Supported mercury remover and preparation method thereof

A supported, mercury-removing technology, applied in separation methods, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of low mercury-removing treatment efficiency, low mercury capacity, etc., and achieve the effect of simple preparation method and low cost

Active Publication Date: 2013-12-04
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the metal sulfide mercury removal agent in the prior art has low mercury capac...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Immerse the φ3-5mm porous silica gel pellet carrier in FeSO 4 After 10 hours in the solution, the loaded FeSO 4 The carrier is immersed in sodium hydroxide solution to adjust the pH value of the solution to 6-8, and then washed with water until there is no SO 4 2- , and then air was introduced for oxidation, and then dried at 70° C. for 5 hours to obtain silica loaded with amorphous FeOOH.

[0035] The silica loaded with amorphous FeOOH is filled in the bed of the fixed bed reactor, and the gas containing hydrogen sulfide is passed into the reactor to presulfurize the amorphous FeOOH / silicon dioxide fixed bed at 80°C , FeSSH (iron mercaptosulfide) / silica mercury removal agent 1 is obtained after presulfurization, wherein the content of FeSSH is 20wt%, and the content of silicon dioxide is 80wt%.

Embodiment 2

[0037] Immerse a φ4mm spherical alumina carrier in Al 2 (SO 4 ) After 5 hours in the 3 solution, take out the loaded Al 2 (SO 4 ) 3 The carrier is immersed in potassium hydroxide solution to adjust the pH value of the solution to 6-8, and then washed with water until no SO 4 2- , and then dried at 60°C for 8 hours to obtain alumina loaded with AlOOH.

[0038] Fill the AlOOH-loaded alumina in the bed of the fixed-bed reactor, and pass the gas containing hydrogen sulfide into the reactor to pre-sulfurize the AlOOH / alumina fixed bed at 20°C, and obtain AlSSH after pre-sulfurization (Aluminum mercaptosulfide) / alumina mercury removal agent 2, wherein the content of AlSSH is 90wt%, and the content of alumina is 10wt%.

Embodiment 3

[0040] Immerse the φ4mm silicon-aluminum ball carrier in CrSO 4 After 6 hours in the solution, the loaded CrSO 4The carrier is immersed in sodium hydroxide solution to adjust the pH value of the solution to 6-8, and then washed with water until there is no SO 4 2- , and then air was introduced for oxidation, and then dried at 50° C. for 10 hours to obtain CrOOH-loaded silica-alumina pellets.

[0041] Fill the silicon-alumina pellets loaded with CrOOH in the bed of a fixed-bed reactor, and feed gas containing hydrogen sulfide into the reactor to pre-sulfurize the fixed bed of CrOOH / silicon-aluminum pellets at 110°C. After sulfidation, a CrSSH (chromium mercaptosulfide) / silicon aluminum pellet mercury remover 3 was obtained, wherein the content of CrSSH was 60wt%, and the content of aluminosilicate was 40wt%.

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Abstract

The invention discloses a supported mercury remover. The active components at least comprise MSSH and carriers, wherein M is a metal which can generate a trivalent ion. The invention further discloses a preparation method of the mercury remover on the basis of the disclosure of the mercury remover. The mercury remover has a very high binding force for mercury, the binding strength between the mercury remover and mercury is stronger than that between the metal sulfide and mercury, and thus the problem of low utilization rate of metal sulfide in the mercury removing process, causing by the bad binding force between the metal sulfide and mercury and low mercury capacity during the mercury removing process, is solved.

Description

technical field [0001] The invention relates to a loaded mercury removal agent and a preparation method thereof, belonging to the technical field of mercury removal agents. Background technique [0002] Industrial gases such as coke oven gas, water gas and natural gas all contain mercury. Mercury has become the most concerned atmospheric poison after sulfur dioxide and nitrogen oxides due to its high toxicity, volatility, persistence and deposition in organisms. pollutants. Mercury causes great harm to organisms and the environment. This is because organisms absorb mercury and react in the body to form highly toxic methylmercury. Methylmercury will combine with sulfhydryl groups of enzymes to form thiolates, resulting in enzyme activity. Inhibited, thereby destroying the basic metabolic functions of biological cells. In addition, methylmercury can also change the permeability of cells, destroy the ion balance in cells, inhibit nutrients from entering cells, and cause cell ...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/64
Inventor 刘振义林科黄波
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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