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Biomass coke-based bimetallic catalyst as well as preparation method and application thereof

A bimetallic catalyst, biomass coke technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve problems such as catalyst sintering and deactivation, achieve inhibition The effect of sintering, cracking promotion, and prolonging the active time

Active Publication Date: 2020-10-13
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the microwave field, it is very easy to form a "hot spot effect" of local overheating. Although an excessively high temperature will increase the efficiency of tar cracking, it will also cause sintering deactivation of the catalyst.

Method used

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  • Biomass coke-based bimetallic catalyst as well as preparation method and application thereof
  • Biomass coke-based bimetallic catalyst as well as preparation method and application thereof
  • Biomass coke-based bimetallic catalyst as well as preparation method and application thereof

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preparation example Construction

[0034] The present invention also provides a method for preparing the above-mentioned biomass coke-based bimetallic catalyst, comprising the following steps:

[0035] The metal salts of nickel and cerium were supported on screened biomass char by impregnation method and calcined under nitrogen atmosphere to form nickel-cerium intermetallic compounds.

[0036] As a preference, the biomass coke is obtained from rice husk as raw material, followed by pyrolysis gasification, microwave activation, crushing and screening; specifically, the condition of pyrolysis gasification is air gasification at 600-700°C; After microwave activation, the mass content of volatile matter in biomass coke is less than 7%, and the mass content of fixed carbon is higher than 45%. shape.

[0037] Wherein, the conditions for microwave activation are microwave heating under a nitrogen atmosphere, the microwave power is 500-600W, the heating temperature is 600-800°C, and the heating time is greater than or...

Embodiment 1

[0051] Embodiment 1: Preparation of biomass coke-based bimetallic catalyst

[0052] Preparation of biomass char carrier:

[0053] Directly obtained industrial-grade rice husk gasification residue obtained by air gasification at 700°C with coarse rice husk as raw material. According to the results of industrial analysis and elemental analysis, microwave activation was performed on it. The activation condition was: under nitrogen atmosphere Microwave heating, the microwave power is 600W, the heating temperature is 800°C, and the activation lasts for 1 hour. The mass content of the volatile matter of the obtained biomass char is 6.6%, and the fixed carbon content is 48.01%. Then finely crush the microwave-activated biomass coke so that the particle size is between 40 and 60 meshes, and select the rod-shaped or needle-shaped materials for future use.

[0054] Preparation of biomass coke-based bimetallic catalysts:

[0055] Weigh 15g of the above-mentioned biomass coke as a c...

Embodiment 2

[0056] Embodiment 2: Preparation of biomass coke-based bimetallic catalyst

[0057] Preparation of biomass char carrier:

[0058] The industrial-grade rice husk gasification residue obtained by air gasification of coarse rice husk at 500°C was directly obtained. According to the results of industrial analysis and elemental analysis, microwave activation was performed on it. The activation condition was: under nitrogen atmosphere Microwave heating, the microwave power is 500 W, the heating temperature is 550 ° C, and the activation lasts for 1 hour. The mass content of the volatile matter of the obtained biomass char is 6.9%, and the fixed carbon content is 47.2%. Then the microwave-activated biomass coke is finely crushed so that the particle size is between 40 and 60 meshes, and the rod-shaped or needle-shaped materials are selected for use.

[0059] Preparation of biomass coke-based bimetallic catalysts:

[0060] Take 15g of the above-mentioned biomass coke as a cataly...

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Abstract

The invention relates to a biomass coke-based bimetallic catalyst as well as a preparation method and application thereof. The biomass coke-based bimetallic catalyst takes biomass coke as a carrier and is loaded with a nickel-cerium intermetallic compound; wherein metal salts of nickel and cerium can be loaded on the biomass coke through an impregnation method, and the biomass coke is calcined ina nitrogen atmosphere for preparation. Due to the cerium, the surface properties of the catalyst carrier can be improved, and a NiCe-Ni5Ce nickel-rich intermetallic compound system is formed; therefore, the product can effectively inhibit the sintering of nickel, and prolongs the activity time of the catalyst.

Description

technical field [0001] The invention relates to the field of cleaning and treatment of industrial waste, and more to the technical field of catalytic conversion of biomass gasification tar, in particular to a biomass coke-based bimetallic catalyst and its preparation method and application. Background technique [0002] Biomass resources, as a renewable energy source, have been valued by countries all over the world. Strengthening the utilization of biomass resources has obvious economic and environmental benefits. Biomass gasification technology is an important direction for the development of biomass energy utilization. Gasification technology and subsequent upgrading processes can convert biomass into high-quality gas and liquid fuels, and at the same time produce a certain amount of biomass coke. But the tar produced in the gasification process has serious harm to gasification equipment and gas utilization equipment. Therefore, the research on the efficient and stable ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C01B3/22C01B3/26C10C1/20C10L3/00
CPCB01J23/83C10C1/20C10L3/00C01B3/26C01B3/22C01B2203/0277C01B2203/1235C01B2203/1211C01B2203/1041C01B2203/1058
Inventor 陈冠益李健颜蓓蓓程占军马文超
Owner TIANJIN UNIV
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