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A method for in-situ reduction of pahs content in bio-oil prepared by catalytic pyrolysis of biomass

A technology of catalytic pyrolysis and biomass, which is applied in the field of bio-oil produced by in-situ reduction of biomass catalytic pyrolysis, can solve the problems that the high content of single-ring aromatic hydrocarbons and low content of PAHs can not be guaranteed at the same time, so as to reduce environmental health risks and high quality, effect of content reduction

Active Publication Date: 2020-12-08
GUANGDONG UNIV OF TECH
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the defects and deficiencies in the prior art that the high content of single-ring aromatics and the low content of PAHs in the bio-oil prepared from biomass through pyrolysis can not be guaranteed at the same time, and provide an in-situ bio-reduction method. Method for PAHs content in bio-oil prepared by material catalytic pyrolysis

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  • A method for in-situ reduction of pahs content in bio-oil prepared by catalytic pyrolysis of biomass
  • A method for in-situ reduction of pahs content in bio-oil prepared by catalytic pyrolysis of biomass
  • A method for in-situ reduction of pahs content in bio-oil prepared by catalytic pyrolysis of biomass

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Embodiment 1

[0034] 1. Catalytic pyrolysis of biomass

[0035] The schematic diagram of the biomass pyrolysis test flow device is as follows: figure 1 As shown, the specific process is as follows:

[0036] (1) Catalyst is mixed with Mandshurica mandshurica wood chips in a mass ratio of 1:1;

[0037] (2) Tube furnace into CO 2 or N 2 Gas for 20 minutes, remove the air in the furnace, and raise the temperature to 500°C;

[0038] (3) The mixture in step (1) was placed in a tube furnace, pyrolyzed for 5 minutes, and then collected by a condensation system to obtain bio-oil, and weighed.

[0039] According to the above process, 4 treatment groups are set, and the catalyst and pyrolysis atmosphere types used in each treatment group are shown in Table 1. There are also 4 control groups. Compared with the corresponding treatment groups, in addition to the pyrolysis Except for the different atmosphere, other conditions were the same as those of the treatment group.

[0040] Table 1 The situat...

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Abstract

The invention discloses a method for the in-situ reduction of a PAHs content in biological oil prepared by the catalytic pyrolysis of biomass. The method comprises the following steps of, in the process of the catalytic pyrolysis of the biomass, replacing a conventional inert gas N2 with a CO2 gas as a pyrolysis atmosphere, mixing a catalyst with the biomass according to a mass ratio of (0.5 to 2)to 1, and then carrying out the pyrolysis in a condition of 450 DEG C to 550 DEG C, so as to obtain high-quality biological oil with a lower content of a PAHs pollutant. By using the method providedby the invention, through simultaneously using the catalyst and the CO2 pyrolysis atmosphere, while the biological oil prepared by the pyrolysis of the biomass is guaranteed to be rich in monocyclic aromatic hydrocarbon high-value component, the content of the PAHs pollutant can be controlled; the content is limited and inhibited at a lower level; and not only is the quality of the biological oilensured, but also the environmental health risk of the biological oil in a subsequent application process is decreased.

Description

technical field [0001] The invention belongs to the technical field of biomass energy, and more specifically relates to a method for reducing PAHs content in bio-oil prepared by catalytic pyrolysis of biomass in situ. Background technique [0002] With the continuous development of the world economy, the shortage of resources and environmental pollution caused by the massive consumption of fossil energy have become increasingly prominent. Biomass, as a cheap and easy-to-obtain renewable resource, is considered as a potential raw material that can replace fossil fuels. The development and utilization of biomass has attracted great attention from all over the world. Low-grade biomass energy can be converted into high-grade energy through thermochemical reactions by using heat treatment methods, mainly including pyrolysis, combustion and gasification technologies. Among them, pyrolysis has attracted widespread attention because it can produce bio-oil, a liquid product that has...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G1/00
CPCC10G1/00C10G2300/1011
Inventor 何峣陈思王铁军陈俊捷宁寻安
Owner GUANGDONG UNIV OF TECH
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