Preparation method of copper-based desulfurizer, copper-based desulfurizer and preparation system

Abstract

Belonging to the technical field of environmental protection and chemical industry, the invention discloses a preparation method of a copper-based desulfurizer, a copper-based desulfurizer and a preparation system. The preparation method includes: selecting Cu<2+> as the active component source, selecting Al<3+> as the carrier source, adopting alcohol amine as the precipitant, and using coprecipitation technique to prepare a compound hydroxide precipitate, then adding a molecular sieve and polyethylene glycol as the pore-forming agent, conducting full mechanical stirring, then carrying out aging, washing, drying, roasting and grinding, then adding a certain amount of binder, and performing kneading molding, thus obtaining the high-precision copper-based desulfurizer. The desulfurizer prepared with alcohol amine organic alkali as the precipitant has abundant pore structure, which makes the desulfurization precision reach 10ppb or below. Therefore, in the process of indirect coal liquefaction to produce various chemicals, the desulfurizer plays an important role in deep purification of syngas and prevention of downstream Fischer-Tropsch synthesis noble metal catalyst poisoning.

Description

technical field [0001] The invention belongs to the technical fields of environmental protection and chemical industry, and in particular relates to a preparation method of a copper-based desulfurizer, a copper-based desulfurizer and a preparation system. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] At present, coal accounts for more than 90% of the available reserves of China's energy and mineral resources, and oil and gas account for less than 10%. The consumption structure is neither safe nor sustainable. [0004] Therefore, the development of coal liquefaction products and clean fuel utilization technology is an inevitable choice to solve the shortage of petroleum energy in my country. Coal liquefaction is a process in which coal is used as raw material and oil is obtained under the action of a catalyst, mainly including direct liquefaction and indirect liquefaction; the direct liquefaction o...

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Problems solved by technology

[0003] At present, coal accounts for more than 90% of the available reserves of China's energy and mineral resources, and oil and gas account for less than 10%. The consumption structure is neither safe nor sustainable

[0015] (1) In the prior art, inorganic alkalis are generally used for precipitation. Due to the solubility of inorganic alkalis, there are fewer types of alkalis available for precipitating agents. Inorganic alkalis such as sodium carbonate and sodium hydroxide are relatively alkaline. During the reaction process, the controllability and adjustability of the pH range are limited, and the reaction is more violent

[0016] (2) In the prior art, the desulfurizer is obtained by precipitating the active component and mixing it with the auxiliary agent after drying. The defect of this method is that the auxiliary agent and the active group are mechanically mixed, and some raw materials are still in the granular state during the mixing process. Therefore, the raw materials are not mixed uniformly during the mixing process, and the dispersion of the active components is not high, which ultimately affects the desulfurization effect

[0017] (3) In the prior art, the catalyst is also prepared by the impregnation method. The defect of this method is that the active components cannot fully reach the inner surface of the carrier during the impregnation process, and the active components with a higher concentration will gather on the outer surface, affecting the activity. The components diffuse to the inner surface, and the solution where the active components are located cannot be completely absorbed by the carrier, which will cause a lot of waste of materials

[0018] (4) In the prior art, salts need to be roasted and decomposed at a temperature as high as 600°C and above, resulting in a large amount of energy consumption; and roasting produces some acidic gases, which will form acid rain in the environment and bring greater pollution to the environment

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