A plasma abatement process for abating effluent containing compounds from a processing chamber is described. A plasma abatement process takes gaseous foreline effluent from a processing chamber, such as a deposition chamber, and reacts the effluent within a plasma chamber placed in the foreline path. The plasma dissociates the compounds within the effluent, converting the effluent into more benign compounds. Abating reagents may assist in the abating of the compounds. The abatement process may be a volatizing or a condensing abatement process. Representative volatilizing abating reagents include, for example, CH.sub.4, H.sub.2O, H.sub.2, NF.sub.3, SF.sub.6, F.sub.2, HCl, HF, Cl.sub.2, and HBr. Representative condensing abating reagents include, for example, H.sub.2, H.sub.2O, O.sub.2, N.sub.2, O.sub.3, CO, CO.sub.2, NH.sub.3, N.sub.2O, CH.sub.4, and combinations thereof.

The present invention relates in general to a process for removing mercury from a mercury-containing flue gas using dregs from a Kraft pulp mill green liquor clarifier. The dregs are washed with water to produce a particulate carbon slurry which is activated with hydrobromic acid and injected into a mercury-containing flue gas to oxidize and adsorb the mercury at temperatures less than about 900 F. A slurry of sodium hydroxide and calcium carbonate, optionally also obtained from Kraft mill waste, is injected into the hot flue gas to absorb and remove CO.sub.2, SO.sub.2, and SO.sub.3.

Proposed is an apparatus for separating CO2 gas captured with ammonia gas as an absorbent and the ammonia gas from a capture solution. The apparatus includes cation and anion exchange membranes spaced apart from each other to form a capture channel therebetween for a capture solution flow, cathode and anode current collector plates and their corresponding cation and anode exchange membranes forming cathode and anode channels therebetween, respectively. In the separate channels, basic and acidic solutions flow. Power applied to the collector plates drives ammonium and bicarbonate ions from the capture solution through the membranes, and then the ions convert into ammonia and CO2 gases in a chemical reaction, respectively. Through the power application with the basic and acidic solution flows through the corresponding channels, and a flow-conductive acid/base electrolytic separation method, gas separation without directly adding an acidic or basic solution to a capture solution is possible.

The present disclosure relates to methods for producing metal sulfide disposed on particle substrates. In at least one embodiment, a method for producing an alkali earth hydroxide particle having a metal sulfide disposed thereon includes introducing an alkali earth oxide particle with a metal sulfate to form a first composition. The method includes introducing an alkali sulfide or an alkali earth sulfide with the first composition to form a second composition. The present disclosure further relates to compositions of matter having metal sulfide disposed on a particle substrate. In at least one embodiment, a composition of matter includes an alkali earth hydroxide particle. The composition of matter includes a metal sulfide disposed on the alkali earth hydroxide particle.

The present disclosure relates to a method that includes, in a first zone, contacting an ammonia-rich gas comprising ammonia with an ammonia-lean liquid sorbent resulting in the reversible transfer of at least a portion of the ammonia from the ammonia-rich gas to the ammonia-lean liquid sorbent, thereby forming an ammonia-rich liquid sorbent and an ammonia-lean gas and, in a second zone, removing at least a portion of the ammonia from the ammonia-rich liquid sorbent to form gaseous ammonia and regenerate the ammonia-lean liquid sorbent.