Provided are system and method thereof for desulfurization and dedusting of flue gas from a coke oven. The system for desulfurization and dedusting of flue gas from a coke oven includes a heat exchanger, a desulfurization reaction unit, a dedusting unit, and a blower; the heat exchanger includes a raw flue gas duct and a clean flue gas duct; the raw flue gas duct, the desulfurization reaction unit, and the dedusting unit are coupled in sequence, a clean flue gas outlet of the dedusting unit communicates with an inlet of the clean flue gas duct, and an outlet of the clean flue gas duct is coupled to the blower. The raw flue gas is heated in the heat exchanger by using temperature difference between clean flue gas and the raw flue gas, and then the raw flue gas is delivered into the desulfurization reaction unit for a desulfurization reaction.

A central controller for completely cleaning indoor air pollution is disclosed. The central controller is disposed in an indoor space to detect air pollution and output air pollution data. Intelligence operations are implemented in accordance with the air pollution data by the central controller to determine a location of the air pollution, and a controlling instruction is intelligently and selectively issued through a wireless communication transmission to enable a plurality of physical filtration devices or a plurality of chemical filtration devices. Each physical filtration device or each chemical filtration device includes a fan and a filter element. The fan is driven upon receiving the controlling instruction to generate an airflow convection in a direction. The air pollution is removed through the filter element, so that the air pollution in the indoor space is completely cleaned to form a clean and safe breathing air state.

A powdery calcium-magnesium compound used as a sorbent composition in flue gas treatment, compatible with electrostatic precipitators. The calcium magnesium compound is doped with calcium nitrate or nitric acid to reduce the electrical resistivity of the particles, increasing their collection efficiency.

Calcium hydroxide-containing compositions can be manufactured by slaking quicklime, and subsequently drying and milling the slaked product. The resulting calcium hydroxide-containing composition can have a size, steepness, pore volume, and/or other features that render the compositions suitable for treatment of exhaust gases and/or removal of contaminants. In some embodiments, the calcium hydroxide-containing compositions can include a D.sub.10 from about 0.5 microns to about 4 microns, a D.sub.90 less than about 30 microns, and a ratio of D.sub.90 to D.sub.10 from about 8 to about 20, wherein individual particles include a surface area greater than or equal to about 25 m.sup.2/g.

A process to treat/clean a gas, containing SO.sub.2, CO.sub.2 and O.sub.2 comprising the steps of: bringing the gas in contact with an activated carbon catalyst, converting SO.sub.2 to SO.sub.3/H.sub.2SO.sub.4 on the activated carbon catalyst, washing the SO.sub.3/H.sub.2SO.sub.4 from the activated carbon catalyst to obtain a sulfuric acid solution and a SO.sub.2 depleted gas; bringing the SO.sub.2 depleted gas in contact with an aqueous ammonia solution wherein CO.sub.2 is converted to obtain a SO.sub.2 and CO.sub.2 depleted gas containing ammonia; and bringing the SO.sub.2 and CO.sub.2 depleted gas containing ammonia in contact with the sulfuric acid solution obtained in step a. to form a solution containing ammonium sulfate and a treated, clean gas.

Provided are system and method thereof for desulfurization and dedusting of flue gas from a coke oven. The system for desulfurization and dedusting of flue gas from a coke oven includes a heat exchanger, a desulfurization reaction unit, a dedusting unit, and a blower; the heat exchanger includes a raw flue gas duct and a clean flue gas duct; the raw flue gas duct, the desulfurization reaction unit, and the dedusting unit are coupled in sequence, a clean flue gas outlet of the dedusting unit communicates with an inlet of the clean flue gas duct, and an outlet of the clean flue gas duct is coupled to the blower. The raw flue gas is heated in the heat exchanger by using temperature difference between clean flue gas and the raw flue gas, and then the raw flue gas is delivered into the desulfurization reaction unit for a desulfurization reaction.

The invention relates to the technical field of the treatment of exhaust gases containing sulfur oxides, especially exhaust gases from technical combustion plants, the so-called flue gases, or exhaust gases from technical processes, such as steel production (e.g. blast furnace gases, etc.) Especially, the invention relates to a method for the treatment of exhaust gases containing sulfur oxides, in particular from technical combustion plants, such as flue gases, or from technical processes, for the purpose of removing and/or separating off the sulfur oxides or for the purpose of reducing the sulfur oxide content, as well as a system for carrying out the method.

Disclosed herein are particulate sorbents, such as sorbents that can be used for mercury removal applications. The absorbent can comprise at least one ammonium phosphate and at least one activated carbon selected from unhalogenated activated carbon and halogenated activated carbon, wherein the halogenated activated carbon contains at least one halogen impregnant on its surface. Also disclosed are methods of making sorbents, and methods of mercury removal, e.g., from flue gas generated by coal combustion.

Systems and methods for sequestering emissions from marine vessels are provided. Emissions (either flue gas from exhaust or CO.sub.2 carried on the ship under pressure in gas cylinders or CO.sub.2 obtained during the ships travel via capture is mixed in a reactor with sea water (e.g., via gas exchange through head-space equilibration or bubbling through a diffuser) until a pH of 5.5 to 6.5 is obtained. Systems and reactors pump seawater through a reactor vessel containing a reaction medium (e.g., carbonates and silicates). The reactor produces an effluent that can be expelled into the ocean. The effluent produced from the result of a reaction according to embodiments has approximately twice the concentration of Dissolved Inorganic Carbon (DIC) and Alkalinity (Alk) as the incoming sea water and has an increased Ca.sup.+2 concentration above sea water.

A method of providing a plant nutrient composition, the method comprising: (a) contacting a cellulosic material with a composition comprising an amino compound; (b) contacting the cellulosic material with a composition comprising carbon dioxide, sulfur dioxide and mixtures thereof; (c) optionally, contacting the cellulosic material with a composition comprising a source of one or more elements selected from nitrogen, phosphorous, potassium, calcium, magnesium, sulphur, boron, cobalt, chlorine, copper, iron, manganese, molybdenum, zinc and sodium; and (d) optionally, contacting the resultant material with a plant and/or a base growing medium.