Huaneng Clean Energy Research Institute

Shanghai Shidongkou No. 2 Power Plant Huaneng International Power Co., Ltd.

Jinhang Fan

Dongfang Guo

Shiwang Gao

Lianbo Liu

Shiqing Wang

Ye Li

Hanming Liu

Huanjun Wang

Xiaolin Lu

Run Song

Yuanxue Zhang

A method for deep desiliconization of coal ash and recovery of silicon resources includes: ball-milling and drying decarburized coal ash; adding calcium oxide into a salt to obtain a mixture, and heating the mixture to a molten state under an inert atmosphere to obtain a molten salt, a molar ratio of the calcium oxide to the salt ranging from 0.5% to 18%; placing the ball-milled and dried coal ash into the molten salt, performing reaction under an atmospheric pressure, separating a reaction product from the molten salt, cooling the separated reaction product under an inert atmosphere, washing the cooled reaction product and drying the washed reaction product to obtain desiliconized coal ash; and cooling the molten salt under an inert atmosphere, washing the cooled salt and filtering the washed salt to recover calcium silicate and a filtrate.

Method for deep desiliconization of coal ash and recovery of silicon resources

A method for recovering metal resources in coal ash by molten salt electrolysis includes: calcinating the coal ash for decarburization to obtain the decarburized coal ash; subjecting the decarburized coal ash to ball milling to obtain coal ash powders; pressing the coal ash powders to form a plate; placing the plate as a cathode into an electrolyte in a reactor, and performing electrolytic reaction under an oxygen-free condition at an electrolytic reaction temperature of 550° C. to 900° C. in the reactor to obtain a reaction product; and removing the reaction product from the reactor, cooling the reaction product to room temperature in an inert atmosphere, and cleaning the cooled reaction product to obtain a silicon-aluminum based alloy.

System and method for recovering metal resources in coal ash by molten salt electrolysis

A hydrophobic MOF-based porous liquid carbon capture absorbent is provided and includes a sterically hindered solvent and a hydrophobic MOFs modified material dispersed in the sterically hindered solvent. A mass percent of the hydrophobic MOFs modified material in the hydrophobic MOF-based porous liquid carbon capture absorbent is 5% to 20%. The hydrophobic MOFs modified material is prepared by a method comprising following steps: dispersing an MOFs material, a surface modifier and a catalyst in an organic solvent, and mixing them evenly, followed by a standing reaction to obtain the hydrophobic MOFs modified material.

Hydrophobic MOF-based porous liquid carbon capture absorbent and preparation method therefor

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Beijing, China

Jinhang Fan