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Method for removing mercury vapor in gas

A mercury vapor and gas technology, which is applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of catalyst poison, harmful to human body, animals and plants, and corrosion of pipelines, etc., and achieves the effect of high removal rate

Inactive Publication Date: 2008-11-26
OSAKA GAS CHEM KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Electrolyzed hydrogen containing mercury vapor tends to be a catalyst poison if used in chemical synthesis
In addition, mercury vapor in natural gas corrodes aluminum parts in pipes and heat exchange equipment during the gas liquefaction process, which can cause serious accidents
Incinerator exhaust gas and exhaust gas from coal-fired boilers often contain sulfur oxides and nitrogen oxides as well as mercury vapor, which causes air pollution and is harmful to humans, animals and plants

Method used

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  • Method for removing mercury vapor in gas
  • Method for removing mercury vapor in gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] 5 g of potassium iodide was dissolved in 40 g of distilled water to prepare a potassium iodide aqueous solution. The specific surface area measured by BET method is 1130m 2 / g, the average pore diameter is 1.71nm, the pore volume is 0.482ml / g, the water retention rate is 42%, and the crushed coconut shell activated carbon 100g of the particle diameter is 0.71~1.00mm is packed in the polypropylene container, while using While agitating with a table mixer (100-300rpm), all of the potassium iodide aqueous solution prepared in advance was sprayed and attached at 25°C, and then dried at 110°C to obtain an adsorbent composed of activated carbon loaded with potassium iodide.

Embodiment 2

[0059] 10 g of potassium iodide was dissolved in 40 g of distilled water to prepare a potassium iodide aqueous solution. The crushed coconut shell activated carbon 100g that is used in the embodiment 1 is packed in the polypropylene container, stirs (100~300rpm) with the desktop mixer on the one hand, all the potassium iodide aqueous solution prepared in advance is sprayed on one side, then under 110 ℃ After drying, an adsorbent consisting of activated carbon loaded with potassium iodide was obtained.

Embodiment 3

[0061] 20 g of potassium iodide was dissolved in 40 g of distilled water to prepare a potassium iodide aqueous solution. The crushed coconut shell activated carbon 100g that is used in the embodiment 1 is packed in the polypropylene container, stirs (100~300rpm) with the desktop mixer on the one hand, all the potassium iodide aqueous solution prepared in advance is sprayed on one side, then under 110 ℃ After drying, an adsorbent consisting of activated carbon loaded with potassium iodide was obtained.

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Abstract

If oxysulfide is present in the gas including mercury vapor, the adsorption of active carbon on the mercury vapor is baffled. Therefore, it can be hoped that a method is provided, wherein mercury vapor can be effectively adsorbed even if oxysulfide coexists. According to the invention, the mercury vapor of the gas including oxysulfide is contacted with an active carbon adsorbent made by attaching5-70 amounts by weight of alkali halide in 100 amounts by weight of active carbon, thereby effectively removing mercury vapor for a long time.

Description

technical field [0001] The present invention relates to a mercury vapor removal method for efficiently adsorbing and removing mercury vapor from a gas containing both sulfur oxides and mercury vapor. Background technique [0002] Mercury vapor is often contained in electrolytic hydrogen, natural gas, incinerator exhaust gas, and exhaust gas from factories that use mercury. Electrolyzed hydrogen containing mercury vapor tends to be a catalyst poison if used in chemical synthesis. In addition, mercury vapor in natural gas corrodes aluminum parts in pipes, heat exchange equipment, etc. during the gas liquefaction process, and may cause serious accidents. Incinerator exhaust gas and exhaust gas from coal-fired boilers often contain sulfur oxides and nitrogen oxides as well as mercury vapor, which causes air pollution and is harmful to humans, animals and plants. [0003] As activated carbon for mercury removal in gases containing mercury vapor, activated carbons loaded with al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04B01D53/64B01J20/20
CPCB01D2257/302B01D2253/102B01D53/02B01D2257/602B01J20/046B01J20/20B01J20/3204B01J20/3236
Inventor 木村俊雄福永哲也古川圭三
Owner OSAKA GAS CHEM KK
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