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Preparation method and application of catalyst for treating acrylonitrile contained waste gas

A technology for waste gas treatment and acrylonitrile, applied in physical/chemical process catalysts, chemical instruments and methods, combustion methods, etc., can solve problems such as waste gas pollution containing acrylonitrile, achieve high selectivity, low energy consumption, and light-off temperature low effect

Active Publication Date: 2013-07-24
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of this invention is to solve the pollution problem of waste gas containing acrylonitrile, propose a novel catalyst preparation method, select the best catalyst, and adopt catalytic combustion method, acrylonitrile can be directly decomposed into carbon dioxide, nitrogen and water by selective catalytic combustion at a lower temperature

Method used

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  • Preparation method and application of catalyst for treating acrylonitrile contained waste gas
  • Preparation method and application of catalyst for treating acrylonitrile contained waste gas
  • Preparation method and application of catalyst for treating acrylonitrile contained waste gas

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: Measure 60ml of benzyl alcohol and pour it into a 100ml small beaker, add a magnetic stirring bar and stir and heat in a constant temperature magnetic stirrer, and set the temperature to 80°C. Weigh 2.209 grams of lanthanum nitrate and pour it into a small beaker. After it is completely dissolved, add 1.802 grams of iron acetylacetonate. After 20 minutes, the mixed solution is transferred to a high-pressure static reactor. Reactor is put into the oven that temperature is 200 ℃, maintains 24 hours, takes out afterwards. Centrifuge with a centrifuge (8000 rpm, 10 minutes), pour off the upper layer solution, wash with absolute ethanol, and centrifuge twice. The resulting precipitate was mixed with absolute ethanol, transferred to a drying dish, and dried in an oven. Grind the loose powder to make the particles fine enough. Put it into a muffle furnace and bake at 450°C for 6 hours. Finally, the metal oxide LaFeO with perovskite crystal form was obtained 3...

Embodiment 2

[0024] Embodiment 2: LaFeO obtained by the preparation method of catalyst in embodiment 1 3 , under the condition that the volume ratio of acrylonitrile and oxygen is 0.3:1.0, the activity evaluation is carried out, and other conditions are all the same as in Example 1, and the obtained experimental results are shown in Figure 4 .

Embodiment 3

[0025] Embodiment 3: LaFeO obtained by the preparation method of catalyst in embodiment 1 3 , under the condition that acrylonitrile and oxygen volume ratio are 0.3:8.0, carry out activity evaluation, other conditions are all the same as embodiment 1, gained experimental result sees Figure 4 .

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Abstract

The invention discloses a preparation method and application of a catalyst for treating acrylonitrile contained waste gas. The catalyst is characterized in that a metallic oxide with a perovskite crystal form (ABO3) is used as a catalyst, the catalyst suitable for removing the acrylonitrile contained waste gas is synthesized by using a benzoic alcohol synthesis method and through sieving and combining A-site and B-site metal ions, acrylonitrile is converted into nontoxic and harmless products including N2, H2O and CO2 through controlling catalytic combustion process conditions, and particularly, other nitrogen oxides such as NO2, NO and other secondary pollution gases can be prevented from being generated at a high-temperature stage. The catalyst can be applied to the treatment for the acrylonitrile contained waste gas discharged by an acrylonitrile factory and a carbon fiber factory.

Description

technical field [0001] The invention belongs to a preparation method and application of a catalyst for treating waste gas containing acrylonitrile, and specifically relates to a metal composite oxide with a perovskite crystal form for catalytic combustion of waste gas containing acrylonitrile and a preparation method of this type of catalyst. It can be used for the treatment of acrylonitrile-containing waste gas discharged from acrylonitrile factories and carbon fiber factories. Background technique [0002] Because 95% of the current synthesis of acrylonitrile is the propylene ammoxidation process developed by BP. The waste gas of this production process is mainly the tail gas discharged from the absorption tower, which contains toxic components such as propylene, propane, carbon monoxide and trace amounts of acrylonitrile. If it is not treated, it will definitely cause damage to the human body and the environment. At present, the methods for dealing with low-concentration...

Claims

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Application Information

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IPC IPC(8): B01J23/83B01J23/889B01J23/34B01J23/26B01J23/86F23G7/07
Inventor 张润铎陈标华史东军
Owner BEIJING UNIV OF CHEM TECH
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