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Method for microwave pyrolysis of waste plastics

A technology for waste plastics and high-temperature cracking, which is used in the preparation of liquid hydrocarbon mixtures, special forms of dry distillation, petroleum industry, etc. It can solve the problems of unsatisfactory efficiency and product composition, and low working temperature.

Active Publication Date: 2020-05-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many patents disclosing the technology of using this characteristic of microwave to carry out thermal cracking, such as patent CN102585860A, patent CN103252226A, patent CN106520176A, etc., but they all use ordinary microwave sensitive materials such as silicon carbide to generate heat and transmit heat in a microwave field. To the pyrolysis material, so as to achieve the purpose of pyrolysis, the working temperature of this method is not high, and the efficiency and product composition are not ideal

Method used

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  • Method for microwave pyrolysis of waste plastics
  • Method for microwave pyrolysis of waste plastics
  • Method for microwave pyrolysis of waste plastics

Examples

Experimental program
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Effect test

Embodiment 1

[0069] (1) Measure 500ml of graphene oxide aqueous dispersion (JCGO-95-1-2.6-W, 10mg / ml, Nanjing Jicang Nano Technology Co., Ltd.) in a beaker;

[0070] (2) Take 2g of the porous skeleton made of phenolic resin (phenolic foam, average pore size 300 μm, porosity 99%, Changshu Oasis Flower Foam Co., Ltd.) and soak it into the graphene oxide aqueous dispersion, so that the solution fully enters the pores of the porous skeleton;

[0071] (3) Take out the soaked porous material, put it in a stainless steel tray, heat it in an oven at 180°C for 1 hour, dry it and pre-reduce it;

[0072] (4) Put the dried porous material into a household microwave oven (700w) for high-heat microwave treatment for 2 minutes, the pre-reduced graphene oxide is reduced to graphene, and the phenolic resin skeleton is carbonized into a carbon skeleton (average pore size 200 μm, porosity 99%) , to obtain a graphene-loaded carbon porous framework porous composite material that generates arcs in microwaves, a...

Embodiment 2

[0074] (1) Measure 500ml of carbon nanotube dispersion (XFWDM, 100mg / ml, Nanjing Xianfeng Nano Material Technology Co., Ltd.) into a beaker;

[0075] (2) Take 2 g of porous skeleton made of phenolic resin (phenolic foam, average pore size 200 μm, porosity 99%, Changshu Oasis Flower Foam Co., Ltd.) and soak it into the carbon nanotube dispersion, so that the carbon nanotube dispersion can fully enter the porous skeleton the tunnel;

[0076] (3) Take out the soaked porous material, place it in a stainless steel tray, heat it in an oven at 80°C for 5 hours, and dry it;

[0077] (4) Put the dried porous material into a tube furnace, and carbonize it at 800° C. for 1 h under a nitrogen atmosphere to obtain a porous composite material (the average pore diameter of the carbon skeleton is 140 μm and the pores are rate of 99%), carbon nanotubes accounted for 30% of the total mass of the porous composite material.

Embodiment 3

[0079] (1) Measure 500ml of carbon nanotube dispersion (XFWDM, 100mg / ml, Nanjing Xianfeng Nano Material Technology Co., Ltd.) into a beaker;

[0080] (2) Take 5 g of silicate fiber cotton-like porous skeleton (average pore diameter 150 μm, porosity 90%, Shandong Luyang Energy Saving Materials Co., Ltd.) soaked in the carbon nanotube dispersion, extruded several times to make the dispersion The liquid fully enters the pores of the porous framework;

[0081] (3) Take out the soaked porous material, put it in a stainless steel tray, place it in a 150° C. oven and heat it for 2 hours, and dry it to obtain a porous composite material with a carbon nanotube loaded silicate fiber porous skeleton that generates an arc in the microwave, carbon The nanotube accounts for 10% of the total mass of the porous composite material.

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Abstract

The invention discloses a method for microwave pyrolysis of waste plastics. The method comprises the steps that the waste plastic makes contact with a porous composite material, a microwave field is applied to the waste plastic and the porous composite material in an inert atmosphere or in a vacuumizing mode, and the porous composite material generates electric arcs under microwaves, so that the high temperature is rapidly reached and the waste plastic is cracked. According to the method, the porous composite material capable of generating electric arcs in microwaves is used for generating electric arcs in microwaves, so that high temperature is rapidly generated, waste plastic is cracked into chemical raw materials, the process is efficient, and the additional value of product compositionis high.

Description

technical field [0001] The invention relates to the technical field of utilization of waste plastic resources, in particular to a method for microwave high-temperature pyrolysis of waste plastics. Background technique [0002] Since the 1950s, humans have produced 8.3 billion tons of plastic, of which 6.3 billion tons have become waste. Of the 6.3 billion tons of waste plastic, 9% was recycled, 12% was incinerated, and the remaining 79% (nearly 5.5 billion tons) was buried in landfills or accumulated in the natural environment. Human beings are still accelerating the production of plastics. At present, the output of plastics has reached 400 million tons per year. It is estimated that by 2050, there will be 12 billion tons of waste plastics in the world. More than 8 million tons of plastic enter the ocean every year, and if left unchecked, there will be more plastic waste than fish in the ocean by 2050. In recent years, top international journals have successively published...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00C10B53/07
CPCC10B53/07C10G1/00C10G2300/1003Y02P20/143
Inventor 蒋海斌乔金樑张晓红刘文璐戚桂村宋志海高建明蔡传伦王湘赖金梅李秉海茹越张红彬韩朋张江茹郭照琰姜超
Owner CHINA PETROLEUM & CHEM CORP
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