Catalyst for catalytic oxidization of volatile organic compound, as well as preparation method of catalyst

A volatile organic compound, catalytic oxidation technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., to achieve the effect of eliminating steric reaction steric hindrance, large specific surface area, and reducing resistance

Active Publication Date: 2014-12-03
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for general catalysts to achieve good catalytic activity at high space velocities.

Method used

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  • Catalyst for catalytic oxidization of volatile organic compound, as well as preparation method of catalyst
  • Catalyst for catalytic oxidization of volatile organic compound, as well as preparation method of catalyst
  • Catalyst for catalytic oxidization of volatile organic compound, as well as preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Preparation of hierarchically porous KIT-6 molecular sieve carrier with macroporous-mesoporous structure

[0018] Dissolve 1g P123 and 1g n-butanol in a mixed solution of 36mL deionized water and 1.9g hydrochloric acid (37wt%), stir at 35°C until P123 is completely dissolved; The mass ratio of tetraethyl ester (TEOS) was 0.3:1, and 0.645 g of polystyrene microspheres (PS) was added thereto. After the PS was completely dissolved in the solution, 2.15 g of TEOS was added, kept stirring for 24 h, and then transferred to a reactor for crystallization at 100 ° C for 24 h. They were washed and filtered with deionized water and ethanol respectively, dried in an oven, and finally calcined at 550° C. for 5 hours in an air atmosphere. The hierarchically porous KIT-6 molecular sieve carrier with macropore-mesoporous structure can be obtained, which is marked as MMK-1.

[0019] (2) Preparation of Pt-supported Hierarchical Porous KIT-6 Catalyst

[0020] Using the impregnation...

Embodiment 2

[0024] Prepare 0.7wt.% Pt loaded hierarchical porous KIT-6 catalyst according to the method for example 1, difference is, the mass ratio that changes polystyrene microsphere (PS) and tetraethyl orthosilicate (TEOS) is 1: 1. The obtained catalyst is marked as 0.7wt.%Pt / MMK-2.

[0025] Catalyst carries out active measurement on the device described in above-mentioned embodiment 1, and the result shows that the catalyst that embodiment 2 makes is the gas (all the other gas components 21% O 2 and 79%N 2 ), at a reaction space velocity of 80,000h -1 The temperature for complete catalytic oxidation is 265°C.

Embodiment 3

[0027] Prepare 0.3wt.% Pt loaded hierarchical porous KIT-6 catalyst according to the method of Example 1, the difference is that the mass ratio of polystyrene microspheres (PS) to tetraethyl orthosilicate (TEOS) is 2:1 , the obtained catalyst is labeled as 0.3wt.%Pt / MMK-3.

[0028] Catalyst carries out active measurement on the device described in above-mentioned embodiment 1, and the result shows that the gas (all the other gas components 21% O 2 and 79%N 2 ), at a reaction space velocity of 80,000h -1 The temperature for complete catalytic oxidation is 263°C.

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Abstract

The invention provides a catalyst for catalytic oxidization of a volatile organic compound, as well as a preparation method of the catalyst. An active component of the catalyst is Pd or Pt, a carrier is a hierarchical porous SBA-15 or KIT-6 and other molecular sieves with a macroporous-mesoporous structure. The carrier is prepared by adopting a soft-hard template method, and the active component is loaded on the carrier by adopting a sol-gel method or a steeping method. The catalyst has a large specific surface area, an orderly hierarchical porous structure, and high catalytic oxidization activity on volatile organic matters such as p-xylene, toluene and benzene at high space velocity.

Description

technical field [0001] The invention relates to a catalyst for catalytic oxidation of volatile organic compounds, in particular to a multi-level porous catalyst for catalytic oxidation of volatile organic compounds at high space velocity. Background technique [0002] Volatile Organic Compounds (VOCs for short) is a general term for a class of organic compounds. It is volatile under normal temperature and pressure, most of them are poisonous and harmful, and they generally exist indoors and outdoors, causing serious harm to the environment and humans. Volatile organic compounds mainly include volatile pollutants such as hydrocarbons, aldehydes, ketones, and esters, among which benzene series (such as benzene, toluene, and xylene) belonging to aromatic hydrocarbons are particularly harmful. It mainly comes from waste gas emitted by industries such as petrochemical, steel manufacturing, pharmaceutical, printing or painting. Due to its volatile characteristics, it not only ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/035B01J29/74B01D53/86B01D53/44B01D53/72
Inventor 郝郑平乔南利张鑫程杰俞小源
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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