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A method for synchronously reducing the content of high-ring, middle-ring and low-ring pahs in biomass pyrolysis oil

A biomass pyrolysis technology for oil and biomass, applied in the field of biomass energy, can solve problems such as the inability to control the content of PAHs, achieve the effect of inhibiting the formation of PAHs and reducing environmental health risks

Active Publication Date: 2021-01-26
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 deficiency in the prior art that the content of PAHs with different toxicity in the pyrolysis oil cannot be controlled while ensuring the effective transformation of biomass, and to provide a kind of synchronous reduction of biomass pyrolysis oil Method for middle-high ring, middle ring and low ring PAHs content

Method used

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  • A method for synchronously reducing the content of high-ring, middle-ring and low-ring pahs in biomass pyrolysis oil
  • A method for synchronously reducing the content of high-ring, middle-ring and low-ring pahs in biomass pyrolysis oil
  • A method for synchronously reducing the content of high-ring, middle-ring and low-ring pahs in biomass pyrolysis oil

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Embodiment 1

[0036] 1. Pyrolysis of biomass

[0037] The schematic diagram of the biomass pyrolysis test flow device is as follows: figure 1 As shown, the specific process is as follows:

[0038](1) Put wood chips or a mixture of Fe / HZSM-5 and wood chips in a mass ratio of 1:1 into the porcelain boat;

[0039] (2) The tube furnace is fed with N 2 gas or N 2 with CO 2 Mix the gas for about 20 minutes, remove the air in the furnace, and raise the temperature to 500°C;

[0040] (3) Place the porcelain boat filled with materials in step (1) in a tube furnace, pyrolyze for 5 minutes, then collect the pyrolysis oil through the condensation system, and weigh it.

[0041] According to the above-mentioned process, set 4 treatment groups, the Fe / HZSM-5 that each treatment group adopts and the kind of gas that pass into are shown in Table 1, wherein also have 2 control groups, in the control group except the gas that pass into is different Except, other conditions were the same as the treatment...

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Abstract

The invention discloses a method for synchronously reducing the content of high-ring, middle-ring and low-ring PAHs in biomass pyrolysis oil. The method is based on N 2 with CO 2 The mixed gas is used as the pyrolysis atmosphere to pyrolyze the biomass or the mixture of biomass and zeolite molecular sieve at a mass ratio of 0.5 to 2:1 under the condition of 450-550°C, which can simultaneously reduce the high and medium rings of biomass pyrolysis oil. , Low ring PAHs content. The present invention passes a certain amount of CO 2 The gas is introduced into the pyrolysis atmosphere, that is, using N 2 with CO 2 The mixed gas is used as the pyrolysis atmosphere to pyrolyze the biomass or the mixture of biomass and zeolite molecular sieves, which has achieved the effect of inhibiting the generation of PAHs during the pyrolysis process of biomass, thereby significantly reducing the high and medium rings of biomass pyrolysis oil. , Low content of ring PAHs, reducing environmental health risks in subsequent applications such as pyrolysis oil storage and transportation.

Description

technical field [0001] The invention belongs to the technical field of biomass energy, and more specifically relates to a method for synchronously reducing the content of high-ring, middle-ring and low-ring PAHs in biomass pyrolysis oil. Background technique [0002] The non-renewability of coal, petroleum and other fossil energy seriously restricts the rapid, healthy and sustainable development of my country's economy. Biomass is a cheap and easy-to-obtain renewable energy, which has the potential to replace fossil fuels. Therefore, countries all over the world have paid great attention to the development and utilization of biomass. Biomass is an organism formed directly or indirectly through photosynthesis, generally composed of cellulose, hemicellulose, lignin and other components. Biomass pyrolysis, that is, the thermal degradation of biomass in the absence of oxygen or oxygen, often using inert gas N 2 As a reaction atmosphere, the products are coke, synthesis gas and...

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Application Information

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