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Iodized activated carbon and preparation method and application thereof

A kind of activated carbon preparation and activated carbon technology, which is applied in the direction of chemical instruments and methods, separation methods, and other chemical processes, can solve the problems of large usage, and achieve the effects of low cost, increased specific surface area, and simple process methods

Inactive Publication Date: 2014-04-16
NANJING ASSEN ENVIRONMENT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the amount of mercury adsorption tubes used in the EPA30B method is replaced every time a sample is collected, and two adsorption tubes are required for each set of data to be tested. In order to meet the sampling quality control requirements, at least 3 sets of data need to be collected at the same measuring point, that is, 6 tubes are required Adsorption tubes, used in large quantities

Method used

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  • Iodized activated carbon and preparation method and application thereof
  • Iodized activated carbon and preparation method and application thereof
  • Iodized activated carbon and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0020] Crushed and dried activated carbon, select activated carbon particles with a particle size of 20-200 mesh and a background mercury content of <10ng / g (ng nanograms) for use. Weigh 10g of activated carbon particles and place them in a beaker, add 200ml of 0.1mol / L nitric acid solution to soak the activated carbon particles for 24 hours, then wash the soaked activated carbon with distilled water until the pH of the effluent is 6. Dry at 105°C for later use.

[0021] The compound iodine solution that adopts the compound iodine solution that contains iodine mass percent concentration 0.01% carries out activated carbon iodination treatment, to strengthen the adsorption capacity of mercury of activated carbon, concrete operation steps are as follows: the preparation of compound iodine solution: according to mass ratio, i.e. M 1 (Iodine): M 2 (Sodium iodide) = 1:0.8 mass ratio to configure 250ml of compound iodine solution with a mass concentration of 0.01%, soak the activate...

Embodiment 2

[0028] Crushed and dried activated carbon, selected activated carbon particles with a particle size of 20 to 200 mesh for future use. Weigh 10g of activated carbon particles and place them in a beaker, add 200ml of 0.1mol / L nitric acid solution to soak the activated carbon particles for 24 hours, then wash the soaked activated carbon with distilled water until the pH of the effluent is 6. Dry at 105°C for later use.

[0029] The compound iodine solution that adopts the compound iodine solution that contains the mass percent concentration 0.01% of iodine to carry out gac iodination treatment, to strengthen the adsorption capacity of mercury of gac, concrete operation step is as follows: the preparation of compound iodine solution: the preparation of compound iodine solution: according to M 1 (Iodine): M 2 (Sodium iodide) = 1:1.5 mass ratio to configure 250ml of compound iodine solution with a mass concentration of 0.01%, soak the activated carbon in the compound iodine solutio...

Embodiment 3

[0036]Crushed and dried activated carbon, selected activated carbon particles with a particle size of 20 to 200 mesh for future use. Weigh 10g of activated carbon particles and place them in a beaker, add 200ml of 0.1mol / L nitric acid solution to soak the activated carbon particles for 24 hours, then wash the soaked activated carbon with distilled water until the pH of the effluent is 6. Dry at 105°C for later use.

[0037] The compound iodine solution that adopts the compound iodine solution that contains the mass percent concentration 0.01% of iodine to carry out gac iodination treatment, to strengthen the adsorption capacity of mercury of gac, concrete operation step is as follows: the preparation of compound iodine solution: the preparation of compound iodine solution: according to M 1 (Iodine): M 2 (sodium iodide) = 1:3 mass ratio to configure 250ml of compound iodine solution with a mass concentration of 0.01%, soak the activated carbon in the compound iodine solution a...

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Abstract

The invention discloses iodized activated carbon and a preparation method and application thereof and belongs to the field of preparation of activated carbon. The preparation method for the iodized activated carbon comprises the steps of treating the activated carbon by a pickling treatment mode and iodizing the activated carbon by using an iodine compound. The application method of the iodized activated carbon comprises the steps of canning the iodized activated carbon into a hollow pipe, wherein the bottom and the top of the hollow pipe are not sealed; filling the front end and the rear end of the activated carbon with glass fiber cotton in order to prevent leakage of the iodized activated carbon, wherein a mutual isolation function is realized during filling of multiple sections of the activated carbon. Due to the adsorption performance of the activated carbon to mercury in smoke, a mercury adsorption pipe can be applied to smoke monitoring and has the same performance as that of a foreign imported adsorption pipe, and the cost is low; the adsorption performance of the adsorption pipe can meet a technical requirement of EPA30B. The technical method is simple, is easy to operate and is low in cost and is suitable for monitoring the mercury in the smoke of a fixed pollution source.

Description

technical field [0001] The invention relates to an iodized activated carbon and its preparation method and application, in particular to being used for absorbing and collecting total gaseous mercury in flue gas and applied to flue gas mercury monitoring equipment of fixed pollution sources. Background technique [0002] Mercury is listed as a global pollutant by the United Nations Environment Programme, which has the attribute of transnational pollution and has become one of the environmental pollutants of global concern. Mercury pollution is a problem in the United States, Europe, Africa and Asia, and even the sparsely populated Arctic is threatened by mercury pollution. [0003] Mercury emissions mainly come from natural sources and anthropogenic sources. Combustion of fossil fuels (mainly coal) is the most important source of anthropogenic mercury emissions to the atmosphere, accounting for about 45.6% of global mercury emissions. Mercury is volatile. During the combusti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/81B01D53/64
Inventor 刘德允陈莹范黎锋陈清李浙英
Owner NANJING ASSEN ENVIRONMENT TECH
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