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Method for preparing hydrocarbon-rich bio-oil and biochar through microwave-assisted double bed co-catalytic rapid pyrolysis of soybean soap stock

A microwave-assisted and co-catalyzed technology, applied in the treatment of hydrocarbon oil, biofuel, and preparation of liquid hydrocarbon mixtures, etc., can solve the problems of degradation of bio-oil quality, low value of bio-char, and reduction of bio-oil yield, etc. efficiency and quality, shorten the carbonization time, and reduce the effect of secondary pyrolysis reactions

Inactive Publication Date: 2018-04-13
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex composition and high oxygen content in soapstock, there are more than one hundred kinds of compounds in the product oil, and there are a large number of oxygen-containing compounds, which makes the utilization of bio-oil difficult.
At the same time, the biochar obtained by pyrolysis has a small specific surface area and poor ads

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0018] Example 1.

[0019] Put 6kg silicon carbide into the quartz cup, 50g HZSM-5 molecular sieve catalyst (diameter 5mm, Si / Al=50, specific surface area 640m 2 / g) Put it in the U-shaped quartz tube connected to the quartz double-necked bottle, bury the quartz double-necked bottle and the U-shaped quartz tube connected with the catalyst in the quartz cup equipped with microwave absorber, and place it in the microwave In the pyrolysis instrument, the fixed power is increased to 550°C, 100g soapstock and 50g bentonite mixture are quickly added from the feed port to the quartz two-neck flask, and the catalytic pyrolysis is maintained at 550°C until the reaction is complete. The pyrolysis steam generated is pumped Under the action of the air pump, the U-shaped quartz tube catalyst is used for catalytic reforming, and finally 47g of hydrocarbon-rich bio-oil and 31g of biochar (soil amendment) are obtained through condensation in the condenser. GC-MS analysis shows that the hydrocarbo...

Example Embodiment

[0020] Example 2.

[0021] Put 6kg silicon carbide into the quartz cup, 60g HZSM-5 molecular sieve catalyst (diameter 5mm, Si / Al=50, specific surface area 640m 2 / g) Put it in the U-shaped quartz tube connected to the quartz double-necked bottle, bury the quartz double-necked bottle and the U-shaped quartz tube connected with the catalyst in the quartz cup equipped with microwave absorber, and place it in the microwave In the pyrolysis instrument, the fixed power is increased to 500°C, and 100g soapstock and 20g bentonite mixture are quickly added from the feed port to the quartz two-neck flask, and the catalytic pyrolysis is maintained at 500°C until the reaction is complete. The pyrolysis steam generated is pumped Under the action of the air pump, the U-shaped quartz tube catalyst is used for catalytic reforming, and finally 53g of hydrocarbon-rich bio-oil and 28g of biochar (soil amendment) are obtained through condensation in the condenser. GC-MS analysis shows that the hydroc...

Example Embodiment

[0022] Example 3.

[0023] Put 6kg silicon carbide into the quartz cup, 25g HZSM-5 molecular sieve catalyst (diameter 5mm, Si / Al=50, specific surface area 640m 2 / g) Put it in the U-shaped quartz tube connected to the quartz double-necked bottle, bury the quartz double-necked bottle and the U-shaped quartz tube connected with the catalyst in the quartz cup equipped with microwave absorber, and place it in the microwave In the pyrolysis instrument, the fixed power is increased to 600°C, and 100g soapstock and 100g bentonite mixture are quickly added from the feed port to the quartz two-neck flask, and the catalytic pyrolysis is maintained at 600°C until the reaction is complete. The pyrolysis steam generated is pumped Under the action of the air pump, the U-shaped quartz tube catalyst is used for catalytic reforming, and finally 44.6g of hydrocarbon-rich bio-oil and 32.7g of biochar (soil amendment) are obtained through condensation in the condenser. The hydrocarbons in the hydroca...

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PUM

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Abstract

A method for preparing hydrocarbon-rich bio-oil and biochar through microwave-assisted double bed co-catalytic rapid pyrolysis of soybean soap stock comprises the following steps: 1, uniformly mixinga bentonite catalyst with the soybean soap stock according to a mass ratio of 1:1 to 1:5; 2, taking an HZSM-5 molecular sieve catalyst according to a mass ratio of the HZSM-5 molecular sieve to the soybean soap stock of 1:2 to 1:5, adding the HZSM-5 molecular sieve into a U-shaped quartz tube connected with the pyrolysis steam outlet of a double-mouth quartz bottle, and adding a microwave absorbent into a quartz cup; and 3, embedding the double-mouth quartz bottle and the U-shaped quartz tube in the quartz cup filled with the microwave absorbent, placing the obtained quartz cup in a microwavepyrolysis instrument, heating the instrument to 450-650 DEG C, rapidly adding the above obtained bentonite catalyst and soybean soap stock mixture, and allowing pyrolysis steam to go through a suctionpump and go through the U-shaped quartz tube for catalytic reforming by the catalyst, condensing the obtained steam by a condenser tube to obtain hydrocarbon-rich bio-oil and a solid which is biochar. The method greatly shortens the carbonization time, improves the yield and the quality of the bio-oil, and significantly improves the content of alkanes and aromatic hydrocarbons in the hydrocarbon-rich bio-oil and the heavy metal adsorption performance of the biochar.

Description

technical field [0001] The invention belongs to the technical field of biomass energy conversion, and relates to a method for preparing hydrocarbon-rich bio-oil and bio-char from soybean soapstock. Background technique [0002] With the increasing consumption of fossil fuels and the deterioration of the environment, the development of renewable clean energy has become the focus of researchers. Biomass has the advantages of rich content, clean and renewable, and carbon neutral, and is the best raw material for the production of renewable and clean energy. my country's oil processing plants produce a large amount of soapstock by-products every year. If they are not used for value-added utilization, they will easily cause environmental pollution and waste of resources. At present, some soapstocks are used to prepare biodiesel, but due to the defects of low cetane number, high viscosity and low calorific value, it is difficult to produce on a large scale. Therefore, how to uti...

Claims

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Application Information

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IPC IPC(8): C10G1/00C10B53/02
CPCC10B53/02C10G1/00C10G2300/1014Y02E50/10
Inventor 王允圃刘玉环吴秋浩曾子鸿戴磊磊陈诺段邓乐周跃余桢婷姜林阳秀华张辉斌
Owner NANCHANG UNIV
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