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

Microwave catalyst for copper molecular sieve and microwave catalytic denitration method

A molecular sieve and catalyst technology, which is applied in the field of copper molecular sieve microwave catalyst and its microwave catalytic denitration, can solve the problems of easy poisoning of the catalyst, failure to meet emission requirements, and low denitration efficiency, and achieves low cost, high conversion rate and low energy consumption. Effect

Inactive Publication Date: 2012-04-11
XIANGTAN UNIV
View PDF4 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its disadvantages: the consumption of reducing agent is large, the catalyst is easily poisoned, the requirements for pipeline equipment are high, and the denitrification efficiency is not high
However, the conversion rate of catalytic decomposition of NO with Cu-ZSM-5 catalyst is up to 70%, and its disadvantages are: the conversion rate of Cu-ZSM-5 catalyst is low, the denitrification efficiency is low, and the emission requirements cannot be met.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Microwave catalyst for copper molecular sieve and microwave catalytic denitration method
  • Microwave catalyst for copper molecular sieve and microwave catalytic denitration method
  • Microwave catalyst for copper molecular sieve and microwave catalytic denitration method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1, using ZSM-5 molecular sieve as a substrate, a copper molecular sieve catalyst was prepared by a microwave solid-phase method.

[0033] See Table 1.

[0034] Weigh Cu(AC) according to the ratio in Table 1 2 Mix it mechanically with HZSM-5 molecular sieve and grind it thoroughly, then put it into the Phoenix microwave muffle furnace produced by CEM company, first heat up to 473K, and then keep the temperature at 473K for 20min. The prepared catalyst is Mcu-HZSM-5 express.

[0035] Cu content on the Cu-ZSM-5 molecular sieve catalyst prepared by table 1 microwave solid phase method

[0036] Cu(AC) 2 Compared with HZSM-5 mass ratio

Embodiment 2

[0038] Copper molecular sieve catalyst was prepared by ion exchange method with ZSM-5 molecular sieve as the substrate.

[0039] The prepared catalyst samples are shown in Table 2. According to Cu(AC) in Table 2 2 Solution concentration, put 15g of HZSM-5 molecular sieve into 1 liter of Cu(AC) 2 In the solution, the pH value was adjusted to 7 with ammonia water, stirred in a water bath at 323K for 12 hours, vacuum filtered, then stirred and washed with deionized water, filtered, dried at 373K for 10 hours, and finally calcined at 773K for 6 hours. Copper molecular sieve catalysts with different Cu contents were prepared respectively; the above samples could also be exchanged several times. The prepared catalyst is represented by L Cu-HZSM-5.

[0040] Cu content on the Cu-ZSM-5 molecular sieve catalyst prepared by the ion exchange method of table 2

[0041]

[0042] *Cu-ZSM-5 molecular sieve catalyst sample was prepared twice by ion exchange method.

Embodiment 3

[0043] Example 3, using ZSM-5 molecular sieve as a substrate, a copper molecular sieve catalyst was prepared by a solid phase dispersion method.

[0044] 10g of Cu(AC) 2After mechanically mixing with 15g of HZSM-5 molecular sieve, it is thoroughly ground, and then calcined in a muffle furnace at 473K for 6h, and the prepared catalyst is represented by SCu-HZSM-5.

[0045] Among the three preparation methods used in the above Examples 1-3, the microwave solid phase reaction method in Example 1 can prepare a catalyst with high copper content, and the solid phase dispersion method in Example 3 has uneven copper dispersion.

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

No PUM Login to View More

Abstract

The invention relates to a microwave catalyst for a copper molecular sieve and a microwave catalytic denitration method. A ZSM molecular sieve, a Y molecular sieve and a beta molecular sieve are taken as substrates for preparing the microwave catalyst for the copper molecular sieve, wherein the mass ratios of copper contents are respectively 2%-12%, 2%-15% and 2%-12%. An ion exchange method, a solid-phase dispersion method and a microwave solid-phase reaction method serve as the preparation method of the microwave catalyst. The microwave catalytic denitration method, to which the microwave catalyst for the copper molecular sieve is applied, comprises the following steps: filling the microwave catalyst for the copper molecular sieve in a reaction tube of a microwave catalytic reactor device, thereby forming a microwave catalytic reaction bed; and then generating a gas-solid reaction by use of a processed gas while passing by the microwave catalytic reaction bed, thereby performing the denitration treatment, wherein the reaction temperature is 150-550 DEG C, and the reaction retention time is 1-5 seconds. Copper oxide is mixed with the microwave catalyst for the copper molecular sieve; the mass ratio of the added copper oxide is 15-45%; activated carbon is mixed with the microwave catalyst; and the mass ratio of the added activated carbon is 5-35%. The microwave catalyst has the advantages of high conversion rate, small energy consumption, energy conservation, environmental friendliness, low cost, and the like.

Description

technical field [0001] The invention relates to a copper molecular sieve microwave catalyst and a microwave catalytic denitrification method thereof. Background technique [0002] With the development of my country's economy, the energy consumption, especially the consumption of fossil energy, has increased significantly. Correspondingly, the degree of air pollution is also increasing day by day, and the energy structure dominated by coal is the main factor affecting the quality of my country's air environment. At present, more than 95% of thermal power plants in my country are mainly coal-fired, and it is difficult to change in the short term. Sulfur dioxide, carbon dioxide, nitrogen oxides and dust emitted during coal combustion account for 87%, 71%, 67% and 60% of my country's emissions, respectively. In our country, the dust has been well controlled and treated; the flue gas desulfurization technology has become more and more mature, and the flue gas desulfurization pr...

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 Applications(China)
IPC IPC(8): B01J23/72B01J19/12B01J8/06B01D53/86B01D53/56
Inventor 周继承王哲王蒙游志敏李虎毛桂月
Owner XIANGTAN UNIV