Preparation method for activated carbon for desulfurization and denitrification and activated carbon for desulfurization and denitrification and application

Abstract

The invention provides a preparation method for activated carbon for desulfurization and denitrification. The method comprises the steps of (1) mixing anthracite and bituminous coal in the mass ratio of 1:(0.2-0.4) to obtain mixed feed coal; (2) preparing a vanadium salt solution; (3) mixing the mixed feed coal, a binder and the vanadium salt solution in the mass ratio of (0.6-0.8):(0.2-0.3):(0.1-0.15) and stirring evenly to obtain coal paste; and (4) sequentially molding, carbonizing and activating the coal paste to obtain the activated carbon for desulfurization and denitrification. The invention further provides the activated carbon for desulfurization and denitrification prepared by the method and application of the activated carbon for desulfurization and denitrification. According to the preparation method, vanadium salt is introduced into the pulverized coal in a liquid form and is evenly distributed; the obtained activated carbon for desulfurization and denitrification is good in effect in desulfurization and denitrification and high in efficiency. The catalyst component is tightly combined with the activated carbon and cannot fall off easily; the activated carbon can be recycled only by regeneration at a relatively low temperature after low-activity sulfate is generated through desulfurization, and the service life is long; and the technological process is simple and the operation is easy.

Description

technical field [0001] The invention belongs to the field of activated carbon, in particular to a preparation method of activated carbon for desulfurization and denitrification, an activated carbon for desulfurization and denitrification and uses thereof. Background technique [0002] Acid rain and acid fog seriously endanger the ecological environment and human health, and a large amount of SO produced by coal combustion 2 and NO x It is the main cause of acid rain and acid fog. [0003] Activated carbon (AC) is widely used as an adsorbent for SO in coal-fired flue gas. 2 and NO x The removal of activated carbon can effectively improve the desulfurization and denitrification activity of activated carbon after loading the catalyst. The supported catalysts with the most research and application are metal catalysts, including CuO, Fe 2 o 3 and ZnO, etc., and the corresponding activated carbon supported catalysts include CuO / AC, Fe 2 o 3 / AC and ZnO / AC etc. In the temp...

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Problems solved by technology

[0004] SO 2 In CuO / AC, Fe 2 o 3 / AC, ZnO / AC and other activated carbon-supported catalysts, the catalyst components are transformed into CuSO 4 , Fe 2 (SO 4 ) 3 , ZnSO 4 Sulfate, block some pores of activated carbon, reduce the effect of activated carbon on SO 2 and these sulfates have low denitrification activity at low temperature (100°C-250°C), thus reducing the denitrification rate of activated carbon; in addition, these sulfates can only be regenerated at higher temperatures (about 600°C) , and the regeneration effect is poor, and the life of activated carbon-supported catalysts is short; most metal catalysts are loaded on activated carbon by impregnation, and they need to be dried after loading. The process is complicated and there is a problem of catalyst falling off

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