Method for preparing hydrocarbon with catalysis copyrolysis of biomass and polymer

A hydrocarbon and biomass technology, which is used in the production of hydrocarbons from oxygen-containing organic compounds and hydrocarbon cracking to produce hydrocarbons, etc., can solve the problems of low octane number of liquid oil, low yield of light oil, and hindering wide application. , to achieve the effect of reducing the reaction pressure, reducing the cracking temperature and increasing the octane number

Inactive Publication Date: 2009-08-19
ZHEJIANG UNIV
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Problems solved by technology

The separate pyrolysis of waste plastics still has problems such as high paraffin yield, l

Method used

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  • Method for preparing hydrocarbon with catalysis copyrolysis of biomass and polymer

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Experimental program
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Effect test

Embodiment 1

[0028] Refer to attached drawing 1

[0029] Step 1: remove foreign matter from waste and polymer, crush, dry at 110°C for half an hour, mix according to the dry biomass: polymer weight ratio of 10-2:1, and enter the furnace reactor through vacuum feeder 1 In 2, add naphthalene or alcohol hydrogenation solvent according to solvent: raw material weight ratio is 8~4:1;

[0030] Step 2: Exhaust the air in the furnace reactor 2, and feed hydrogen or nitrogen with a pressure of 2-6KPa.

[0031] Step 3: The temperature is raised to 320-450° C. for cracking reaction, and the reaction time is 30 minutes to 6 hours.

[0032] Step 4: After the reaction is completed, the gaseous substances in the reactor 2 pass through the cyclone separator 3 to separate the hydrocarbon solids.

[0033] Step 5: The gaseous hydrocarbons are collected through the high-temperature gas filter 5 and the cyclone condenser 7 to obtain hydrocarbon liquid products, which are collected in the collector 9 .

[00...

Embodiment 2

[0038] According to the preparation steps and method of Example 1, the cracking was carried out in a pressure-resistant reactor. Dry 1 kg of rice husk at 110°C for half an hour, remove foreign matter from waste tires, crush them, and dry at 110°C for half an hour, take 0.125 kg each, mix and dissolve in 5 kg of ethanol, add a metal oxide catalyst according to 1.5% of the weight of the raw materials, Exhaust the air, pass H2 with an initial pressure of 2KPa, heat up to 380°C, crack for 4 hours, cool down to 80°C, use a post-processing system to collect hydrocarbon gas products rich in C1-C4, and obtain hydrocarbon liquid products and residues at the same time . The resulting liquid was divided into oil phase and water phase, extracted and weighed. Liquid products were analyzed by GC-MS. The conversion rate of the total mixed waste was 62%, the total product consisted of 30% hydrocarbon gas, 54% hydrocarbon liquid and 16% residue. Hydrocarbon Liquid Octane 78. The hydrocarbo...

Embodiment 3

[0040] According to the preparation steps and method of Example 1, the cracking was carried out in a pressure-resistant reactor. Dry corncobs at 110°C for half an hour, waste plastics: waste tires at a weight ratio of 1:1 to remove foreign matter, crush them, dry at 110°C for half an hour, mix and dissolve them in naphthalene-based additives at a weight ratio of corncobs to polymers of 4:1 In the hydrogen solvent, the weight ratio of solvent to raw material is 4:1, and molecular sieve catalyst is added according to 1% of the weight of the raw material, the pressure is 6KPa, the temperature is raised to 400° C., and cracked for 3 hours. The conversion rate of the total mixed waste is 60%, the total product consists of 32% hydrocarbon gas, 51% hydrocarbon liquid and 17% residue. Hydrocarbon Liquid Octane 77.

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Abstract

The invention provides a method for preparing carbon-hydrogen compound by catalytic co-pyrolysis of biomass and polymer. The biomass and polymer waste are taken as raw material and the carbon-hydrogen compound is prepared by catalytic co-pyrolysis technology. The pyrolysis is carried out in a pressure-proof reactor; the biomass comprises agriculture and forestry processing waste of rice hull, wheat straw, mao bamboo, corn and the like; the polymer waste comprises polystyrene, polyethylene, polypropylene, scrap tire, daily waste plastic and the like. The reaction conditions are as follows: thepressure is 2-6 KPa, the reaction gas is hydrogen or nitrogen, vacuum and no oxygen, the pyrolysis temperature is 320-450 DEG C and the time is 30 minutes to 6 hours. The conversion rate of the overall mixed waste is 55-64%, carbon-hydrogen compound gas accounts for 20-33% of overall product, carbon-hydrogen compound liquid accounts for 60-58% of overall product and residua accounts for 14-19% ofoverall product.

Description

technical field [0001] The invention relates to a technology for preparing hydrocarbons by using mixed waste, in particular, the preparation of hydrocarbons by catalytic co-cracking technology using biomass and polymer waste as raw materials. Background technique [0002] my country's biomass resources are very rich. The national theoretical biomass energy resources are about 5 billion tons of standard coal, of which 700 million tons can be developed. At present, biomass is mainly used as fuel for rural life, and is even burned as waste, which not only causes waste of resources, but also pollutes the environment. Due to the depletion of mineral resources, more and more scientists are paying attention to the efficient conversion and utilization of renewable resources, waste tires and plastics. Recycled materials come from a wide range of sources, including municipal solid waste, agricultural and forestry resources, poultry manure, waste tires, etc. Statistics show that the ...

Claims

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Application Information

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IPC IPC(8): C07C1/24C07C4/06
Inventor 崔艳丽毛建卫
Owner ZHEJIANG UNIV
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