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A kind of preparation method of zeolite hydrocarbon adsorption reforming catalyst

A reforming catalyst, hydrocarbon technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of low desorption temperature, inability to meet the emission reduction requirements of motor vehicles, and no catalytic effect, etc. Achieve high desorption temperature, improve catalytic reforming effect, and strong practicability

Active Publication Date: 2020-11-27
安徽纳蓝环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, zeolite molecular sieve catalysts are used to realize the functions of low-temperature adsorption and high-temperature desorption, but the desorption temperature of the zeolite molecular sieve catalysts in the prior art to hydrocarbon (CH) pollutants is low (less than 180 ° C), and There is no catalytic effect below 450°C, and it needs to rely on the subsequent DOC and TWC catalysts to complete the conversion of hydrocarbons (CH), so it cannot meet the requirements for reducing carbon and hydrogen (CH) emissions of motor vehicles

Method used

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  • A kind of preparation method of zeolite hydrocarbon adsorption reforming catalyst
  • A kind of preparation method of zeolite hydrocarbon adsorption reforming catalyst
  • A kind of preparation method of zeolite hydrocarbon adsorption reforming catalyst

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Embodiment 1

[0023] The preparation method of a kind of zeolite hydrocarbon adsorption reforming catalyst that the present invention proposes comprises the following steps:

[0024] The molecular sieve is mixed with the metal salt solution, stirred and reacted, filtered, washed and dried to obtain the zeolite hydrocarbon adsorption reforming catalyst.

Embodiment 2

[0026] The preparation method of a kind of zeolite hydrocarbon adsorption reforming catalyst that the present invention proposes comprises the following steps:

[0027] Mix the zeolite molecular sieve with the metal salt solution with a concentration of 0.6mol / L at a weight ratio of 1:15, stir for 26 hours, filter, wash, and dry at 105°C for 11 hours to obtain a zeolite with a molar ratio of silicon to aluminum of 3. whole catalyst.

Embodiment 3

[0029] The preparation method of a kind of zeolite hydrocarbon adsorption reforming catalyst that the present invention proposes comprises the following steps:

[0030] Mix the zeolite molecular sieve with a silicon-aluminum molar ratio of 4 and the metal salt solution with a concentration of 1.5mol / L at a weight ratio of 1:7, stir and react for 22 hours, filter, wash, and dry at 95°C for 13 hours to obtain zeolite carbon-hydrogen adsorption reforming catalyst.

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Abstract

The invention discloses a method for preparing a zeolite hydrocarbon-adsorption reforming catalyst. The method comprises the following steps: mixing molecular sieves with a metal salt solution, carrying out a reaction with stirring, carrying out filtering, carrying out washing, and carrying out drying, thereby obtaining the zeolite hydrocarbon-adsorption reforming catalyst. According to the method for preparing the zeolite hydrocarbon-adsorption reforming catalyst, provided by the invention, the obtained zeolite hydrocarbon-adsorption reforming catalyst has relatively low adsorption temperatures and catalysis temperatures and relatively high desorption temperatures to hydrocarbon pollutants and has a good catalytic conversion effect on the hydrocarbon pollutants, the dependency on DOC and TWC catalysts is greatly lowered, and thus, motor vehicles can meet hydrocarbon pollutant emission requirements.

Description

technical field [0001] The invention relates to the technical field of catalysts, in particular to a preparation method of a zeolite hydrocarbon adsorption reforming catalyst. Background technique [0002] Hydrocarbon (CH) pollutant emissions during cold start of motor vehicles account for more than 80% of the total emissions. In order to reduce the emission of hydrocarbon pollutants, it is necessary to perform low-temperature (lower than 150°C) adsorption of hydrocarbon (CH) pollutants during cold start, and desorb hydrocarbon (CH) pollutants after the temperature rises to 200°C. Through the subsequent catalyst (DOC or TWC) to realize carbon hydrogen (CH) to CO 2 catalytic conversion. In the prior art, zeolite molecular sieve catalysts are used to realize the functions of low-temperature adsorption and high-temperature desorption, but the desorption temperature of the zeolite molecular sieve catalysts in the prior art to hydrocarbon (CH) pollutants is low (less than 180 °...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/76B01J29/072B01J20/18B01D53/94C01B3/58C01B39/02B01J20/30
CPCB01D53/94B01D2257/702B01J20/06B01J20/186B01J29/072B01J29/7638B01J29/7676B01J2220/42C01B3/58C01B39/02C01B2203/0435C01B2203/048Y02T10/12
Inventor 李超范炜田炜
Owner 安徽纳蓝环保科技有限公司
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