Microwave-assisted method for preparing biomass-based motor gasoline by rapidly pyrolyzing straws and waste nigre under co-catalysis of double bed layers

A microwave-assisted and co-catalyzed technology is applied in the preparation of liquid hydrocarbon mixtures, the petroleum industry, and the treatment of hydrocarbon oils. It can solve problems such as poor thermal stability, high acidity, and strong corrosion, and reduce secondary pyrolysis reactions. Effects of improving yield and quality and shortening carbonization time

Inactive Publication Date: 2018-03-30
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 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 A method for preparing biomass-based m

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, heat up to 550°C with fixed power, quickly add 100g of straw and waste soapstock mixture (according to the mass ratio of straw: waste soapstock = 1:1) from the feed port to the quartz two-necked bottle, and continue to maintain 550°C Catalytic 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 to obtain 52g of hydrocarbon-rich bio-oil, which was analyzed by GC-MS The hydrocarbon content reaches 88.9...

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, heat up to 550°C with fixed power, quickly add 100g of straw and waste soapstock mixture (according to the mass ratio of straw: waste soapstock = 1:1.5) from the feed port to the quartz two-necked bottle, and continue to maintain 500°C Catalytic 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 to obtain 52g of hydrocarbon-rich bio-oil, which was analyzed by GC-MS The hydrocarbon content rea...

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, heat up to 500°C with fixed power, quickly add 100g of straw and waste soapstock mixture (according to the mass ratio of straw: waste soapstock = 1:2) from the feed port to the quartz two-necked bottle, and continue to maintain 500°C Catalytic 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 to obtain 50g of hydrocarbon-rich bio-oil. GC-MS analysis shows that hydrocarbon-rich bio-oil The hydrocar...

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Abstract

The invention discloses a microwave-assisted method for preparing biomass-based motor gasoline by rapidly pyrolyzing straws and waste nigre under the co-catalysis of double bed layers. The microwave-assisted method comprises the steps: 1) weighing straws and waste nigre according to the mass ratio of 1:1 to 1:10, and uniformly mixing the straws and the waste nigre; 2) placing a catalyst into a U-shaped quartz tube connected with a pyrolysis steam outlet of a double-neck quartz bottle according to the mass ratio (1:1 to 1:10) of an HZSM-5 molecular sieve based catalyst to a mixture of the straws and the waste nigre, and adding a microwave absorbent into a quartz cup; and 3) embedding the double-neck quartz bottle and the U-shaped quartz tube into the quartz cup, placing the quartz cup intoa microwave pyrolysis instrument, carrying out heating to 450-650 DEG C, rapidly adding the mixture of the straws and the waste nigre into the double-neck quartz bottle, carrying out catalytic reforming on the U-shaped quartz tube by using the catalyst, and carrying out condensation by using a condensation tube to form hydrocarbon-enriched biomass-based motor diesel oil. By using the microwave-assisted method, the carbonization time is greatly shortened, the yield and quality of bio-oil are improved, and the content of hydrocarbons in the bio-oil is remarkably increased.

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 gasoline for vehicles from straw and waste soapstock. 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 limited. 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 productio...

Claims

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Application Information

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IPC IPC(8): C10G1/00
CPCC10G1/00C10G2300/1003C10G2300/1014
Inventor 王允圃刘玉环段邓乐戴磊磊周跃陈诺余桢婷姜林曾子鸿吴秋浩阳秀华张辉斌
Owner NANCHANG UNIV
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