Method of preparing a selenium nanomaterial and selenium nanomaterial articles. The method may include forming a saccharide coating on a surface of a solid support material, treating the solid support material having the saccharide coating on the surface with a selenous acid solution, and heating the solid support material to form the selenium nanomaterial on the surface of the solid porous support material. The saccharide may include a monosaccharide, a disaccharide, or a polysaccharide, or a combination thereof, such as sucrose, or fructose, or a combination thereof.

The present invention relates to sulfur based polymers and a process of making sulfur based polymers. The invention also relates to sorbents comprising the sulfur-based polymers. The invention also relates to the use of such polymers and sorbents in metal remediation or extraction. The invention also relates to methods of removing heavy metals from fluids.

A zeolite membrane composite includes a porous support and a zeolite membrane formed on the support. The zeolite membrane includes a low-density layer that covers the support, and a compact layer that covers the low-density layer. The compact layer has a higher content of a zeolite crystalline phase than the low-density layer. By in this way forming the compact layer on the low-density layer that covers the support, the thin compact layer with no defects can be formed more easily than in the case where a compact layer is formed directly on a support.

A system includes: an intake tube operably connected to a power plant, the intake tube configured to transport exhaust from the power plant; a drill configured to create a hole in the side of the plant usable to receive exhaust generated by the plant, the drill configured to remain in place and function as the intake tube, the system further comprising a cooling tube operably connected to the intake tube, the cooling tube configured to receive the exhaust from the intake tube; a U-shaped tube operably connected to the cooling tube, the U-shaped tube comprising a mister configured to generate a mist; and a vacuum tube fan operably connected to the U-shaped tube, the mister configured to cause the cooled exhaust and the heated liquid to bond so as to create a sludge, the sludge falling to a bottom of the system, the sludge being removed from the system.

The invention relates to an intelligent multi-pollutant ultra-low emission system and a global optimization method thereof. The intelligent multi-pollutant ultra-low emission system comprises a device layer, a sensing layer, a control layer and an optimization layer from bottom to top. The global optimization method comprises: obtaining an accurate description multiple pollutants in the generation, migration, transformation and removal process in multiple devices by means of accurate modeling of a multi-device multi-pollutant simultaneous removal process of the ultra-low emission system; accurately evaluating multi-pollutant emission reduction costs under different loads, coal qualities, pollutant concentrations and operating parameters through a global operating cost evaluation method of the ultra-low emission system; realizing minute-level planning and optimization of emission reductions of a global pollutant emission reduction device under different emission targets through a multi-pollutant, multi-target and multi-condition global operating optimization method; and guaranteeing reliable emission reduction and margin control of the pollutants through an advanced control method for reliable up-to-standard ultra-low emission of the pollutants.

Methods of sequestering carbon dioxide (CO.sub.2) are provided. Aspects of the methods include contacting a CO.sub.2 containing gaseous stream with an aqueous medium under conditions sufficient to produce a bicarbonate rich product. The resultant bicarbonate rich product (or a component thereof) is then combined with a cation source under conditions sufficient to produce a solid carbonate composition and product CO.sub.2 gas, followed by injection of the product CO.sub.2 gas into a subsurface geological location to sequester CO.sub.2. Also provided are systems configured for carrying out the methods.

Various embodiments disclosed relate to sorbents for the oxidation and removal of mercury. The present invention includes removing mercury from a mercury-containing gas using a halide-promoted and optionally ammonium-protected sorbent that can include carbon sorbent, non-carbon sorbent, or a combination thereof.

A sorbent composition that is useful for injection into a flue gas stream of a coal burning furnace to efficiently remove mercury from the flue gas stream. The sorbent composition may include a sorbent with an associated ancillary catalyst component that is a catalytic metal, a precursor to a catalytic metal, a catalytic metal compound or a precursor to a catalytic metal compound. Alternatively, a catalytic metal or metal compound, or their precursors, may be admixed with the coal feedstock prior to or during combustion in the furnace, or may be independently injected into a flue gas stream. A catalytic promoter may also be used to enhance the performance of the catalytic metal or metal compound.

The disclosure relates generally to reducing mercury emissions from a coal power plant. Specifically, a method for treating a gas stream containing mercury is provided that includes injecting a mercury oxidant or absorbent and a carrying agent into a gas stream that was produced by heating or burning a carbonaceous fuel comprising mercury. The carrying agent vaporizes after being injected into the gas stream. The mercury oxidant or absorbent and a carrying agent may be injected before passing the gas stream into a gas scrubber.

The present invention refers to a method for the preparation of a shell type catalyst for mercury oxidation, the catalyst and the use of the catalyst. The catalyst is prepared by a method comprising mixing titanium dioxide, a compound of a promoter selected from molybdenum and tungsten, and a binder, to prepare a paste; shaping the paste, to obtain a shaped paste; drying and optionally calcining the shaped paste, to obtain a support material; impregnating the support material with an aqueous alkaline impregnation solution comprising a vanadium compound; drying and calcining the impregnated support material, to obtain the catalyst. The catalyst is useful for purifying exhaust gases from coal plants and other power plants where mercury emissions occurs.