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Method for preparing hydrocarbon-rich oil by co-pyrolysis of lignite and soap stock

A technology of rich hydrocarbon oil and co-pyrolysis, applied in the field of coal pyrolysis, can solve the problem of high cost of hydrogen, achieve continuous operability, shorten the pyrolysis reaction time, and promote the effect of lightening

Inactive Publication Date: 2018-12-21
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydropyrolysis can increase the yield of light hydrocarbon components, but the cost of hydrogen is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 50g of Shengli lignite and 50g of dried soapstock, mix them evenly, crush them to a particle size of 1-2mm, and place them in a screw feeder. After filling silicon carbide balls with a particle size of 4 cm in a quartz bottle with upper and lower openings, the quartz bottle was placed in a microwave pyrolysis furnace and heated to 550°C. Turn on the screw feeder, and slowly add the mixture of lignite and dry soapstock into the silicon carbide spheres through the top of the quartz bottle for pyrolysis. The generated pyrolysis steam is introduced into the pipe reactor filled with HZSM-5 catalyst (silicon-aluminum ratio=40) through the lower port of the quartz bottle under the action of the air pump, and catalytic reforming is carried out at 450 °C. The reformed product was condensed to 60°C through a condenser, and 23.2 g of hydrocarbon-rich oil was collected. According to GC-MS analysis, the hydrocarbon content in the hydrocarbon-rich oil reaches 86.7%.

Embodiment 2

[0022] Weigh 25g of Shengli lignite and 75g of dried soapstock, mix them evenly, crush them to a particle size of 0.5-1mm, and place them in a screw feeder. After filling silicon carbide balls with a particle size of 2 cm in a quartz bottle with upper and lower openings, the quartz bottle was placed in a microwave pyrolysis furnace and heated to 600°C. Turn on the screw feeder, and slowly add the mixture of lignite and dry soapstock into the silicon carbide spheres through the top of the quartz bottle for pyrolysis. The generated pyrolysis steam is introduced into the pipeline reactor filled with HZSM-5 catalyst (silicon-aluminum ratio = 28) through the lower port of the quartz bottle under the action of the suction pump, and catalytic reforming is carried out at 550°C. The reformed product was condensed to 60°C through a condenser, and 34.4 g of hydrocarbon-rich oil was collected. According to GC-MS analysis, the hydrocarbon content in the hydrocarbon-rich oil reaches 92.8%....

Embodiment 3

[0024] Weigh 50g of Shengli lignite and 50g of dried soapstock, mix them evenly, crush them to a particle size of 1-2mm, and place them in a screw feeder. After filling silicon carbide balls with a particle size of 2.5 cm in a quartz bottle with upper and lower openings, the quartz bottle was placed in a microwave pyrolysis furnace and heated to 650°C. Turn on the screw feeder, and slowly add the mixture of lignite and dry soapstock into the silicon carbide spheres through the top of the quartz bottle for pyrolysis. The generated pyrolysis steam is introduced into the pipe reactor filled with HZSM-5 catalyst (silicon-aluminum ratio = 80) through the lower port of the quartz bottle under the action of the suction pump, and catalytic reforming is carried out at 600 °C. The reformed product was condensed to 80°C through a condenser, and 19.9 g of hydrocarbon-rich oil was collected. According to GC-MS analysis, the hydrocarbon content in the hydrocarbon-rich oil reaches 88.5%.

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Abstract

The invention discloses a method for preparing hydrocarbon-rich oil by co-pyrolysis of lignite and soap stock, wherein the lignite and soap stock are mixed in a mass ratio of 1:1-10, and heated to 500-800 DEG C with microwave as a heat source for pyrolysis; the generated pyrolysis vapor is introduced into a reaction apparatus packed with HZSM-5 catalyst for catalytic reforming at a catalytic temperature of 300 to 600 DEG C, and the reformed product is condensed to form a hydrocarbon-rich oil. The method of the invention not only greatly shortens the pyrolytic time, but also effectively increases the content of hydrocarbons in the pyrolytic oil and improves the quality of the pyrolytic oil.

Description

technical field [0001] The invention belongs to the technical field of coal pyrolysis, and relates to coal hydropyrolysis, in particular to a method for co-pyrolyzing coal with soapstock as a hydrogen-rich raw material. Background technique [0002] Coal is a complex mixture composed of various organic polymer compounds and minerals with a low H / C atomic ratio. In the low-temperature pyrolysis technology of coal, the yield of light hydrocarbon liquid products is not high. Hydropyrolysis can increase the yield of light hydrocarbon components, but the cost of hydrogen is high. [0003] Coal-based co-pyrolysis technology is based on the hydrogen-rich properties of high-molecular organic waste, using cheap hydrogen-rich raw materials instead of hydrogen and mixing coal with low-temperature pyrolysis of coal to improve the yield of light hydrocarbon components in pyrolysis tar. content. By adding oil shale, biomass or waste polymer plastics and waste rubber powder materials to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00C10B53/00C10B57/00C10B57/04
CPCC10G1/002C10B53/00C10B57/00C10B57/04C10G2300/1003
Inventor 杜朕屹秦志峰
Owner TAIYUAN UNIV OF TECH
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