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A carbon nanotube-doped copper-aluminum composite metal oxide denitration catalyst and its preparation method and application

A technology of denitrification catalyst and carbon nanotubes, which is applied in the field of CuAl-LDO/CNTs denitration catalyst, catalyst and its preparation, can solve the problems of poor water resistance and sulfur resistance, narrow active window, etc., so as to slow down the poisoning effect and enhance the resistance The effect of water resistance to sulfur

Active Publication Date: 2021-02-09
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Recently, Chinese patent (CN201610671758.7) reported that compared with supported CuO / γ-Al 2 o 3 , Cu prepared by calcination of CuAl hydrotalcite-like precursor x AlO y With better low temperature NH 3 - SCR catalytic activity, but problems such as narrow activity window and poor water and sulfur resistance performance still need to be further optimized and solved

Method used

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  • A carbon nanotube-doped copper-aluminum composite metal oxide denitration catalyst and its preparation method and application
  • A carbon nanotube-doped copper-aluminum composite metal oxide denitration catalyst and its preparation method and application
  • A carbon nanotube-doped copper-aluminum composite metal oxide denitration catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Take 20ml respectively and the concentration is 0.5 mol L -1 Aqueous solution of aluminum nitrate nonahydrate and 20ml concentration of 1.0 mol L -1 Add the copper nitrate trihydrate aqueous solution to the beaker, and stir with a magnetic stirrer for 10min to make it evenly mixed, and transfer the prepared salt solution to the dropping funnel 1 for later use;

[0037] (2) Take 200ml and make the concentration 1.00 mol L -1 aqueous sodium hydroxide solution, which is transferred to the dropping funnel 2 for later use;

[0038] (3) Take 8ml and the concentration is 30 g L -1The oxidized carbon nanotube dispersion liquid is placed in a beaker, and the sodium hydroxide aqueous solution and the mixed salt solution are dropped into the above dispersion liquid at the same time under magnetic stirring, and the pH value during the titration process is monitored in real time with an acidity meter, and the titration speed is controlled to make the whole reaction During the...

Embodiment 2

[0042] (1) Take 20ml respectively and the concentration is 0.5 mol L -1 Aqueous solution of aluminum nitrate nonahydrate and 30ml concentration of 1.0 mol L -1 Add the copper nitrate trihydrate aqueous solution to the beaker, and stir it with a magnetic stirrer for 10 min to make it evenly mixed, and transfer the prepared salt solution to the dropping funnel 1 for later use;

[0043] (2) Take 200ml and make the concentration 1.00 mol L -1 aqueous sodium hydroxide solution, which is transferred to the dropping funnel 2 for later use;

[0044] (3) Take 25ml and the concentration is 30 g L -1 The oxidized carbon nanotube dispersion liquid is placed in a beaker, and the sodium hydroxide aqueous solution and the mixed salt solution are dropped into the above dispersion liquid at the same time under magnetic stirring, and the pH value during the titration process is monitored in real time with an acidity meter, and the titration speed is controlled to make the whole reaction proce...

Embodiment 3

[0048] (1) Weigh 20ml respectively to a concentration of 0.5 mol L -1 The concentration of aluminum nitrate nonahydrate aqueous solution and 40ml is 1 mol L -1 Copper nitrate trihydrate was mixed into the beaker, and stirred with a magnetic stirrer for 10 min to make it evenly mixed, and the prepared salt solution was transferred to the dropping funnel for later use

[0049] (2) Take 200ml and make the concentration 1.00 mol L -1 aqueous sodium hydroxide solution, which is transferred to the dropping funnel for use;

[0050] (3) Take 60ml of concentration to be 30 g L -1 The oxidized carbon nanotube dispersion liquid is placed in a beaker, and the sodium hydroxide aqueous solution and the mixed salt solution are dropped into the above dispersion liquid at the same time under magnetic stirring, and the pH value during the titration process is monitored in real time with an acidity meter, and the titration speed is controlled to make the whole reaction During the process, the...

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Abstract

The invention discloses a carbon nanotube-doped copper-aluminum composite metal oxide denitrification catalyst and a preparation method and application thereof, which belong to the field of pollution control and technology. The catalyst is made by adding the mixed salt solution of aluminum nitrate and copper nitrate and NaOH alkali solution dropwise to the dispersion liquid mixed with modified carbon nanotubes, controlling the synthesis pH in the range of 4.50 to 5.50, hydrothermal crystallization, pumping The carbon nanotube-doped CuAl hydrotalcite-like precursor (CuAl‑LDH / CNTs) was prepared by filtration, washing and drying; then it was roasted under a nitrogen atmosphere to prepare a carbon nanotube-doped copper-aluminum composite metal oxide denitrification catalyst (CuAl‑LDH / CNTs). LDO / CNTs); denitrification activity test and sulfur resistance performance evaluation show that CuAl‑LDO / CNTs catalyst has high NH 3 ‑SCR activity, good N 2 Selectivity and strong water and sulfur resistance.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst for low-temperature NH 3 - CuAl-LDO / CNTs denitrification catalyst for SCR reaction, belonging to the technical field of pollution prevention and control. Background technique [0002] Along with the treatment and research of coal-fired flue gas, the catalytic denitrification technology of coal-fired flue gas has been developed rapidly. Ammonia Selective Catalytic Reduction (NH 3 -SCR) has become the most promising coal-fired flue gas denitrification technology in commerce due to its high efficiency, good selectivity, and low cost. However, the mature V 2 o 5 -WO 3 / TiO 2 The high working temperature of denitrification catalysts (300-400 ℃) cannot well meet the denitrification technical requirements of small and medium-sized industrial boilers. Therefore, the development of efficient, stable and environmentally friendly low-temperature denitrificatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72B01D53/86B01D53/56
CPCB01D53/8628B01D2258/0283B01J23/72
Inventor 吴旭孟浩刘江宁侯本辉次超
Owner TAIYUAN UNIV OF TECH
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