An apparatus is provided for regenerating an odor absorbent in a motor vehicle HVAC system. That apparatus includes a regeneration blower assembly that is connected between a heater plenum and a fresh air inlet duct of the HVAC system. Air is drawn from the passenger cabin of the motor vehicle through the heater plenum where that air is warmed. The warmed air is directed through the odor absorbent to remove odors and regenerate the odor absorbent. The warm air and the odors entrained therein is discharged through a fresh air inlet of the HVAC system.

An apparatus for recovering halogenated hydrocarbons has a desorption vessel which accommodates a sorbent which comprises the halogenated hydrocarbons, a steam generator which is configured to produce steam from water supplied to the steam generator and to introduce the steam which is produced into the desorption vessel in a manner such that the halogenated hydrocarbons are desorbed from the sorbent and absorbed by the steam, a cooling device which is configured to cool the steam supplemented with halogenated hydrocarbons in a manner such that a condensate is formed, and a collecting vessel which receives the condensate is provided.

Methods of sorption of various materials from an environment are disclosed herein. Embodiments of the materials include radioactive elements chlorates, perchlorates, organohalogens, and combinations thereof. Other embodiments pertain to methods of sorption of cationic radionuclides. Compositions produced by such methods are also disclosed herein. Embodiments of the methods may include contacting graphene oxides with the environment and sorption of the materials to the graphene oxides. In some embodiments, the sorption is relatively rapid in comparison to known sorbents; even in the presence of relatively higher concentrations of complexing agents. In some embodiments, the methods further include separating the graphene oxides that sorbed materials from the environment. Yet other embodiments may include desorbing the materials from the graphene oxides that sorbed the materials, and compositions therefrom.

Improved processes and systems for sweeping an activated carbon bed after steam regeneration to decrease or prevent the occurrence of flameouts or unit trips in a reaction furnace of a low-pressure sulfur recovery unit. The improved sweeping process includes conveying a sweeping gas to the reaction furnace at a sweeping flow rate that is less than an operational flow rate of the activated carbon bed. The improved system includes a bypass line that bypasses at least a portion of the main outlet line of the activated carbon bed to result in a reduced sweeping flow rate. The improved sweeping process may include starting the sweeping process after the temperature of the active carbon beds drops below a threshold level.

Method for treating water by filtration on a bed of granular material in order to reduce its content in contaminants, said method comprising the steps for: making said water travel in transit in a reactor containing said bed in a upward flow at a speed that does not permit the fluidization of said bed but permits said material to migrate, as and when the filtration takes place, towards the lower part of said reactor, continuously removing a fouled granular material at the foot of the reactor, by means of a piping into which a gas is insufflated, said fouled granular material being constituted by granular material and contaminants adsorbed on said granular material; continuously or intermittently carrying out the physical cleansing of said fouled granular material thus removed, so as to obtain a cleansed granular material essentially rid of said contaminants; reinjecting the granular material thus cleansed into an upper part of said bed; characterized in that the granular material is an adsorbent granular material and in that it comprises: a continuous or intermittent step for the discharging, during the filtration, of a part of the fouled granular material removed at the foot of the reactor; and a continuous or intermittent step for the introduction into the reactor, during the filtration, of fresh granular material in a quantity sufficient to compensate for the part of granular material discharged.

A promoted carbon and/or non-carbon base sorbent are described that are highly effective for the removal of mercury from flue gas streams. The promoted sorbent comprises a carbon and/or non-carbon base sorbent that has reacted with and contains forms of halogen and halides. Optional components may be added to increase and/or preserve reactivity and mercury capacity. These may be added directly with the base sorbent, or in-flight within a gas stream (air, flue gas, etc.), to enhance base sorbent performance and/or mercury capture. Mercury removal efficiencies obtained exceed conventional methods. The promoted sorbent can be regenerated and reused. Base sorbent treatment and preparation methods are also described. New methods for in-flight preparation, introduction, and control of the active base sorbent into the mercury contaminated gas stream are described.

Gaseous perfluorocarbons in a waste gas are adsorbed by an adsorption device. Subsequently a decomposition of the perfluorocarbons takes place with formation of hydrogen fluoride. The hydrogen fluoride is converted with an oxide of a metal to be reduced, to the metal fluoride thereof. The metal fluoride formed is then fed again to the reduction process.

In some embodiments, the present disclosure pertains to materials for use in CO.sub.2 capture in high pressure environments. In some embodiments, the materials include a porous carbon material containing a plurality of pores for use in a high pressure environment. Additional embodiments pertain to methods of utilizing the materials of the present disclosure to capture CO.sub.2 from various environments. In some embodiments, the materials of the present disclosure selectively capture CO.sub.2 over hydrocarbon species in the environment.

Disclosed is an improved process for recovering condensable components from a gas stream, in particular, heavier hydrocarbons from a gas stream. The present process uses solid adsorbent media to remove said heavier hydrocarbons wherein the adsorbent media is regenerated in a continuous fashion in a continuous adsorbent media co-current regeneration system using a stripping gas to provide a regenerated adsorbent media and a product gas comprising heavier hydrocarbons from a loaded adsorbent media.

Provided is a bead in which an adsorbent and an organic contaminant-degrading microorganism are supported, wherein an adsorbent for adsorbing organic contaminants is supported on the bead together with an organic contaminant-degrading microorganism for degrading the organic contaminants adsorbed to the adsorbent to allow for the adsorbent to remove organic contaminants in water and to allow for the organic contaminant-degrading microorganism to regenerate the adsorbent.