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Novel demercuration catalyst

A catalyst and a new type of technology, applied in the field of separation, can solve the problem of easy poisoning of the catalyst, and achieve the effects of reducing equipment cost, high mercury removal and high efficiency

Inactive Publication Date: 2012-11-07
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The main purpose of the present invention is to solve the shortcomings of the existing mercury removal technology, invent a new type of mercury removal catalyst, improve the mercury removal performance, reduce the cost of mercury removal, and solve the shortcoming of catalyst poisoning

Method used

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Examples

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Embodiment Construction

[0033] (1) Put the original montmorillonite ore in the air, add a certain amount of water (the water consumption of 1g montmorillonite is 50-200mL), stir at a high speed to prepare a clay suspension, and add sodium salt (1g montmorillonite The amount of sodium salt solution is 50-200mL), so that the clay is fully dispersed in water, after being fully stirred, it is aged for 2-24 hours, the upper pulp is extracted by siphon method, and the sediment is washed with distilled water until there is no Cl - , and then dried and ground at 50-80°C to obtain purified sodium montmorillonite.

[0034] (2) In the case of vigorous stirring, slowly add n-butyl titanate into absolute ethanol (the molar ratio of butyl titanate to ethanol is 1:1~1:5), and after continuous stirring for 0.5~1h A clear, pale yellow solution A was formed. Another absolute ethanol was added to a concentration of 1mol L -1 in nitric acid (volume ratio of acetic acid to nitric acid = 25:1 to 60:1), and mix well to o...

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Abstract

Disclosed is a novel demercuration catalyst. As mercury has extremely high accumulation performance in the environment and in organisms, it has very strong toxicity for mankind and wild animals and plants even the concentration is very low. In recent years, mercury is considered as another pollution problem in the world. Present existing demercuration catalysts have disadvantages of poor anti-poisoning capability and high cost, and are difficult to realize industrialization. In order overcome these advantages, a novel demercuration catalyst is invented. The product is prepared from TOx (T is Cu, Fe and V) and ROy (R is La and Ce) with the addition of titanium dioxide pillared montmorillonite. The invention belongs to the technical field of separation. The demercuration catalyst can be used for elemental mercury removal from flue gas. The invention is characterized in that the catalyst has high mercury adsorption capability and mercury oxidation catalysis capability. The catalyst has very strong anti-poisoning capability.

Description

technical field [0001] The invention belongs to the technical field of separation and can be used for removing elemental mercury from flue gas. Background technique [0002] In recent years, people have noticed that harmful metal elements produced during coal combustion have a greater impact on the environment, among which mercury is one of the most harmful elements. Because mercury has a particularly high accumulation in the environment and in organisms, it is quite toxic to humans and wildlife even at very low concentrations. The U.S. Environmental Protection Agency defines mercury as a highly hazardous Elements. Coal-fired boilers are the main source of man-made emissions of mercury pollution in the environment (according to data from the U.S. Environmental Protection Agency, about 31% of mercury in the atmosphere comes from coal combustion in coal-fired power plants, and man-made sources of mercury emissions rank first [1] ), which has attracted widespread attention ar...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/22B01D53/86B01D53/64
Inventor 韩粉女许琦仓辉郁桂云蔡照胜陆玉
Owner YANCHENG INST OF TECH
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