A system is provided for carbon dioxide (CO.sub.2) emission recovery. The system includes a methanization reactor. The methanization reactor is configured to receive CO.sub.2 separated from one or more off gases of a brake manufacturing process, receive hydrogen (H.sub.2) produced from an electrolysis process, convert the CO.sub.2 and the H.sub.2 via methanization reaction to produce methane (CH.sub.4), and supply the produced CH.sub.4 to at least one of a carbon/carbon (C/C) preform production process or another system for heat generation.

Disclosed is a catalyst suitable for the catalytic oxidative cracking of a H.sub.2S-containing gas stream. The catalyst comprises at least one or more active metals selected from the group consisting of iron, cobalt, and nickel, supported by a carrier comprising ceria and alumina. The active metal is preferably in the form of its sulphide. Also disclosed is a method for the production of hydrogen from a H.sub.2S-containing gas stream, comprising subjecting the gas stream to catalytic oxidative cracking so as to form H.sub.2 and S.sub.2, using a catalyst in accordance with any one of the composition claims.

Disclosed is a catalyst suitable for the catalytic oxidative cracking of a H.sub.2S-containing gas stream. The catalyst comprises at least one or more active metals selected from the group consisting of iron, cobalt, and nickel, supported by a carrier comprising ceria and alumina. The active metal is preferably in the form of its sulphide. Also disclosed is a method for the production of hydrogen from a H.sub.2S-containing gas stream, comprising subjecting the gas stream to catalytic oxidative cracking so as to form H.sub.2 and S.sub.2, using a catalyst in accordance with any one of the composition claims.

Embodiments include a method for reducing corrosion in a pump exhaust foreline of a processing system. The method begins with the operation of a plasma processing system and evacuating a fluorine or chlorine containing gas into a processing chamber exhaust foreline as effluent. The effluent is abated in a plasma abatement system with a hydrogen containing reagent in a vacuum environment. The abated effluent contains one or more of HF or HCl at vacuum pressure. A controller runs a program to determine if a condition for condensation of HCl or HF exist based on a characteristic, flow rate and pressure of the effluent. A non-condensable gas is injected into the effluent. The abated effluent is pumped to a pump exhaust foreline coupled to an outlet of the pump, wherein the pump exhaust foreline is at atmospheric pressure.