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.

A MEG reclamation process includes the step of increasing above 2,000 ppm the divalent metal salts concentration of a rich (wet) MEG feed stream flowing into a precipitator. The increasing step includes routing a salts-saturated MEG slipstream from the flash separator it to the precipitator. The slipstream may be mixed with a fresh water feed stream, a portion of the rich MEG feed stream, or some combination of the two. The rich MEG feed stream also may be split into two streams, with a portion of the stream being heated and routed to the flash separator and the other portion being combined as above with the removed slipstream. The process can be performed on the slipstream after dilution and prior to entering the precipitator or after being loaded into the precipitator. Removal of the insoluble salts may be done in either a batch or continuous mode.

A flue-gas purification system includes a flue-gas cycling system, a reactor, and an absorbent adding system having at least a catalytic absorbent, wherein the catalytic absorbent is being gasified for reacting with the flue-gas in the reactor in a homogenous gas-gas phase reacting manner. Therefore, the purification system has fast reaction rate between the pollutants of the flue-gas and the catalytic absorbent, which is preferably ammonia, to efficiently remove pollutants, so as to effectively purify the flue-gas.

The present invention relates to a pre-hydrotreatment and purification method for waste lubricating oil, the method comprising the following steps: mechanical impurities are removed from waste lubricating oil, and then the oil is subjected to flash distillation to separate free water and a portion of light hydrocarbons; a bottom product of the flash distillation column is mixed with hydrogen and a self-sulfurizing oil-soluble transition metal catalyst, and then enters a slurry bed reactor for pre-hydrotreatment; a gas product obtained by performing separation on a reaction effluent is subjected to adsorption purification and then enters a hydrogen recycle compressor for cyclic use; a liquid product obtained by performing separation on a reaction effluent is subjected to hydrocyclone separation and solvent washing to remove solid residue, and finally a purified lubricating oil component is obtained. The method of the present invention has such advantages as simple processing procedures, a high non-ideal component conversion rate, a high oil liquid yield, and good quality. In addition, the oil-soluble catalyst features simple dispersion, no need for vulcanization, a small catalyst adding amount, high low-temperature hydrogenation activity, and is capable of effectively preventing the coking that could occur during a process of preheating the waste lubricating oil, markedly extending the operational lifespan of a waste lubricating oil hydrogen treatment device.

Implementations of the present disclosure relate to systems for abating F-gases present in the effluent of semiconductor manufacturing processes. In one implementation, a system is provided that includes a water and oxygen delivery system. The water and oxygen delivery system includes a water vapor reagent source fluidly coupled with a chamber foreline via a first conduit; and an oxygen reagent source fluidly coupled with the chamber foreline via a second conduit fluidly coupled with the first conduit. The system further includes a plasma source fluidly coupled with the water and oxygen delivery system via the chamber foreline.

Processes and facilities for producing recycled chemical products from waste plastic are described herein. The processes include treating process streams, such as a pyrolysis gas stream and/or at least a portion of a cracker furnace effluent stream, in a caustic scrubber process to remove certain components, such as carbon dioxide. The spent caustic solution from the caustic scrubber process is then recycled and reused in other caustic processes within the facility, which can include a halogen neutralization process from removing halogens from a liquification process off-gas.

This invention serves to repurpose existing ethylene oxide sterilization chambers utilizing a novel chemical means of sterilization. Ethylene oxide is a longstanding gaseous sterilant for medical devices but has increasing problems associated with its hazards. Ethylene oxide is a carcinogenic and explosive chemical, and its emissions can be very harmful and cause serious health risks. Due to this, the FDA and many medical device manufacturers are trying to reduce or eliminate the use of the gas. Chlorine dioxide gas is a nearly identical alternative mode of sterilization that is non-carcinogenic and non-explosive. If firms choose to eliminate the use of ethylene oxide but do not want to waste the capital expenditure on existing sterilizers, they can instead utilize the ethylene oxide-to-chlorine dioxide conversion system of the present invention and use an effective and environmentally friendly form of sterilization in a system they already possess.

Provided is a polymer electrolyte membrane for SF.sub.6 separation, using a nitrate electrolyte, where the nitrate is solvated in the membrane to thus form ionic aggregates, whereby polar SF.sub.6 has difficulty passing through the membrane due to the barrier effect of the ionic aggregates, thus enabling the separation of SF.sub.6.

Provided is a polymer electrolyte membrane for SF.sub.6 separation, using a nitrate electrolyte, where the nitrate is solvated in the membrane to thus form ionic aggregates, whereby polar SF.sub.6 has difficulty passing through the membrane due to the barrier effect of the ionic aggregates, thus enabling the separation of SF.sub.6.

Disclosed is an apparatus and method for recovery of target gas, which may increase a target gas concentration in a recovered gas by using a single gas separation membrane module and a plurality of gas storage tanks. The apparatus for recovery of target gas includes a gas separation membrane module configured to perform an enrichment process n times (n is a natural number) so that an injected gas is separated into a permeated gas and a recovered gas in each enrichment process, and (n+1) number of gas storage tanks, wherein in an n.sup.th enrichment process, gas stored in an n.sup.th gas storage tank is supplied to the gas separation membrane module and separated into an n.sup.th permeated gas and an n.sup.th recovered gas, the n.sup.th permeated gas is stored in a (n1).sup.th gas storage tank, and the n.sup.th recovered gas is stored in a (n+1).sup.th gas storage tank.