Abstract:
A method of producing a biomass-based fuel pellet, such as a fuel pellet which includes thermoplastic polymeric material and a substantial amount of cellulosic material, e.g. cellulosic material derived from biomass source(s), is provided. The method commonly includes compressing a feed mixture to form a densified material, where the feed mixture includes about 5 to 15 wt. % of the thermoplastic polymeric material and at least about 75 wt. % cellulosic material. Many embodiments of the fuel pellets are suitable for use in a coal-fired furnace and/or in other industrial boiler applications.
Abstract:
Sorbent compositions containing halogen and calcium are added to coal to mitigate the release of sulfur and/or other harmful elements, including mercury, into the environment during combustion of coal containing natural levels of mercury.
Abstract:
The present invention provides a method and system for drying mineral slurry concentrate and high moisture content minerals using activated alumina. The method and system dries the mineral slurry concentrate by combining the slurry with the activated alumina. While in combination, the mixture is agitated to maximize surface contact between the activated alumina and the slurry. As the mineral slurry concentrate contacts the activated alumina, the surfactant moisture on the mineral elements is then absorbed by the activated alumina. The activated alumina allow for the water molecules to be adsorbed by the activate alumina, thus being removed from the slurry elements. After a period of agitation, the method and system thereby separates the activated alumina from the mineral slurry concentrate.
Abstract:
Sorbent compositions containing halogen and calcium are added to coal to mitigate the release of sulfur and/or other harmful elements, including mercury, into the environment during combustion of coal containing natural levels of mercury.
Abstract:
To suppress the generation of clinker so as to prevent the generation of a burning trouble, ceramic particles 30 are covered over a porous plate 4 to form a fire bed 3. Woody pellets 31 are scattered on the fire bed and combustion air is ejected from the lower side of the porous plate so as to burn the pellets. At the time of discharging ash generated by the burning to a secondary combustion space on the downstream side together with an air current of the combustion air or combustion gas, the ceramic particle layers and the woody pellet layer are stirred by a stirring section 21, 22 to thereby break clinker of the combustion ash formed in the fire bed, whereby the growth of the clinker is suppressed and the generation of a burning trouble is prevented.
Abstract:
The present invention is directed to an additive, primarily for low sulfur and high alkali coals, that includes a transition metal and optionally a halogen to effect mercury oxidation.
Abstract:
Methods and systems for producing activated carbon from a particulate coal feedstock that include the introduction of an activation medium such that the water content of the coal feedstock is equal to or greater than that of the feedstock's naturally occurring state. Different methods and system configurations allow the production of activated carbon or other heat-treated carbons while concurrently avoiding adverse reaction conditions.
Abstract:
A biofuel that includes a blend of municipal solid waste, selected recyclables, and/or construction and demolition waste including about 40% to 60% wood, about 10% to 20% paper, about 10% to 20% cardboard, about 5% to 10% non-chlorinated plastics, about 5% to 10% rags, about 5% to 10% rugs, and an emission reducing agent, the emission reducing agent being one or more of urea, calcium hydroxide, hydroquinone, anthraquinone, ammonium hydroxide, ammonia, and an ammonium compound.
Abstract:
Processes and compositions are provided for decreasing emissions of mercury upon combustion of fuels such as coal. Various sorbent compositions are provided that contain components that reduce the level of mercury and/or sulfur emitted into the atmosphere upon burning of coal. In various embodiments, the sorbent compositions are added directly to the fuel before combustion; are added partially to the fuel before combustion and partially into the flue gas post combustion zone; or are added completely into the flue gas post combustion zone. In preferred embodiments, the sorbent compositions comprise a source of halogen and preferably a source of calcium. Among the halogens, iodine and bromine are preferred. In various embodiments, inorganic bromides make up a part of the sorbent compositions.
Abstract:
A power plant may include a furnace, a coal supply, and a sorbent supply. The furnace may have at least one face with a distribution of a plurality of injectors. The coal supply may be in communication with the furnace. The injectors may be in communication with the source of sorbent and provide injection thereof into the furnace. The sorbent may include an alkaline powder having at least one calcium compound, silica, and alumina.