Preparation method of metal mercury adsorbent, adsorbent and regeneration method

Abstract

The invention discloses a preparation method of a metal mercury adsorbent, the adsorbent and a regeneration method of the adsorbent, and belongs to the technical field of chemical adsorption. The preparation method comprises the following steps: dissolving graphene oxide, at least one compound of elements in the third period and a reducing agent together in an ethanol solution, and carrying out full reactions to obtain a first intermediate product; filtering the first intermediate product to obtain a filtrate; mixing the filtrate with an adhesive, and sequentially carrying out extrusion molding and first drying to obtain a molded material; impregnating the molded material with a solution of elements of the group VI, and carrying out second drying to obtain a second intermediate product; and activating the second intermediate product at a CO2 atmosphere so as to obtain the metal mercury sorbent, wherein the activation temperature is 150-200 DEG C. At the same time, a certain regeneration method can be applied to regenerating an already saturated metal mercury adsorbent.

Description

technical field [0001] The invention relates to the technical field of chemical adsorption, in particular to a preparation method of a metal mercury adsorbent, the adsorbent and a regeneration method. Background technique [0002] With the massive burning of fossil fuels, the problem of mercury pollution is becoming more and more serious. Among them, the flue gas produced by coal-fired power stations is an important source of mercury pollution. There are three main forms of mercury in the flue gas of coal-fired power plants, including gaseous elemental mercury, divalent mercury and particulate mercury. Among them: divalent mercury can be removed through the desulfurization tower, particulate mercury can be captured in the dust collector, but the removal of elemental mercury is particularly difficult. [0003] At present, mercury removal by spraying will bring pressure to the tail dust collector and affect its performance. Although the fixed bed reactor can avoid the impac...

AI Technical Summary

Problems solved by technology

Among them: divalent mercury can be removed through the desulfurization tower, particulate mercury can be captured in the dust collector, but the removal of elemental mercury is particularly difficult

[0003] At present, mercury removal by injection method will bring pressure to the tail dust collector and affect its performance

Although the fixed bed reactor can avoid the impact on the tail dust collector, it consumes a lot of absorbent, is not easy to regenerate, and the cost of mercury removal is high.

When using catalysts to remove mercury, there are clear restrictions on the reaction temperature range

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