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Catalyst for catalytic combustion of nitrogen-containing organic matter and its preparation method and application

A catalytic combustion and catalyst technology, applied in the direction of physical/chemical process catalysts, combustion methods, chemical instruments and methods, etc., can solve the problems of high reaction temperature, poor selectivity, etc., and achieve improved dispersion, improved stability, and improved removal effect Effect

Active Publication Date: 2019-09-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The catalyst requires a high reaction temperature, and the N 2 poor selectivity

Method used

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  • Catalyst for catalytic combustion of nitrogen-containing organic matter and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] γ-Al 2 o 3 Sm 2 o 3 -Al 2 o 3 Composite carrier. Will Sm 2 o 3 -Al 2 o 3 The composite carrier was impregnated in aqueous solution of chloroiridic acid, chloroplatinic acid and chloropalladium acid with Ir concentration of 0.2g / L, Pt concentration of 0.1g / L, and Pd concentration of 0.1g / L. The pH of the solution was 4, and dried at 120°C for 6 Hours, after calcining at 600°C for 3 hours, a catalyst loaded with Ir-Pt-Pd was obtained.

[0025] In the obtained catalyst, Sm 2 o 3 The loading was 1 wt%, the Ir loading was 0.1 wt%, the Pt loading was 0.05 wt%, and the Pd loading was 0.05 wt%. The specific surface area of ​​the obtained catalyst is 190m 2 / g, pore volume 0.5ml / g, acid content in NH 3 - 0.6 mmol / g by TPD method.

Embodiment 2

[0027] γ-Al 2 o 3 Immerse in 5.5g / L indium nitrate aqueous solution for 5 minutes, dry at 100°C for 12 hours, and bake at 500°C for 5 hours to obtain In 2 o 3 -Al 2 o 3 Composite carrier. Will In 2 o 3 -Al 2 o 3 The composite carrier was impregnated in aqueous solution of chloroiridic acid, chloroplatinic acid and chloropalladium acid with Ir concentration of 0.2g / L, Pt concentration of 0.1g / L, and Pd concentration of 0.1g / L. The pH of the solution was 4, and dried at 120°C for 6 Hours, after calcining at 600°C for 3 hours, a catalyst loaded with Ir-Pt-Pd was obtained.

[0028]In the obtained catalyst, In 2 o 3 The loading was 1 wt%, the Ir loading was 0.1 wt%, the Pt loading was 0.05 wt%, and the Pd loading was 0.05 wt%. The specific surface area of ​​the obtained catalyst is 188m 2 / g, pore volume 0.55ml / g, acid content in NH 3 - 0.65 mmol / g calculated by TPD method.

Embodiment 3

[0030] γ-Al 2 o 3 Immerse in 4g / L tin tetrachloride aqueous solution for 5 minutes, dry at 100°C for 12 hours, and bake at 500°C for 5 hours to obtain SnO 2 -Al 2 o 3 Composite carrier. SnO 2 -Al 2 o 3 The composite carrier was impregnated in aqueous solution of chloroiridic acid, chloroplatinic acid and chloropalladium acid with Ir concentration of 0.2g / L, Pt concentration of 0.1g / L, and Pd concentration of 0.1g / L. The pH of the solution was 4, and dried at 120°C for 6 Hours, after calcining at 600°C for 3 hours, a catalyst loaded with Ir-Pt-Pd was obtained.

[0031] In the obtained catalyst, SnO 2 The loading was 1 wt%, the Ir loading was 0.1 wt%, the Pt loading was 0.05 wt%, and the Pd loading was 0.05 wt%. The specific surface area of ​​the obtained catalyst is 191m 2 / g, pore volume 0.6ml / g, acid content in NH 3 - 0.7 mmol / g by TPD method.

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Abstract

The invention relates to a catalytic combustion catalyst for nitrogen-containing organic compound as well as a preparation method and application thereof. The catalytic combustion catalyst for the nitrogen-containing organic compound is characterized in that Al2O3 is taken as a carrier; Ir is taken as an active component; one or several of Sm, In and Sn oxides are taken as the components of an additive; on the basis of the Al2O3, the charge capacity of the active component Ir is 0.1-1wt%, and the charge capacity of the additive is 1-10wt%. The preparation method comprises the following steps: (1) dipping the carrier Al2O3 into a precursor solution of the additives, and drying and roasting to obtain an additive-carrying composite carrier Al2O3, wherein the additive is composed of one or some of Sm, In and Sn oxides; (2) dipping the composite carrier A2lO3 obtained in step (1) into a salt solution containing the active compound, and drying and roasting to obtain the catalyst, wherein the active component is Ir. The method is simple in preparation processes; the prepared catalyst is high in catalyzing combustion activity on nitrogen-containing organic waste gas, high in selectivity and high in stability, and particularly applicable to the treatment of propylene and acrylonitrile containing organic waste gas.

Description

technical field [0001] The invention relates to a catalytic combustion catalyst and its preparation method and application, in particular to a nitrogen-containing organic matter catalytic combustion catalyst and its preparation method and application. Background technique [0002] Nitrogen-containing volatile organic compounds are widely present in the production or use of amines, amides, and nitriles. For example, the acrylonitrile synthesis process mostly uses the propylene ammoxidation process developed by BP. The process exhaust gas mainly contains propylene, propane, carbon monoxide, and acrylonitrile. . Catalytic combustion is an effective means of treating volatile organic waste gas. There are two possibilities for the final product of nitrogen in nitrogen-containing organic compounds, one is N 2 , one is NOx. From the perspective of environmental protection, the formation of NOx should be avoided as much as possible. [0003] CN1034867 discloses a nitrogen-contain...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/63B01J23/62B01J35/10F23G7/07
Inventor 王学海陈高升刘忠生刘淑鹤王宽岭
Owner CHINA PETROLEUM & CHEM CORP
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