Systems and methods for treating automotive vehicle emissions on board an automotive vehicle include the use of waste heat recovery, electrochemical water splitting, phototcatalytic water splitting, and selective catalytic reduction. Waste heat recovery is used to power electrochemical water splitting, or photocatalytic water splitting. Photons collected from a solar panel are used in photocatalytic water splitting, or in photo-assisted selective catalytic reduction. Hydrogen gas generated by water splitting is used in conjunction with catalytic reduction units to catalytically reduce NOx in an engine exhaust gas.

A process is presented where a feed stream containing a hydrogen sulfide and another feed component is introduced into an absorber that the feed stream flows upward from the bottom of the absorber and contacts a liquid treatment solution, where the liquid treatment solution contains a sulfur dye catalyst. The hydrogen sulfide is absorbed into the liquid treatment solution and converted into sulfide ions. The other feed component is removed from the absorber vessel substantially free of the hydrogen sulfide and a spent treatment solution is also removed from the absorber vessel and fed to an oxidation vessel where it is contacted with an oxygen containing gas causing the sulfide ions to oxidize to thiosulfate and converting the spent sulfur dye catalyst to regenerated sulfur dye catalyst. The thiosulfate is recovered, and the regenerated sulfur dye catalyst can be recycled as part of the liquid treatment solution.

An embodiment of the present invention relates to an aqueous solvent solution for absorbing carbon dioxide, and a process using an aqueous solvent solution for absorbing carbon dioxide. The aqueous solvent solution having a catalytic compound dissolved in the water that is an alkali salt of an N-substituted amino acid and at least one base that is dissolved in water. The catalytic compound assisting in forming a bicarbonate.

An exhaust gas treatment system for an internal combustion engine includes an exhaust gas pathway that receives exhaust gas from the engine, a temperature sensor configured to generate a temperature signal associated with a temperature of the exhaust gas at a position along the exhaust gas pathway, and a reductant source. The system also includes first and second injectors in fluid communication with the reductant source. The first and second injectors are configured to inject reductant into the exhaust gas pathway at first and second rates. The system also includes a first treatment element positioned downstream of the first injector and within the exhaust gas pathway, and a controller in communication with the temperature sensor. The controller is configured to receive the temperature signal from the temperature sensor and adjust at least one of the first rate or the second rate based at least in part on the temperature signal.

Disclosed herein is a photocatalytic oxidation device that includes a frame and a pair of opposing photocatalytic cell panels. An ultraviolet lamp is disposed within an interior chamber and, when activated, causes the generation of oxidizers at the cell panels. Air is passable through apertures of the cell panels and thus may be moved through the device. The device is structurally configured and dimensionally optimized to provide effective photocatalytic activity without overly restricting airflow.

Disclosed is a combustion chamber (10) of the carbon dioxide supplier including: a combustion chamber (10) combusting a mixture of air and fuel; an air supply unit supplying an into the combustion chamber (10); and a fuel supply unit supply in a fuel to the combustion chamber (10). Representative Figure is FIG. 6.

A catalyst for oxidation reaction of metallic mercury and reduction reaction of nitrogen oxide, comprising an oxide of titanium, an oxide of molybdenum, an oxide of vanadium, an oxide of phosphorus and gypsum is obtained by kneading titanium dioxide, ammonium molybdate, ammonium metavanadate, phosphoric acid, gypsum dihydrate and water using a kneader to obtain a paste, applying the paste to a metal lath substrate, and then drying and calcining the resultant.

A catalyst for treating an exhaust gas comprising SO.sub.2, NO.sub.x and elemental mercury in the presence of a nitrogenous reductant comprises a composition containing oxides of: (i) Molybdenum (Mo) and optionally Tungsten (W); and (ii) Vanadium (V); and (iii) Titanium (Ti); and (iv) Phosphorus (P), wherein, with respect to the total metal atoms in the composition, the composition comprises: (i) Mo in an amount of less than 2 at. %, and optionally up to 9 at. % W; (ii) from 2.5 to 12 at. % V; (iii) from 85 to 96 at. % Ti, and wherein the composition comprises (iv) P in an atomic ratio to the sum of atoms of Mo, W and V of from 1:2 to 3:2. The values expressed must total 100%.

A process is presented to treat a process stream containing a hydrocarbon (oil and/or gas) and hydrogen sulfide with a liquid treatment solution containing a sulfur dye catalyst. The process stream can be within a pipeline, wellbore, subsea pipeline or a wellhead that contains hydrogen sulfide where the liquid treatment solution is injected at a predetermined point to define a scavenger zone such that the sulfur dye catalyst in the liquid treatment solution causes the sulfide from the hydrogen sulfide to react with the catalyst. The hydrocarbon component is separated substantially free of the hydrogen sulfide from a spent treatment solution containing spent sulfur dye catalyst which can then be fed to an oxidation vessel where it is contacted with an oxygen containing gas causing the sulfide to oxidize to thiosulfate and converting the spent sulfur dye catalyst to regenerated sulfur dye catalyst. The thiosulfate can be recovered, and the regenerated sulfur dye catalyst can be recycled as part of the liquid treatment solution.

A method for preparing a porous organic framework-supported atomic noble metal catalyst for catalytic oxidation of VOCs at room temperature, including: (1) adding 2,6-diaminopyridine and 1,3,5-benzenetricarboxylic acid chloride to a triethylamine-containing dichloromethane solution and stirring the reaction mixture; reacting the reaction mixture in an oil bath under heating to produce a porous pyridine-amide framework; (2) impregnating the porous pyridine-amide framework completely in a noble metal salt solution followed by ultrasonication and standing; reducing the porous organic framework-supported noble metal ions with sodium borohydride solution; washing and drying to produce a semi-finished porous pyridine-amide framework-supported atomic noble metal catalyst; (3) calcining the semi-finished catalyst in a muffle furnace to obtain a finished catalyst. The catalyst provided herein has high atomic dispersion and atomic active sites, significantly improving the catalytic efficiency.