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Cracking method of waste plastic

A technology of waste plastics and pyrolysis reaction, which is applied in the preparation of liquid hydrocarbon mixtures, the petroleum industry, and the treatment of hydrocarbon oils. It can solve the problems of low conversion rate of energy grass and low utilization of cellulose acetate resources, and reduce white pollution. problems, achieve efficient and clean utilization, and reduce dependence

Inactive Publication Date: 2016-07-06
SOUTH CHINA UNIV OF TECH
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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 provide a method of catalytic cracking of energy grass and cellulose acetate that can solve the problems of low conversion rate of energy grass and low resource utilization of cellulose acetate.

Method used

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  • Cracking method of waste plastic

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Weigh 5kg Juneng grass, dry it at 100°C for 0.5h before use, weigh 3kg of cellulose acetate waste plastic and 2kg of PE waste plastic at the same time, dry it at 100°C for 0.5h before use, after pulverization and mixing , preheated to 100°C, kept warm for 1 hour, placed in a pyrolysis reactor for co-thermal cracking reaction, passed carrier gas nitrogen, the temperature rose to 450°C, kept warm for 4 hours, while the pyrolysis reaction was proceeding, the gaseous products entered the catalyst The catalytic reforming tower, the catalyst is the HBeta molecular sieve after Zn modification, the amount of the catalyst is 1% of the raw material weight, which is 0.1kg, the remaining catalyst in the catalytic reforming tower is returned to the catalytic reforming tower for recycling, and the non-condensable gas Return to the cracking reactor again for reuse, and finally, separate the liquid products to obtain biofuel products such as propylene, furfural, butane, etc., with an oi...

Embodiment 2

[0038] Weigh 3kg Juneng grass, dry it at 100°C for 0.5h, and then use it. At the same time, weigh 5kg of cellulose acetate plastic and 2kg of PE waste plastic, dry it at 100°C for 0.5h, and then use it. After pulverizing and mixing, Preheat to 100°C, keep it warm for 1 hour, put it in a pyrolysis reactor for co-thermal cracking reaction, pass the carrier gas nitrogen, the temperature rises to 500°C, keep it warm for 4 hours, while the pyrolysis reaction is going on, the gaseous product enters the reactor with catalyst Catalytic reforming tower, catalyst is HBeta molecular sieve after Zn modification, and the amount of catalyst is 2% of raw material weight, is 0.2kg, and the remaining catalyst in catalytic reforming tower returns catalytic reforming tower to recycle, and noncondensable gas is again Return to the cracking reactor for reuse. Finally, the liquid product is separated to obtain bio-fuel products such as propylene, furfural and butane. The oil yield is 35%, and it is ...

Embodiment 3

[0040] Weigh 3 kg of Jujuncao and 2 kg of Junengcao, dry at 100°C for 0.75h and set aside, weigh 3kg of cellulose acetate plastic and 2kg of PE waste plastic, dry at 100°C for 0.5h, set aside for use, after powder Purely mix, preheat to 120°C, keep warm for 1 hour, place it in a pyrolysis reactor for co-thermal cracking reaction, pass carrier gas nitrogen, the temperature rises to 550°C, keep warm for 4 hours, while the pyrolysis reaction is going on, the gaseous products enter Add the catalytic reforming tower of catalyst, catalyst is the HBeta molecular sieve after Fe modification, and the amount of catalyst is 1% of raw material weight, is 0.1kg, and the remaining catalyst in the catalytic reforming tower returns catalytic reforming tower to recycle, The non-condensable gas is returned to the pyrolysis reactor for reuse. Finally, the liquid product is separated to obtain bio-fuel products such as propylene, furfural, butane, etc., and the oil yield is 35%. After fractional d...

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Abstract

The invention discloses a cracking method of waste plastic. The cracking method includes: using energy grass and hydrocarbon waste plastic as raw materials; preparing biofuel through co-thermal cracking catalysis technology, wherein the hydrocarbon waste plastic is mainly composed of cellulose acetate. The cracking method is simple in whole process and low in energy consumption, the energy grass and the hydrocarbon plastic are synergistic, hydrogen transfer in the plastic and oxygen-containing functional group in the energy grass are combined, breaking of C-C and C-H bonds is facilitated, and oil yield is increased. By using the cracking method, the energy grass and the hydrocarbon waste plastic are recycled, the environment problem caused by improper treatment of the energy grass and the hydrocarbon plastic is reduced, and efficient and clean utilization of solid waste is realized.

Description

technical field [0001] The invention relates to a technology for preparing bio-fuel by using mixed solid waste, in particular to a co-thermal cracking method of energy grass and hydrocarbon plastics mainly composed of cellulose acetate. Background technique [0002] At present, the consumption of plastic products in China is huge, 80% of which are olefin polymers, and about 20 million tons of waste plastics are produced in China every year. Due to technical reasons, the recycling rate of plastics in my country is only 20%, forming A huge waste of resources. At the same time, people are also facing the problem of energy shortage. Energy and environmental issues have become two major themes in today's world. [0003] As one of the most promising biomass resources, energy grass is rich in cellulose, hemicellulose and lignin in lignocellulose. From the perspective of material composition, the sulfur content of energy grass is very low (0.12%), There is little carbon dioxide re...

Claims

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Application Information

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IPC IPC(8): C10G1/00
CPCC10G1/00C10G2300/1003
Inventor 黄少斌曹亚亚陈朋飞
Owner SOUTH CHINA UNIV OF TECH
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