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Gas-phase mercury removal agent and preparation method thereof
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A mercury removal, gas phase technology, applied in separation methods, chemical instruments and methods, gas treatment and other directions, can solve the problems of low mercury removal agent accuracy, unstable products, difficult control of preparation methods, etc., and achieve good mercury removal performance, The preparation steps are simple and easy to control, and the effect of good application prospects
Active Publication Date: 2021-06-25
SHENYANG SANJUKAITE CATALYST
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[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects of the mercury removal agent in the prior art, such as low precision, difficult control of the preparation method, unstable product, etc., Thereby provide a kind of vapor phase mercury removal agent and preparation method thereof
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Embodiment 1
[0041] This embodiment provides a method for preparing a gas-phase mercury removal agent, comprising the following steps:
[0042] (1) Add ammonium metavanadate (NH 4 VO 3 ) 118.26g, 28.13g nickelnitrate (Ni(NO 3 ) 2 ·6H 2 O) and 6.03g citric acid (C 6 h 8 o 7 ) and stir evenly, measure 200ml water and 100ml ethanol, mix and stir evenly, then add copper acetate (Cu(CH 3 COO) 2 ·H 2 O) 20.64g, stir and mix evenly. Afterwards, it was stirred at 40°C for 20 minutes, and then aged at 70°C for 24 hours to obtain an impregnation solution.
[0043] (2) Weigh 300.32g titanium dioxide (TiO 2 ) carrier, impregnated into the solution of step (1), stirred evenly, and impregnated for 8 hours.
[0044] (3) The impregnated carrier was dried at 100°C for 2 hours, and then calcined at 400°C for 4 hours to obtain the final vapor phase mercury removal agent.
[0045] figure 2The SEM electronmicroscope image of the gas-phase mercury removal agent provided for this example, it can...
Embodiment 2
[0047] This embodiment provides a method for preparing a gas-phase mercury removal agent, comprising the following steps:
[0048] (1) Add vanadyl sulfate (VOSO 4 ) 163.36g, 130.62g nickel sulfate (NiSO 4 ·6H 2 O) and 10.03g citric acid (C 6 h 8 o 7 ), measure 300ml of water and 300ml of ethanol, mix and stir evenly, then add copper sulfate (CuSO 4 ) 16.24g, stir and mix evenly. Afterwards, it was stirred at 50°C for 30 minutes, and then aged at 80°C for 36 hours to obtain an impregnation solution.
[0049] (2) Weigh 120.04g silicon dioxide (SiO 2 ) carrier, impregnated into the solution of step (1), stirred evenly, and impregnated for 6 hours.
[0050] (3) The impregnated carrier was dried at 120°C for 2.5 hours, and then calcined at 500°C for 5 hours to obtain the final vapor phase mercury removal agent.
Embodiment 3
[0052] This embodiment provides a method for preparing a gas-phase mercury removal agent, comprising the following steps:
[0053] (1) Add vanadium pentoxide (V 2 o 5 ) 181.56g, 75.36g nickel oxide (NiO) and 12.15g citric acid (C 6 h 8 o 7 ), measure 250ml of water and 375ml of ethanol, mix and stir evenly, then add copper nitrate (Cu(NO 3 ) 2 ) 19.65g, stir and mix evenly. Stir at 60°C for 40 minutes, and then age at 90°C for 48 hours to obtain an impregnation solution.
[0054] (2) Weigh 62.56g of alumina (Al 2 o 3 ) carrier, impregnated into the solution of step (1), stirred evenly, and impregnated for 10 hours.
[0055] (3) The impregnated carrier was dried at 150°C for 3 hours, and then calcined at 550°C for 6 hours to obtain the final vapor phase mercury removal agent.
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Abstract
The invention belongs to the technical field of gas-phase mercury removal, and particularly relates to a gas-phase mercury removal agent and a preparation method thereof. Through the synergistic effect of the copperoxide, the nickeloxide and the vanadiumpentoxidemetal group oxide components, the reaction rate of several chemical substances participating in the reaction can be changed, and the conversion from elemental mercury to oxidation-state mercury is facilitated, so that the valence-state mercury is adsorbed to be conveniently removed. Specifically, on the basis of copper oxide, the mercury removal agent has the advantages of low toxicity, low price, simple metalion ligand, uniform particle size dispersion and excellent adsorption performance; The nickel oxide component can introduce a three-dimensional porous structure into the mercury removal agent, so that the specific surface area is increased, the catalytic activity is further improved, the three-dimensional structure is generated in the reaction and is not easily damaged by external force, and the mechanical strength of the mercury removal agent can be properly improved; vanadiumpentoxide can further improve the catalytic performance of the mercury removal agent, meanwhile, vanadiumpentoxide can also oxidize the mercury elementary substance into oxidation-state mercury, so that the mercury elementary substance is easier to remove.
Description
technical field [0001] The invention belongs to the technical field of gas phase mercury removal, and in particular relates to a gas phase mercury removal agent and a preparation method thereof. Background technique [0002] Coal and fossil fuels are the main energy resources. During the combustion of coal, mercury is converted into particulate mercury, gaseous divalent mercury (Hg 2+ ) and elemental mercury (Hg) into the atmosphere, and can stay in the atmosphere for a long time, causing global mercury pollution. [0003] A long time ago, human beings realized that mercury is a poisonous substance. With the massive burning of coal resources, the harm of trace element mercury has attracted more and more attention. Research on mercury removal control technology shows that it is difficult to capture the gaseous elemental mercury in natural gas, oilfield semi-gas, nitrogen and air. The existing relatively successful control method is to use the form conversion of mercury in th...
Claims
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