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Hierarchical pore molecular sieve N-Meso-ZSM-5 catalyst, and method for preparing bio-oil through catalytic pyrolysis of lignin by catalyst

A molecular sieve, multi-level pore technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of long residence time, difficult reaction conditions, difficult catalyst recovery, etc., to reduce equipment investment. , the effect of alleviating energy and environmental problems, low cost

Inactive Publication Date: 2018-09-07
HUIZHOU RES INST OF SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Among them, the in-situ catalytic pyrolysis reaction is that the biomass and the catalyst are evenly mixed and filled into the reactor (such as high temperature and high pressure hydrothermal liquefaction). time, but it is precisely because of this that the reaction needs to be carried out under high pressure and the residence time is long. Because the reaction conditions of this method are not easy to control, the catalyst is not easy to recover, that is, the application process is subject to certain restrictions

Method used

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  • Hierarchical pore molecular sieve N-Meso-ZSM-5 catalyst, and method for preparing bio-oil through catalytic pyrolysis of lignin by catalyst
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  • Hierarchical pore molecular sieve N-Meso-ZSM-5 catalyst, and method for preparing bio-oil through catalytic pyrolysis of lignin by catalyst

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Experimental program
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Effect test

Embodiment 1

[0036] Weigh 10g lignin sample and 1g catalyst into the reactor according to the material-liquid ratio of 10:1. The addition amount of the catalyst is 10% of the lignin. The multi-stage porous catalyst is selected as Ga-Meso-ZSM-5 for pyrolysis. The temperature is 500°C; the catalytic temperature is 600°C; the pressure is normal pressure; the reaction time is 4h, and the liquid yield is 7.00%. The relative content of total phenolic compounds such as phenol, guaiacol, hydroquinone and catechol in the catalytic conversion products is 96.15%.

Embodiment 2

[0038] Weigh 10g lignin sample and 1g catalyst according to the material-liquid ratio of 10:1 and add them to the reactor. The addition amount of the catalyst is 10% of the lignin. The multi-stage porous catalyst is Co-Meso-ZSM-5, and the pyrolysis The temperature is 500°C; the catalytic temperature is 600°C; the pressure is normal pressure; the reaction time is 4h, and the liquid yield is 8.70%. The relative content of total phenolic compounds such as phenol, guaiacol, hydroquinone, and catechol in the catalytic conversion product is 96.26%.

Embodiment 3

[0040] Weigh 10g lignin sample and 1g catalyst according to the material-to-liquid ratio of 10:1 and add them to the reactor. The addition amount of the catalyst is 10% of the lignin. The multi-stage porous catalyst is Ce-Meso-ZSM-5, which is used for pyrolysis. The temperature is 500°C; the catalytic temperature is 600°C; the pressure is normal pressure; the reaction time is 4h, and the liquid yield is 10.39%. The relative content of total phenolic compounds such as phenol, guaiacol, hydroquinone, and catechol in the catalytic conversion products is 97.65%.

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Abstract

The invention discloses a hierarchical pore molecular sieve N-Meso-ZSM-5 catalyst, and a method for preparing bio-oil through catalytic pyrolysis of lignin by the catalyst. The metal modified hierarchical pore molecular sieve N-Meso-ZSM-5 catalyst is obtained through modifying an H-type hierarchical pore molecular sieve N-Meso-ZSM-5 catalyst with metal, and the metal can be one or more of Ga, Ce,Ni, Fe, Zn and Co. The catalyst disclosed in the invention is obtained through isopyknic impregnation process modification of the one or more transition metals. The non-in situ analysis method for thecatalytic pyrolysis of lignin by the modified catalyst comprises the following steps: introducing the modified hierarchical pore molecular sieve catalyst into a fixed bed reactor, performing ectopiccatalytic pyrolysis on the lignin to prepare a functional chemical substance, and performing catalytic conversion separation and purification to obtain a liqid product mainly comprising phenol, guaiacol, hydroquinone and catechol.

Description

Technical field [0001] The invention relates to the field of renewable biomass energy, in particular to a metal-modified multi-stage porous molecular sieve N-Meso-ZSM-5 catalyst and a method for preparing bio-oil by catalyzing and pyrolyzing lignin Background technique [0002] With the continuous progress of society, the level of productivity continues to rise, and the demand for energy continues to increase. Due to excessive consumption, fossil resources represented by oil and coal are frequently drying up. At the same time, the increasingly serious environmental pollution caused by the use of fossil resources is also a serious threat to the human environment. Under the dual pressure of energy and environment, the development of alternative renewable energy has become the only way to solve energy and environmental problems today. Among the many renewable energy sources, biomass is the only resource form that can be converted into liquid fuel, and it is expected to become a su...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/46C10B53/02C10G1/00
CPCB01J29/405B01J29/46C10B53/02C10G1/00C10G2300/1014Y02E50/10
Inventor 纪红兵周建玲陈宇方丽娜
Owner HUIZHOU RES INST OF SUN YAT SEN UNIV
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