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Method for preparing gas, liquid and carbon products by biomass pyrolysis

A technology of biomass pyrolysis and biomass charcoal, applied in the direction of biofuel, indirect heating carbonization, special form of carbonization, etc., to achieve the effect of improving selectivity, improving availability, increasing yield and selectivity

Active Publication Date: 2019-05-17
GUANGXI FORESTRY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to overcome the problems of economy and environmental protection encountered in traditional furfural production, the present invention provides a method for preparing biomass chemicals and biomass charcoal by pyrolysis

Method used

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  • Method for preparing gas, liquid and carbon products by biomass pyrolysis

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Embodiment 1

[0038] A method for preparing gas, liquid, and charcoal products by pyrolysis of biomass, characterized in that: after mixing biomass raw materials with water, under normal pressure, insulated from air, and programmed temperature cracking to obtain gas, acetic acid, furfural, and biomass charcoal , including the following steps:

[0039] (1) Impurity removal and crushing: remove impurities such as soil and stones mixed into the raw materials of chestnut bracts, and crush them into 2-60 mesh particles;

[0040] (2) Stirring and mixing: add a certain amount of water to the pulverized raw materials, and stir evenly to make the moisture content of the raw materials reach 25%;

[0041] (3) Loading and deoxygenation: put the above-mentioned water-containing biomass raw materials into the cracking furnace, and pass inert gas or vacuum to remove the air in the cracking device before cracking;

[0042] (4) Heating cracking: use external heating, gradually increase the temperature for ...

Embodiment 2

[0047] A method for preparing gas, liquid, and charcoal products by pyrolysis of biomass, characterized in that: after mixing chestnut bract raw materials with water, under normal pressure, air is isolated, and the temperature is programmed to be cracked to obtain gas, acetic acid, furfural, and biomass charcoal , including the following steps:

[0048] (1) Impurity removal and crushing: remove impurities such as soil and stones mixed into the raw materials of chestnut bracts, and crush them into 2-60 mesh particles;

[0049] (2) Stirring and mixing: add a certain amount of water to the crushed raw materials, and stir evenly to make the moisture content of the raw materials reach 33%;

[0050] (3) Loading and deoxygenation: put the above-mentioned water-containing biomass raw materials into the cracking furnace, and pass inert gas or vacuum to remove the air in the cracking device before cracking;

[0051] (4) Heating cracking: use external heating, gradually increase the tem...

Embodiment 3

[0056] A method for preparing gas, liquid, and charcoal products by pyrolysis of biomass, characterized in that: after mixing camellia oleifera shell raw material with water, under normal pressure, air is isolated, and the temperature is programmed to be cracked to obtain gas, acetic acid, furfural, and biomass charcoal , including the following steps:

[0057] (1) Impurity removal and crushing: remove impurities such as soil and stones mixed into the camellia oleifera shell raw material, and crush it into 2-60 mesh particles;

[0058] (2) Stirring and mixing: add phosphoric acid aqueous solution with a concentration of 0.5 times the mass of dry raw materials and 10% concentration, add it to the crushed raw materials, and stir evenly;

[0059] (3) Loading and deoxygenation: put the above-mentioned water-containing biomass raw materials into the cracking furnace, and pass inert gas or vacuum to remove the air in the cracking device before cracking;

[0060] (4) Heating and pyr...

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Abstract

The invention discloses a method for preparing gas, liquid and carbon products by biomass pyrolysis. The method comprises the steps that firstly biomass raw materials such as residues of branches andleaves after extracting essential oil from wood chips, bamboo chips, chestnut shells, oil tea shells and natural spices are mixed with water, the moisture content of the raw materials is controlled tobe 25-80%, and then the raw materials are charged into a cracking furnace; inert gas is introduced before cracking to pump out air in the system; temperature programming and cracking are performed, and the temperature is maintained at 150 DEG C, 200 DEG C, 300 DEG C and 400 DEG C in the temperature rising period, and the final temperature is 500 DEG C; liquid obtained by cracking is mainly an aqueous solution of acetic acid, furan and phenol derivative organic compounds, uncondensed combustible gas is mainly H2, CO, methane, ethane, propane, and solid is biomass charcoal; and acid, such as phosphoric acid, sulfuric acid and hydrochloric acid, of 0.1-20% of the mass of the biomass raw materials is added, and the selectivity of furfural can be increased.

Description

technical field [0001] The invention relates to the technical field of biomass energy and chemical processing, in particular to a method for preparing gas, liquid and charcoal products by pyrolyzing biomass. Background technique [0002] Petroleum, coal, etc. are the most important energy sources for human beings, and they also provide a large number of chemicals, but the earth's reserves are limited. With the large-scale exploitation and use of human beings, the resources are increasingly depleted. Biomass resources are renewable, and making full use of biomass resources is beneficial to the sustainable development of human beings. Furfural is a very important platform compound, and environmental protection and cheap production are the prerequisites for its large-scale application. [0003] Furfural is formed by hydrolysis of pentosan under the action of acid to generate pentose, and then dehydration and cyclization of pentose. The main raw materials for production are ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/02C10B57/00C10B47/44C10B47/34
CPCY02E50/10
Inventor 孟中磊蒋剑春孙康许玉孙云娟杨漓周丽珠
Owner GUANGXI FORESTRY RES INST
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