compound (PFC) etc. that are remained in the waste-gas treating equipment and are unable to be dealt with to thereby form non-toxic gases, and does water treating on the byproduct from dissociation, thus a function of lowering temperature can be acquired, then the gases are exhausted to the atmosphere to perform secondarily treating to reduce the content of PFC in the atmosphere and to reduce damage of the hothouse effect.