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Method for preparing biomass based automotive diesel oil by quickly co-pyrolyzing bamboo waste and waste tires through microwave-assisted double-bed catalysis

A waste tire and microwave-assisted technology, which is applied in the preparation of biofuels, liquid hydrocarbon mixtures, and the petroleum industry, can solve problems such as poor thermal stability, high acidity, and strong corrosion, and reduce secondary pyrolysis reactions. Yield and quality, effect of shortening carbonization time

Inactive Publication Date: 2018-02-02
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiencies of high oxygen content, low calorific value, poor thermal stability, high viscosity, high acidity and strong corrosiveness of the bio-oil obtained by the existing biomass pyrolysis technology, and to provide a microwave-assisted double-bed Layer-catalyzed rapid co-pyrolysis of bamboo waste and waste tires to prepare biomass-based vehicle diesel. The method is simple in process, fast in pyrolysis, and the obtained pyrolysis bio-oil has low oxygen content, high hydrocarbon content, and strong stability. High calorific value, similar properties to 0# diesel, can be directly mixed with vehicle diesel in proportion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Put 8kg silicon carbide into the quartz cup, 20g HZSM-5 molecular sieve catalyst (diameter 5mm, Si / Al=50, specific surface area 640m 2 / g) is placed in a U-shaped quartz tube connected to a quartz two-necked bottle, and the quartz two-necked bottle and the U-shaped quartz tube connected to it with a catalyst are embedded in a quartz cup equipped with a microwave absorber, placed in a microwave In the pyrolysis instrument, the fixed power is raised to 550°C, and 100g of bamboo waste and waste tire mixture (according to the mass ratio of bamboo waste: waste tire = 1:1) is quickly added to the quartz two-necked bottle from the feed port, and the catalysis is continued at 550°C. Pyrolysis until the reaction is complete, the generated pyrolysis steam is catalyzed and reformed by a U-shaped quartz tube catalyst under the action of an air pump, and finally condensed through a condenser tube to obtain 55g of hydrocarbon-rich bio-oil. GC-MS analysis shows that the hydrocarbon-ric...

Embodiment 2

[0022] Put 8kg of silicon carbide into the quartz cup, 10g of HZSM-5 molecular sieve catalyst (diameter 5mm, Si / Al=50, specific surface area 640m 2 / g) is placed in a U-shaped quartz tube connected to a quartz two-necked bottle, and the quartz two-necked bottle and the U-shaped quartz tube connected to it with a catalyst are embedded in a quartz cup equipped with a microwave absorber, placed in a microwave In the pyrolysis instrument, the fixed power is raised to 500°C, and 100g of bamboo waste and waste tire mixture (according to the mass ratio of bamboo waste: waste tire = 1:1.5) is quickly added to the quartz two-necked bottle from the feed port, and the catalysis is continued at 500°C. Pyrolysis until the reaction is complete, the generated pyrolysis steam is catalytically reformed by a U-shaped quartz tube catalyst under the action of an air pump, and finally condensed through a condenser tube to obtain 52g of hydrocarbon-rich bio-oil. GC-MS analysis shows that in the hydr...

Embodiment 3

[0024] Put 8kg silicon carbide into the quartz cup, 20g HZSM-5 molecular sieve catalyst (diameter 5mm, Si / Al=50, specific surface area 640m 2 / g) is placed in a U-shaped quartz tube connected to a quartz two-necked bottle, and the quartz two-necked bottle and the U-shaped quartz tube connected to it with a catalyst are embedded in a quartz cup equipped with a microwave absorber, placed in a microwave In the pyrolysis instrument, the fixed power is raised to 550°C, and 100g of bamboo waste and waste tire mixture (according to the mass ratio of bamboo waste: waste tire = 1:2) is quickly added to the quartz two-necked bottle from the feed port, and the catalysis is continued at 550°C. Pyrolysis until the reaction is complete, the generated pyrolysis steam is catalyzed and reformed by a U-shaped quartz tube catalyst under the action of an air pump, and finally condensed through a condenser tube to obtain 50g of hydrocarbon-rich bio-oil. GC-MS analysis shows that the hydrocarbon-ric...

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Abstract

The invention provides a method for preparing biomass based automotive diesel oil by quickly co-pyrolyzing bamboo waste and waste tires through microwave-assisted double-bed catalysis. The method comprises the steps: 1) according to a mass ratio of (1 to 1) to (1 to 10), weighing bamboo waste and waste tires and evenly mixing; 2) according to a mass ratio of HZSM-5 molecular sieve catalyst to a bamboo waste and waste tire mixture equal to (1 to 1) to (1 to 10), putting the catalyst into a U-shaped quartz tube connected with a pyrolysis steam outlet of a quartz double-neck bottom and adding a microwave absorbent into a quartz cup; 3) burying the quartz double-neck bottom and the U-shaped quartz pipe into the quartz cup, putting into a microwave pyrolyzing instrument, heating to 450 to 650 DEG C, quickly adding the bamboo waste and waste tire mixture into the quartz double-neck bottle, catalyzing and reforming generated pyrolysis steam by the catalyst in the U-shaped quartz tube and condensing into hydrocarbon-rich biomass based automotive diesel oil by a condensation pipe. The method disclosed by the invention greatly shortens carbonizing time, improves bio-oil yield and quality andremarkably improves contents of alkane and arene in hydrocarbon-rich bio-oil.

Description

technical field [0001] The invention belongs to the technical field of biomass energy conversion, and mainly relates to a method for preparing biomass-based vehicle diesel from bamboo waste and waste tires. Background technique [0002] With the rapid consumption of fossil fuels and the deterioration of the environment, the rapid pyrolysis of biomass to produce renewable fuels has attracted more and more attention from researchers. However, the bio-oil obtained by this technology has high oxygen content, low calorific value, poor thermal stability, high viscosity, high acidity, and strong corrosion, so its further application has been greatly restricted. It is worth noting that these disadvantages are closely related to the high oxygen content in bio-oil. In order to improve the quality of bio-oil, microwave rapid catalytic pyrolysis of biomass to prepare hydrocarbon-rich bio-oil technology came into being. By combining rapid pyrolysis and catalytic reforming oil production...

Claims

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Application Information

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IPC IPC(8): C10G1/00C10G1/10C10G32/04
CPCC10G1/002C10G1/10C10G32/04C10G2300/1014C10G2300/70C10G2300/80C10G2400/04Y02E50/10
Inventor 王允圃刘玉环陈诺余桢婷姜林曾子鸿吴秋浩戴磊磊段邓乐周跃张志林张淑梅
Owner NANCHANG UNIV
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