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Non-metal doped metal oxide denitration catalyst with strong sulfur tolerance and preparation method thereof

A denitration catalyst and non-metallic technology, applied in the field of metal oxide denitration catalyst and its preparation, can solve the problems of catalyst poisoning and deactivation, and achieve the effects of excellent medium and high temperature activity, simple preparation method, and excellent cycle stability

Active Publication Date: 2020-08-14
SHANGHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problems of the prior art, the object of the present invention is to overcome the deficiencies of the prior art, provide a non-metal-doped metal oxide denitration catalyst with strong sulfur resistance and its preparation method, and overcome the technical problems of the existing denitration catalyst , especially to overcome the traditional denitrification catalyst in the catalyst working temperature range and SO 2 The problem of catalyst poisoning and deactivation in the existing atmosphere

Method used

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  • Non-metal doped metal oxide denitration catalyst with strong sulfur tolerance and preparation method thereof

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Effect test

Embodiment 1

[0033]In this embodiment, a method for preparing a non-metal-doped metal oxide denitration catalyst with strong sulfur resistance comprises the following steps:

[0034] a. Dissolve 5mL of tetraisopropyl titanate in 50mL of isopropanol, and keep stirring for 10min (solution A);

[0035] b. Weigh a certain amount of thiourea (atomic ratio: S / Ti=1 / 100-1 / 5) and ultrasonically dissolve it in 25 mL of isopropanol, and add 1.5 mL of ionized water and 0.15 mL of nitric acid (solution B) ;

[0036] c. Add solution B dropwise to solution A, keep stirring for 3 hours to obtain a sol, and leave it to age overnight to obtain a gel;

[0037] d. Place the obtained gel in an oil bath at 65°C, dry it for 24 hours, grind the obtained product, put it in a muffle furnace, raise the temperature to 500°C at 5°C / min, and then keep it at 500°C for 3 hours to obtain non-metallic doping metal oxide carrier;

[0038] e. Weigh a certain amount of manganese nitrate (1-10wt%) and dissolve it in an appr...

Embodiment 2

[0042] This embodiment is basically the same as Embodiment 1, and the special features are:

[0043] In this embodiment, a method for preparing a non-metal-doped metal oxide denitration catalyst with strong sulfur resistance comprises the following steps:

[0044] a. Dissolve 5mL of tetraisopropyl titanate in 50mL of isopropanol, and keep stirring for 10min (solution A);

[0045] b. Weigh a certain amount of thiourea (atomic ratio: S / Ti=1 / 100-1 / 5) and ultrasonically dissolve it in 25 mL of isopropanol, and add 1.5 mL of ionized water and 0.15 mL of nitric acid (solution B) ;

[0046] c. Add solution B dropwise to solution A, keep stirring for 3 hours to obtain a sol, and leave it to age overnight to obtain a gel;

[0047] d. Place the obtained gel in an oil bath at 65°C, dry it for 24 hours, grind the obtained product, put it in a muffle furnace, raise the temperature to 500°C at 5°C / min, and then keep it at 500°C for 3 hours to obtain non-metallic doping metal oxide carrie...

Embodiment 3

[0052] This embodiment is basically the same as the previous embodiment, and the special features are:

[0053] In this embodiment, a method for preparing a non-metal-doped metal oxide denitration catalyst with strong sulfur resistance comprises the following steps:

[0054] a. Dissolve 5mL of tetraisopropyl titanate in 50mL of isopropanol, and keep stirring for 10min (solution A);

[0055] b. Weigh a certain amount of thiourea (atomic ratio: S / Ti=1 / 100-1 / 5) and ultrasonically dissolve it in 25 mL of isopropanol, and add 1.5 mL of ionized water and 0.15 mL of nitric acid (solution B) ;

[0056] c. Add solution B dropwise to solution A, keep stirring for 3 hours to obtain a sol, and leave it to age overnight to obtain a gel;

[0057] d. Place the obtained gel in an oil bath at 65°C, dry it for 24 hours, grind the obtained product, put it in a muffle furnace, raise the temperature to 500°C at 5°C / min, and then keep it at 500°C for 3 hours to obtain non-metallic doping metal o...

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Abstract

The invention discloses a non-metal doped metal oxide denitration catalyst with strong sulfur tolerance and a preparation method thereof. The denitration catalyst is mainly prepared by the following steps: using a sol-gel method to prepare a metal oxide, adding a non-metal element precursor in the gelling process, and then obtaining the non-metal doped metal oxide through high temperature calcination, and finally loading 10wt% of an active metal component on the non-metal doped metal oxide to obtain the catalyst. The catalyst provided by the invention has the advantages of excellent medium-high temperature activity, excellent cycling stability, simple preparation method, extremely strong sulfur poisoning resistance and the like, and can be used for catalytic treatment of nitrogen oxides intail gas generated by various stationary pollution sources of coal-fired power plants, waste incineration boilers, steel mills, cement plants and the like. The preparation method is simple and low-cost.

Description

technical field [0001] The invention relates to a denitration catalyst and a preparation method thereof, in particular to a metal oxide denitration catalyst and a preparation method thereof, which are applied in the technical field of nitrogen oxide control and purification in environmental protection. Background technique [0002] In recent years, with the rapid development of my country's economy, the adjustment of industrial structure and the people's continuous pursuit of quality of life, the problem of environmental pollution has gradually become one of the major problems to be solved in my country's all-round development strategy. Among many pollutants, nitrogen oxides (NO x ) will cause various pollution phenomena such as smog, acid rain, photochemical smog, etc., and pose a major threat to the stability of the ecosystem and the health of human beings. In recent years, my country has promulgated a number of corresponding laws and regulations to control NO x emission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J23/34B01J23/648B01J23/652B01J23/72B01J23/745B01J27/24B01J37/03B01J37/08B01D53/86B01D53/56
CPCB01J23/34B01J23/10B01J23/745B01J23/72B01J23/6482B01J23/6525B01J27/24B01J37/036B01J37/08B01D53/8628
Inventor 张登松王芃芦刘向宇颜婷婷张剑平
Owner SHANGHAI UNIV
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