A system for offshore electricity generation and direct carbon dioxide sequestration includes an offshore marine platform on which is mounted a plurality of internal combustion engines. The marine platform is deployed above an offshore, subsea storage reservoir. The internal combustion engines drive electric generators to produce electricity. Flue gas from the internal combustion engines is directed to a carbon dioxide capture system adjacent the internal combustion engines and in fluid communication with the flue gas exhausts of the internal combustion engines. The carbon dioxide capture system captures gaseous carbon dioxide from the flue gas, and then injects the captured carbon dioxide directly into the offshore, subsea storage reservoir. Compressors in fluid communication with the carbon dioxide capture system may be utilized to increase the pressure of the captured gaseous carbon dioxide to a desired injection pressure. Electricity produced by the electric generators is conveyed to a land-based power grid.

A method for operating a flue gas purification system, comprising, in the flue gas purification system, equipped with a boiler which can burn oil fuel and coal fuel either simultaneously or switching therebetween, a denitration equipment having a reducing agent injector and a catalytic reactor, an inlet flue to guide flue gas discharged from the boiler to the denitration equipment, an outlet flue to guide flue gas discharged from the denitration equipment, a bypass flue which can guide flue gas from the inlet flue to the outlet flue so as to bypass the denitration equipment, and a bypass damper, opening the bypass damper and burning oil fuel in the boiler being in condition not yet suitable for coal combustion to allow the flue gas discharged from the boiler to dividedly flow to the denitration equipment and the bypass flue, switching the oil fuel to coal fuel when the boiler is in condition suitable for coal combustion to burn the coal fuel in the boiler, closing the bypass damper after switching the oil fuel to the coal fuel, and then injecting a reducing agent when the catalytic reactor is in condition suitable for a denitration reaction.

Sorbent compositions containing calcium and iodine are added to coal to mitigate the release of mercury and/or other harmful elements into the environment during combustion of coal containing natural levels of mercury.

Sorbent compositions containing calcium and iodine are added to coal to mitigate the release of mercury and/or other harmful elements into the environment during combustion of coal containing natural levels of mercury.

Process and device for pneumatically conveying a powdery material comprising the steps of Pneumatically conveying a powdery material in a pneumatic conveying pipeline (first) and into said recipient by a flow generated by a blower, A powdery material dosing step, A fluctuation step of pressure drop in said pneumatic conveying pipeline or up to said recipient,
wherein a sonic device generates sonic waves inside said pneumatic conveying pipeline or up to said recipient and provides a counteraction on the fluctuation step of the pressure drop in said pneumatic conveying pipeline or up to said recipient.

A desulfurization apparatus includes a blowdown water line, an organic matter remover, an absorber, and a makeup water introducing line. The blowdown water line is for introducing boiler cooling tower blowdown water from a boiler cooling tower. The organic matter remover is disposed on the blowdown water line to remove organic matter in the boiler cooling tower blowdown water by activated carbon. The absorber is configured to absorb sulfur oxides in flue gas from a boiler. The makeup water introducing line is for introducing the boiler cooling tower blowdown water from which the organic matter has been removed as makeup water for the absorber.

A desulfurization apparatus includes a blowdown water line, an organic matter remover, an absorber, and a makeup water introducing line. The blowdown water line is for introducing boiler cooling tower blowdown water from a boiler cooling tower. The organic matter remover is disposed on the blowdown water line to remove organic matter in the boiler cooling tower blowdown water by activated carbon. The absorber is configured to absorb sulfur oxides in flue gas from a boiler. The makeup water introducing line is for introducing the boiler cooling tower blowdown water from which the organic matter has been removed as makeup water for the absorber.

Operation of a thermochemical regenerator to generate soot or to increase the amount of soot generated improves the performance of a furnace with which the thermochemical regenerator is operated.

Operation of a thermochemical regenerator to generate soot or to increase the amount of soot generated improves the performance of a furnace with which the thermochemical regenerator is operated.

Provided are: a wet desulfurization apparatus 13 which removes sulfur oxides in flue gas 12A from a boiler 11; a mist collection/agglomeration apparatus 14 which is provided on a downstream side of the desulfurization apparatus 13 and forms agglomerated SO.sub.3 mist by causing particles of SO.sub.3 mist contained in flue gas 12B from the wet desulfurization apparatus 13 to be bonded together and have bloated particle sizes; a CO.sub.2 recovery apparatus 18 constituted by a CO.sub.2 absorption tower 16 having a CO.sub.2 absorption unit 16A which removes CO.sub.2 contained in flue gas 12D by being brought into contact with a CO.sub.2 absorbent and an absorbent regeneration tower 17 which recovers CO.sub.2 by releasing CO.sub.2 from the CO.sub.2 absorbent having absorbed CO.sub.2 and regenerates the CO.sub.2 absorbent; and a mist collection unit 16C which collects CO.sub.2 absorbent bloated mist bloated by the CO.sub.2 absorbent being absorbed by the agglomerated SO.sub.3 mist in the CO.sub.2 absorption unit 16A.