There is provided a method of efficiently manufacturing purified 1224yd containing 1224yd at a high concentration from a mixture containing 1224yd and a compound that forms an azeotropic composition or an azeotropic-like composition with 1224yd. A manufacturing method of purified 1224yd, includes making a first mixture of 1224yd and a compound (X1) forming an azeotropic composition or an azeotropic-like composition with 1224yd to be brought into contact with a first extraction solvent to obtain purified 1224yd not substantially containing the compound (X1).

Systems methods for collecting an anaesthetic agent are described herein. The systems include at least one anaesthetic gas scavenging system (AGSS) for receiving exhaust gas from at least one source, the exhaust gas including the anaesthetic agent to be collected. Each AGSS comprises at least one power source for providing suction of the exhaust gas from the plurality of sources. The systems also include a collection system for recovering the anaesthetic agent from the exhaust gas. The collection system includes a compressor for compressing the exhaust gas from the AGSS to increase a pressure of the exhaust gas and at least one adsorbent tank configured to receive the compressed exhaust gas from the compressor and adsorb the anaesthetic agent from the compressed exhaust gas.

A method to produce an acid-depleted biogas is described. The method includes supplying biogas to a biogas acid removal system to produce an acid-depleted biogas. Biogas pre-processing, post-processing, and a product production system may be integrated with the biogas acid removal process to produce a product. A two-stage volatile organic compound removal process is also described including a volatile organic compound removal step, and a halogenated volatile organic compound removal step, followed by an acid removal step. Oxygen removal from the biogas is also provided by combusting oxygen together with halogenated volatile organic compounds within the biogas, followed by removing acid generated in the combustion of the halogenated volatile organic compounds.

Methods for purification of a fluorocarbon or hydrofluorocarbon containing at least one undesired halocarbon impurities comprise flowing the fluorocarbon or hydrofluorocarbon through at least one adsorbent beds to selectively adsorb the at least one undesired halocarbon impurities through physical adsorption and/or chemical adsorption, wherein the at least one adsorbent beds contain a metal oxide supported on an adsorbent in an inert atmosphere.

Dry pumps are used to pump a variety of gas mixtures from the semiconductor industry. The present invention provides a liquid ring pump located between the dry pump and an abatement device to remove soluble corrosive materials prior to the exhaust gases entry to the abatement device, the work fluid exhausted from the liquid ring pump being separated from the gas prior to entry to the abatement device.

In one embodiment, a process for the purification of CO.sub.2 from chlorinated and non-chlorinated hydrocarbons, comprising: contacting a CO.sub.2 stream with a metal oxide catalyst, wherein the stream comprises the CO.sub.2 and impurities comprising the non-chlorinated hydrocarbons and the chlorinated hydrocarbons; interacting the impurities with the catalyst to form additional CO.sub.2 and metal chloride; and regenerating the catalyst by contacting the metal chloride with an oxygen containing gas stream. In another embodiment, a process for the purification of CO.sub.2 from chlorinated hydrocarbons and non-chlorinated hydrocarbons, comprising: contacting a CO.sub.2 stream with a metal oxide catalyst, wherein the CO.sub.2 stream comprises the CO.sub.2 and impurities comprising the non-chlorinated hydrocarbons and the chlorinated hydrocarbons; oxidizing the impurities with catalyst oxygen to form additional CO.sub.2 and converting the chlorine to metal chloride; and regenerating the catalyst by contacting the metal chloride with an oxygen containing gas stream.

Process for treating a gas contaminated by at least one element selected from the group consisting of heavy metals, organic compounds, and combinations thereof, wherein a calcium-phosphate reactant (reagent) particle comprising apatite is brought into contact with the contaminated gas at a temperature of at least 30 C. and preferably at most 1100 C. The metal(s) and/or organic compound(s) to be removed from the contaminated gas may be selected among the list of: Al, Ag, As, Ba, Be, Bi, Ce, Co, Cd, Cu, Cr, Fe, Hf, Hg, La, Li, Mg, Mn, Mo, Ni, Pb, Pd, Rb, Sb, Se, Sn, Sr, Th, Ti, U, V, Y, Zn, Zr, VOC, aromatic compounds, PAHs, dioxins, furans, or any mixture thereof. In such process, an alkaline compound particle comprising sodium bicarbonate, sodium carbonate, sodium sesquicarbonate (trona), quick lime, hydrated lime, lime stone or combinations thereof, may be further brought into contact with the contaminated gas.

A method of removing impurities from a gas including the steps of removing impurities from biogas comprising at least one adsorbents via a process vessel or reactor, directing the purified gas to an device to generate power and/or heat, regenerating the saturated adsorption media with the waste heat recovered from the engine exhaust and directing the regeneration gas (hot air or engine exhaust) to flare, engine exhaust stack, or atmosphere.

A method for capturing halocarbon from a gas, the method comprising processing gas containing halocarbon with material which is undamaged by exposure to supercritical fluid. A method for reclaiming halocarbon from a material, the method comprising exposing the material to a supercritical fluid.A module for processing a gas containing halocarbon, the module comprising material for capturing halocarbon from a gas, wherein the module is arranged to withstand supercritical fluid.

A plant and a related method for the regeneration of fluorinated compounds, particularly sulfur hexafluoride, includes an inlet section designed to receive a gas mixture with the fluorinated compound to be regenerated, an outlet section designed to convey out the regenerated gas, and a fluid dynamic circuit that connects the inlet section to the outlet section and includes filtering elements. The filtering elements have a separation unit where the gas mixture is brought to a temperature and pressure that cause the fluorinated compound to condense while keeping the other components of the mixture in the gaseous state. The condensed fluorinated compound represents the regenerated compound to be conveyed toward the outlet section.