Method for preparation of bio-oil by microwave thermal cracking of biomass

A biomass and bio-oil technology, which is used in the preparation of liquid hydrocarbon mixtures, the petroleum industry, and the treatment of hydrocarbon oil, can solve the problems of low bio-oil yield, harsh process conditions, and high production costs, and reduce pollutant emissions. , High degree of cracking, the effect of preventing secondary cracking

Inactive Publication Date: 2019-10-15
CHAOHU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing biomass pyrolysis technology generally has the disadvantages of low conversion rate, low bio-oil yield, harsh process conditions, complex equipment, and high production costs.

Method used

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Comparison scheme
Effect test

Embodiment 1

[0023] A method for preparing bio-oil by microwave pyrolysis of biomass, the method comprises the following steps:

[0024] (1). Pretreatment of straw biomass materials:

[0025] 1). Cut 500 grams of rice straw into small pieces of 4cm to 6cm, clean the impurities and dirt, and dry in the air.

[0026] 2). Crushing small pieces of straw into powder particles;

[0027] 3). The rice straw powder particles are ball-milled, and the ball-milled rice straw material is passed through a 140-mesh sieve or a 170-mesh sieve; the sieved straw material is dried at 60-70° C. in a drying oven to obtain a pretreated rice straw powder;

[0028] 4). Dissolve a certain amount of ionic liquid in distilled water, add pretreated rice straw powder into the solution, stir evenly, then add catalyst, soak for 3 hours, and dry the soaked rice straw powder Carry out 60~70 ℃ drying in box to constant weight, get rice straw impregnation powder;

[0029] (2). Preparation of bio-oil:

[0030] 1). The nit...

Embodiment 2

[0035] A method for preparing bio-oil by microwave pyrolysis of biomass, the method comprises the following steps:

[0036] (1). Bamboo slice biomass material pretreatment:

[0037] 1). Cut 700 grams of waste moso bamboo slices into 4cm-6cm sections, clean the impurities and dirt, and dry them in the air.

[0038] 2). Crushing waste bamboo chips into powder particles;

[0039] 3). Ball mill the powder of moso bamboo flakes, pass the milled peanut shell material through a 140-mesh sieve or a 170-mesh sieve; dry the sieved moso bamboo flakes material at 60-70°C in a drying oven to obtain pretreated moso bamboo flake powder;

[0040] 4). Dissolve a certain amount of ionic liquid in distilled water, add the pretreated moso bamboo flakes powder into the solution, stir evenly, then add catalyst, soak for 3 hours, and soak the impregnated moso bamboo flakes powder Carry out 60~70 ℃ drying in drying oven to constant weight, obtain Moso bamboo slice impregnation powder;

[0041] (2...

Embodiment 3

[0047] A method for preparing bio-oil by microwave pyrolysis of biomass, the method comprises the following steps:

[0048] (1). Pretreatment of pine sawdust biomass material:

[0049] 1). Cut 600 grams of pine sawdust into small pieces of 4cm to 6cm, clean the impurities and dirt, and dry in the air.

[0050] 2). Crushing small pieces of pine sawdust into powder particles;

[0051]3). The pine sawdust powder particles are ball milled, and the pine sawdust material after ball milling is passed through a 140-mesh sieve or a 170-mesh sieve; the sieved pine sawdust material is dried at 60-70°C in a drying oven to obtain pretreated pine wood crumb powder;

[0052] 4). Dissolve a certain amount of ionic liquid in distilled water, add pretreated pine sawdust powder into the solution, stir evenly, then add catalyst, soak for 3 hours, and soak the impregnated pine sawdust powder Drying at 60-70°C in a drying oven to constant weight to obtain pine sawdust impregnation powder;

[00...

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Abstract

The invention discloses a method for preparation of bio-oil by microwave thermal cracking of biomass. Specifically, biomass powder subjected to miniaturization pretreatment and moisture removal pretreatment is impregnated, ionic liquid is evenly attached to the surface of the biomass powder, heat energy can quickly be transferred to the wrapped biomass powder, so that the temperature inside the biomass powder can rise quickly, cracking reaction is carried out under the action of a catalyst, a spray tower cools a filtered volatile rapidly to prevent secondary cracking of the volatile, thus increasing the production of bio-oil. The method can realize the resource utilization of biomass and reduce pollutant discharge, and has the advantages of simple, safe and economical process operation.

Description

technical field [0001] The invention relates to the technical field of preparing bio-oil from biomass, in particular to a method for preparing bio-oil by microwave pyrolysis of biomass. Background technique [0002] Biomass energy is the energy provided by living plants in nature. These plants use biomass as a medium to store solar energy. Biomass energy is extremely abundant on the earth, and it is a renewable energy source, and it is also the only renewable carbon source. Its unique advantages make the research and development of biomass energy attract widespread attention and become an energy source. Hot topics in the field. Converting renewable biomass resources into clean bio-oil through pyrolysis conversion technology to partially replace petroleum fuels can not only free us from excessive dependence on limited petroleum resources, but also greatly reduce emissions of pollutants and greenhouse gases , Improve the environment and protect the ecology. Bio-oil is a mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00
CPCC10G1/00C10G2300/1011C10G2300/70
Inventor 王新运李川吴凤义
Owner CHAOHU UNIV
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