Unlock instant, AI-driven research and patent intelligence for your innovation.

A catalyst for denitrification and demercuration of coal-fired flue gas and its preparation method and application

A coal-fired flue gas and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of industrialization difficulties, catalysts are easy to poison, high cost and difficult industrialization, etc., and achieve high efficiency and reduce equipment cost effect

Active Publication Date: 2017-09-15
江苏昆仑互联科技有限公司
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, SCR catalysts are mainly used in flue gas denitrification in industry. Metal oxides need to be loaded on a carrier to remove mercury. The commonly used carriers are titanium dioxide, silicon dioxide, and activated carbon. However, this type of catalyst is easy to be poisoned and difficult to regenerate. , the cost is too high to achieve industrialization
The mercury removal rate of photocatalyst reaches 99%, but the cost of this technology is higher than that of activated carbon mercury removal technology, so the industrialization of this technology is more difficult

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: MnO 2 -MoO 3 / ATP preparation

[0037] (1) Weigh 20g of attapulgite (ATP) into 200mL of distilled water and stir evenly. Under the action of a certain temperature and high shear force, add a certain concentration of sodium hexametaphosphate aqueous solution. After stirring for a period of time, the mixed solution Perform ultrasonic dispersion for a certain period of time, let stand, decant the supernatant suspension, centrifuge the obtained solid, wash it with double distilled water until it is neutral, and dry it at a certain temperature to obtain pure attapulgite.

[0038] (2) Weigh 4g of pure attapulgite and 0.4mmol of ammonium molybdate into 100ml of distilled water and stir evenly, then add 0.08mmol of cetyltrimethylammonium bromide and stir well, then adjust the pH value to 3.5 with glacial acetic acid , and then use nitric acid to bring the pH value to 1, stir for 10 minutes, and ultrasonically oscillate for 30 minutes.

[0039] (3) Add 0.5 g of sod...

Embodiment 2

[0048] Example 2: CeO 2 -MoO 3 / ATP preparation

[0049] (1) Weigh 20g of attapulgite (ATP) into 200mL of distilled water and stir evenly. Under the action of a certain temperature and high shear force, add a certain concentration of sodium hexametaphosphate aqueous solution. After stirring for a period of time, the mixed solution Perform ultrasonic dispersion for a certain period of time, let stand, decant the supernatant suspension, centrifuge the obtained solid, wash it with double distilled water until it is neutral, and dry it at a certain temperature to obtain pure attapulgite.

[0050] (2) Weigh 4g of pure attapulgite and 0.4mmol of ammonium molybdate into 100ml of distilled water and stir evenly, then add 0.08mmol of cetyltrimethylammonium bromide and stir well, then adjust the pH value to 3.5 with glacial acetic acid , and then use nitric acid to bring the pH value to 1, stir for 10 minutes, and ultrasonically oscillate for 30 minutes.

[0051] (3) Add 0.5 g of sod...

Embodiment 3

[0060] Example 3: ZrO 2 -MoO 3 / ATP preparation

[0061] (1) Weigh 20g of attapulgite (ATP) into 200mL of distilled water and stir evenly, under the action of a certain temperature and high shear force, add a certain concentration of sodium hexametaphosphate aqueous solution, after stirring for a period of time, the mixed solution Perform ultrasonic dispersion for a certain period of time, let stand, decant the upper suspension, centrifuge the obtained solid, wash it with double distilled water to neutrality, and dry it at a certain temperature to obtain pure attapulgite.

[0062] (2) Weigh 4g of pure attapulgite and 0.4mmol of ammonium molybdate into 100ml of distilled water and stir evenly, then add 0.08mmol of cetyltrimethylammonium bromide and stir well, then adjust the pH value to 3.5 with glacial acetic acid , and then use nitric acid to bring the pH value to 1, stir for 10 minutes, and ultrasonically oscillate for 30 minutes.

[0063] (3) Add 0.5 g of sodium acetate,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to View More

Abstract

The present invention provides a fire coal flue gas denitration demercuration catalyst and a preparation method and application thereof, and the catalyst is a composite catalyst mainly prepared by using attapulgite as a carrier and loading molybdenum trioxide and a mesoporous metal oxide TOX. Compared with the prior art, a modified SCR catalyst is supported on the attapulgite, and used for fire coal flue gas denitration demercuration; the cheap attapulgite is used for replacement of expensive activated carbon, titanium dioxide and the like as the catalyst carrier; the catalyst has high denitration demercuration efficiency in a low temperature region; and when the catalyst is used in denitration demercuration, SCR denitration equipment can be used, and equipment cost can be reduced.

Description

technical field [0001] The invention relates to a coal-fired flue gas denitrification and mercury removal catalyst, a preparation method and application thereof, and belongs to the technical field of denitrification and mercury removal catalysts. Background technique [0002] In recent years, people have noticed that some substances produced during coal combustion have a greater impact on the environment, and these substances include mercury and nitrogen oxides. Coal-fired boilers, as the main anthropogenic source of mercury pollution in the environment, have attracted widespread attention worldwide. Sulfur dioxide and nitrogen oxides produced by coal burning are one of the main causes of "acid rain" and "acid smog", and the highly toxic mercury is also one of the toxic factors in haze weather. 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. Environme...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J23/28B01D53/86B01D53/56B01D53/64
CPCB01D53/8628B01D53/8665B01D2257/602B01J23/28B01J23/34
Inventor 韩粉女许琦唐喆
Owner 江苏昆仑互联科技有限公司