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Method for preparing hydrocarbon compounds in biomass self-catalysis copyrolysis way

A biomass and autocatalysis technology, applied in the preparation of liquid hydrocarbon mixtures, petroleum industry, etc., can solve the problems of increased cost, low yield, low efficiency, etc., and achieve recycling, conversion rate improvement, and cost reduction. Effect

Inactive Publication Date: 2010-06-16
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has obvious defects, namely high energy consumption, low efficiency, low yield and poor selectivity.
Therefore, people quickly developed a catalytic thermal cracking method. Adding a catalyst in the thermal cracking stage can reduce the activation energy required for raw material cracking, reduce energy consumption, improve efficiency, and can also increase the selectivity of products. Therefore, this method Compared with the thermal cracking method, it has obvious advantages, but the cost is increased due to the use of catalyst, and the catalyst itself is not easy to recycle

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Remove foreign matter from the mixed waste, crush and dry, mix according to the dry rice husk:polymer weight ratio of 10-1:1, and add catalyst additives in an amount of 0.5-3.5% of the raw material weight;

[0025] Step 2: feed hydrogen or nitrogen to discharge the air in the reactor;

[0026] Step 3: heat up to 400-550°C for cracking reaction, and the reaction time is 1-6 hours;

[0027] Step 4: Collect gaseous products while cracking. The hydrocarbon gas containing C1~C4 is condensed at low temperature to obtain liquefiable gas;

[0028] Step 5: Collect the liquid product while cracking, and collect the liquid product after being condensed by the condenser. Obtain hydrocarbon liquid product through layering again;

[0029] Step 6: Treat the liquefiable gas in the hydrocarbon gas containing C1-C4 through a liquefiable gas post-processor to obtain a hydrocarbon liquefiable product. The non-liquefiable gas is introduced into the combustion chamber to provide ...

Embodiment 2

[0034] According to the preparation steps and method of Example 1, cracking was carried out in a normal pressure reactor. Dry the rice husk at 110°C for half an hour, remove foreign matter from waste polypropylene, crush it, and dry at 110°C for half an hour, take 0.125 kg each, add metal oxide alumina catalyst additives according to 2.5% of the weight of the raw material, and pass through H 2 Exhaust air, heat up to 460°C, crack for 3 hours, collect gas products while cracking, hydrocarbon gases containing C1~C4 are condensed at low temperature to obtain liquefiable gas; collect liquid products while cracking, and collect liquid products after condensing through a condenser , and then through stratification to obtain hydrocarbon liquid products; at the same time, water-soluble oxygen-containing organic compounds and residues are obtained. The residue is post-treated to obtain amorphous silicon. Liquid products were analyzed by GC-MS. The conversion rate of the total mixed w...

Embodiment 3

[0036]According to the preparation steps and method of Example 1, cracking was carried out in a normal pressure reactor. Bamboo powder is dried at 110 DEG C for half an hour, waste plastics: waste polyethylene (removing foreign matter) weight ratio is 1: 1, pulverizes, dried at 110 DEG C for half an hour, adds aluminate catalyst auxiliary agent by 3% of raw material weight, heats up Cleavage at 500°C for 4 hours. Gas products are collected while cracking, and hydrocarbon gases containing C1-C4 are condensed at low temperature to obtain liquefied gas; liquid products are collected while cracking, and liquid products are collected after being condensed by a condenser, and then hydrocarbon liquid products are obtained through layering; At the same time, water-soluble oxygen-containing organic compounds and residues are obtained. The residue is post-treated to obtain amorphous silicon. Liquid products were analyzed by GC-MS. The conversion rate of the total mixed waste is 72%, ...

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Abstract

The invention relates to a method for preparing hydrocarbon compounds in a biomass self-catalysis copyrolysis way, which is realized in a way as follows: biomass and polymer waste are used as raw materials, and a catalyst adjuvant is added to prepare the hydrocarbon compounds by using a biomass self-catalysis copyrolysis technique; the pyrolysis is carried out in a normal pressure reactor; and the reaction is carried out in the reaction atmosphere of hydrogen, nitrogen or vacuum without oxygen at the pyrolysis temperature of 400-550 DEG C for 1-6 hours. In the invention, the total conversion rate of mixed waste reaches 65-81%, and the content of hydrocarbonaceous gases in the total product is 10-20%; and the hydrocarbon compounds contain 38-56% of liquid, 19-25% of oxygenic organic substances and 14-19% of residues. The hydrocarbon compound products of the invention comprise gas hydrocarbons, oily hydrocarbons, oxygenic organic substances and amorphous silicon.

Description

technical field [0001] The invention relates to a technology for preparing hydrocarbons by using mixed wastes, specifically preparing hydrocarbons by using biomass and polymer wastes as raw materials through autocatalytic co-cracking technology. Background technique [0002] At present, China's big cities are suffering from garbage dilemma, and people are also facing the shortage of resources and energy. In many countries, the main composition of solid waste is 65% cellulosic and lignin-derived materials, 15% polymeric materials and 20% inorganic materials. Polymers are artificially synthesized polymers made from natural resources such as petroleum, natural gas, and coal. The commonality between them and biomass is that they are bulk materials rich in hydrocarbon elements. my country is the largest rice-growing country in the world. According to statistics from the Ministry of Agriculture, my country’s rice output in 2005 was 180.59 million tons, and rice husks usually acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00C10G1/10
Inventor 崔艳丽陈慧明赖腾毛建卫
Owner ZHEJIANG UNIV
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