Demercuration catalyst taking metal organic framework as carrier and preparation method thereof

Abstract

The invention discloses a preparation method of a demercuration catalyst taking a metal organic framework as a carrier and belongs to the technical field of catalysts. According to the invention, trimesic acid is dissolved in an organic solvent to obtain a mixed solution A, transition metal salt is dissolved in deionized water to obtain a transition metal salt solution B, an active component and an assisting carrier salt are dissolved in the deionized water to obtain an active component aqueous solution C; adding the mixed solution A to the transition metal salt solution B for uniformly mixingwhile stirring at the temperature of 30-60 DEG C, introducing nitrogen, and then reacting for 1-3h under ultrasonic conditions; adding the active component aqueous solution C to the reaction solution, heating to 120-150 DEG C and performing thermostatic reaction for 12-36h, and cooling; and filtering, washing, drying, grinding, tabletting and sieving the reaction product to obtain the demercuration catalyst taking a metal organic framework as a carrier. The catalyst provided by the invention has relatively high adsorbing efficiency and adsorbing time.

Description

technical field [0001] The invention discloses a mercury removal catalyst with a metal organic framework as a carrier and a preparation method thereof, belonging to the technical field of catalysts. Background technique [0002] Mercury is highly volatile, highly toxic, highly corrosive and bioaccumulative, and widely exists in natural gas, coal combustion flue gas, and industrial waste gas. Mercury emissions from coal combustion are the main source of man-made atmospheric mercury pollution, accounting for about 30% of mercury emissions. If it is not handled properly in industrial production, it will cause immeasurable damage to the ecological environment. There are three forms of mercury in coal-fired flue gas: elemental mercury (Hg 0 ), oxidized mercury (Hg 2+ ) and particulate mercury (Hg p ). Hg 2+ Soluble in water, easier to remove. Hg p Can be removed by dust removal equipment. Hg 0 With extremely high volatility and extremely low water solubility, it is diff...

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Problems solved by technology

[0004] Chinese patent application CN106311279 discloses an iron-based mercury removal agent and its preparation method. The catalyst product has high strength and has mercury removal accuracy, but the desorption principle is to oxidize mercury to form HgS, and does not use the oxygen in the gas to remove HgS. 0 Oxidized to HgO, the mercury capacity is not high

Chinese patent application CN106268788A discloses a catalyst for the catalytic oxidation of elemental mercury in flue gas and its preparation method. This method simulates the high concentration of mercury in flue gas and high purification efficiency, but the catalyst production cycle is long, which is not conducive to industrial application

Chinese patent application CN105289278A discloses a method for oxidizing elemental mercury by improving the flue gas SCR denitration treatment system. This method can simultaneously remove nitrate and mercury, but the reaction temperature is high, the operating environment is unsafe, and the mercury removal efficiency is low.

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