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Method for preparing fuel oil with high alkane content by co-cracking non-edible grease and waste plastic

A technology for edible oils and waste plastics, applied in the preparation of liquid hydrocarbon mixtures, petroleum industry, biological raw materials, etc., can solve problems such as low fuel efficiency, and achieve the effect of preventing backflow to the dining table, improving oil quality, and solving environmental pollution problems.

Active Publication Date: 2015-11-11
浙江加宝新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the deficiencies of the prior art, especially the problem of low efficiency in the preparation of fuel by pyrolysis of waste plastics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Cut 30 grams of discarded low-density polyethylene plastic into an area of ​​4cm 2 Of nearly square fragments.

[0023] (2) Mix the discarded low-density polyethylene plastic fragments from step (1) and the smooth bark tree oil at a mass ratio of 1:1.

[0024] (3) Feed the mixture of step (2) into the pyrolysis reactor, replace the air in the reactor with nitrogen, increase the temperature at a rate of 20°C / min. When the temperature of the reactant reaches 150°C, turn on the stirring device, Continue to heat up, control the pyrolysis reaction temperature at 400°C, and the reaction time is 20 minutes. After the pyrolysis reaction product is separated from gas and solid, the condensable liquid in the gas product obtains 51.3 g of liquid fuel oil. After analysis, the content of alkanes is as high as 74%, and the total insoluble matter in the anti-oxidation stability of the rectified liquid fuel is less than 0.5mg / 100ml (GB252-200 detection method).

Embodiment 2

[0026] (1) Cut 30 grams of discarded high-density polyethylene plastic into an area of ​​3cm 2 Of nearly square fragments.

[0027] (2) Mix the discarded high-density polyethylene plastic fragments in step (1) with the smooth bark tree oil in a mass ratio of 1:1.5.

[0028] (3) Feed the mixture of step (2) into the pyrolysis reactor, replace the air in the reactor with nitrogen, and increase the temperature at a rate of 25°C / min. When the temperature of the reactant reaches 150°C, turn on the stirring device. The pyrolysis reaction temperature was controlled at 450°C, the reaction time was 18 minutes, and the pyrolysis reaction product was separated from gas and solid, and the condensable liquid in the gas product obtained 64 grams of liquid fuel oil. After analysis, the content of alkanes is as high as 76%, and the total insoluble matter in the anti-oxidation stability of the rectified liquid fuel is less than 0.6mg / 100ml (GB252-200 detection method).

Embodiment 3

[0030] (1) Cut 30 grams of discarded polypropylene plastic into an area of ​​2cm 2 Of nearly square fragments.

[0031] (2) Mix the discarded polypropylene plastic fragments in step (1) with the smooth bark tree oil in a mass ratio of 1:2.

[0032] (3) Feed the mixture of step (2) into the pyrolysis reactor, replace the air in the reactor with nitrogen, increase the temperature, and set the heating rate to 30℃ / min. When the temperature of the reactant reaches 150℃, turn on the stirring device The pyrolysis reaction temperature is controlled at 500°C, the reaction time is 17 minutes, and the pyrolysis reaction product is separated from gas and solid. The condensable liquid in the gas product obtains 77 grams of liquid fuel oil. After analysis, the content of alkanes is as high as 75.2%, and the total insoluble matter in the anti-oxidation stability of the rectified liquid fuel is less than 0.56mg / 100ml (GB252-200 detection method).

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Abstract

Provided is a method for preparing fuel oil with high alkane content by co-cracking non-edible grease and waste plastic. The method comprises the steps that 1, the waste plastic is cut and broken into fragments of which the area is smaller than 100 cm<2>; 2, the waste plastic and the non-edible grease are mixed according to the mass ratio of 1:1-1:10; 3, the mixture is fed into a cracking reactor, air in the reactor is replace by nitrogen, heating is conducted, the heating rate is 5-300 DEG C / min, when the temperature of reactant is increased to 150 DEG C, a stirring device is started, heating is conducted continuously, the temperature of the cracking reaction is controlled to range from 350 DEG C to 600 DEG C, the reaction time is 2-90 min, and after gas-solid separation is conducted on a cracking reaction product, condensation is conducted on the gas, and the fuel oil with the high alkane content is obtained. By means of the method for preparing the fuel oil with the high alkane content by co-cracking the non-edible grease and the waste plastic, according to the problems that the plastic structure is compact and coking is serious in the cracking process, the swelling effect of the grease on the plastic and the characteristic that glycerin residues in the grease release free state hydrogen atoms under specific cracking conditions are fully utilized. The stable and high-quality liquid fuel oil of which the oil productivity is over 85% and the alkane content reaches up to 74% is obtained.

Description

Technical field [0001] The invention belongs to the fields of environmental chemical engineering and new energy chemical engineering. Background technique [0002] Compared with fossil fuels, the biggest advantage of biofuels is its renewability and zero emission. At present, animal fats and vegetable fats (both are triglycerides) are the main raw materials for obtaining biofuels. Renewable fuel oil can be obtained from triglyceride through thermal cracking and other thermochemical means, and the production process has a considerable hydrogen surplus. At the same time, there are a large number of waste gas plastics in municipal solid waste and agricultural production, which form white pollution because they are difficult to be biodegraded in nature. The main component of plastics is polymerized olefins. There have been many studies on the production of unsaturated hydrocarbons by high-temperature thermal cracking or catalytic cracking of waste plastics. In many cases, it can onl...

Claims

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Application Information

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IPC IPC(8): C10G1/00C10G3/00
CPCY02P30/20
Inventor 刘玉环王允圃王小亮阮榕生
Owner 浙江加宝新能源科技有限公司
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