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A method for preparing fuel oil with high alkane content by co-pyrolysis of non-edible oil 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, prevent backflow to dining tables, solve environmental pollution problems, and improve oil quality.

Active Publication Date: 2017-06-20
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 ​​4 cm 2 nearly square fragments.

[0023] (2) Mix the discarded low-density polyethylene plastic fragments in step (1) and eucalyptus oil in a mass ratio of 1:1.

[0024] (3) Send the mixed material in step (2) into the cracking reactor, replace the air in the reactor with nitrogen, and raise 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 raise the temperature, control the cracking reaction temperature at 400°C, and the reaction time is 20 minutes. After the cracking reaction product is separated from gas and solid, 51.3 grams of liquid fuel oil can be obtained from the condensable liquid in the gas product. After analysis, the alkane content is as high as 74%, and the total insoluble matter of the rectified liquid fuel oil 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 ​​3 cm 2 nearly square fragments.

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

[0028] (3) Send the mixed material in step (2) into the cracking reactor, replace the air in the reactor with nitrogen, and raise the temperature at a rate of 25 °C / min. When the temperature of the reactant reaches 150 °C, turn on the stirring device, The cracking reaction temperature was controlled at 450°C, and the reaction time was 18 minutes. After the cracking reaction product was separated from gas and solid, 64 grams of liquid fuel oil was obtained from the condensable liquid in the gas product. After analysis, the alkane content is as high as 76%, and the total insoluble matter of the rectified liquid fuel oil 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 ​​2 cm 2 nearly square fragments.

[0031] (2) Mix the discarded polypropylene plastic fragments in step (1) and eucalyptus oil in a mass ratio of 1:2.

[0032] (3) Send the mixed material in step (2) into the cracking reactor, replace the air in the reactor with nitrogen, and raise the temperature at a rate of 30 °C / min. When the temperature of the reactant reaches 150 °C, turn on the stirring device , the pyrolysis reaction temperature was controlled at 500°C, and the reaction time was 17 minutes. After the pyrolysis reaction product was separated from gas and solid, 77 grams of liquid fuel oil was obtained from the condensable liquid in the gas product. After analysis, the alkane content is as high as 75.2%, and the total insoluble matter in the rectified liquid fuel oil 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 industry. Background technique [0002] Compared with fossil fuels, the biggest advantage of biofuels is that they are renewable and zero-emission. At present, animal fats and vegetable fats (both are triglycerides) are the main raw materials for obtaining biofuels. Triglycerides can be used to obtain renewable fuels through thermal cracking and other thermochemical means, and the production process has considerable hydrogen surplus. At the same time, there are a large amount 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 preparation of unsaturated hydrocarbons by high-temperature pyrolysis or catalytic cracking of waste plastics. In many cases, they can o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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