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Method for co-liquefaction of coal and waste plastics under mild condition

A co-liquefaction technology of waste plastics, which is applied in the preparation of liquid hydrocarbon mixtures and the petroleum industry, can solve the problems of obvious aromatization and expensive catalysts, and achieve the effects of low cost, reduced cost and improved utilization rate

Inactive Publication Date: 2012-02-08
LIUPANSHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that ammonium molybdate and HZSM-5 zeolite catalysts are the most commonly used effective catalysts in the co-liquefaction of coal and plastics and coal and mixed waste plastics, which can significantly increase the cracking reaction rate, but the aromatization effect of HZSM-5 catalyst is obvious, Compared with other catalytic cracking agents, it produces more gas products, and the catalyst is more expensive. The price of a high-quality HZSM-5 catalyst is about 200,000 yuan per ton

Method used

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  • Method for co-liquefaction of coal and waste plastics under mild condition
  • Method for co-liquefaction of coal and waste plastics under mild condition
  • Method for co-liquefaction of coal and waste plastics under mild condition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Firstly, the lignite is crushed, divided, and ground to less than 100 meshes according to national standards, and is heated at a temperature of about 90°C and a vacuum degree of 10 -2 Baking under mmHg until the moisture content is less than 1.0% is used as a liquefaction test sample.

[0030] The equipment used in the experiment is the GSHA-1.5L autoclave produced by Shandong Penglai Luwu Chemical Machinery Co., Ltd.

[0031] Add 9.0g of coal, 3.0g of polyethylene, 0.24g of sodium lignosulfonate, 0.12g of boron trifluoride-diethyl ether, and 27.0g of phenol into the autoclave, and replace nitrogen three times and then introduce hydrogen into the autoclave. Pressurize to 1.0Mpa, then raise the temperature to 300°C at a heating rate of about 10°C / min and keep the temperature constant for 30min until the liquefaction reaction is complete.

[0032] After the gas was collected after the autoclave hydrogenation liquefaction test, the gas phase composition was analyzed with ...

Embodiment 2

[0036] First, the mixture of lignite and bituminous coal is crushed, divided, and ground to less than 100 meshes according to national standards, and the -2 Baking under mmHg until the moisture content is less than 1.0% is used as a liquefaction test sample.

[0037] The equipment used in the experiment is the GSHA-1.5L autoclave produced by Shandong Penglai Luwu Chemical Machinery Co., Ltd.

[0038]Add 20.0g of lignite and bituminous coal mixture, 10.0g of polystyrene, 1.2g of magnesium lignosulfonate, 0.9g of boron trifluoride-phenol, and 60.0g of phenol into the autoclave, and replace nitrogen three times. Introduce hydrogen and pressurize to 5.0Mpa. Then the temperature was raised to 400°C at a heating rate of about 10°C / min and kept at a constant temperature for 30 minutes until the liquefaction reaction was completed. The weight ratio of lignite and bituminous coal in the test does not need to be strictly limited.

[0039] After the gas was collected after the autocla...

Embodiment 3

[0043] First, the bituminous coal is crushed, shrunk, and ground to less than 100 mesh according to national standards, and the temperature is about 90°C and the vacuum degree is 10 -2 Baking under mmHg until the moisture content is less than 1.0% is used as a liquefaction test sample.

[0044] The equipment used in the experiment is the GSHA-1.5L autoclave produced by Shandong Penglai Luwu Chemical Machinery Co., Ltd.

[0045] Add 12.0 g of bituminous coal, 4.0 g of polyethylene, 0.48 g of ammonium lignosulfonate, 0.16 g of boron trifluoride-ether, and 36.0 g of phenol into the autoclave, and replace the nitrogen three times with hydrogen. Pressurize to 3.0Mpa. Then the temperature was raised to 400°C at a heating rate of about 10°C / min and kept at a constant temperature for 30 minutes until the liquefaction reaction was completed.

[0046] After the gas was collected after the autoclave hydrogenation liquefaction test, the gas phase composition was analyzed with a gas chro...

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Abstract

The invention is a method for co-liquefaction of coal and waste plastics under a mild condition, which comprises the following steps: adding coal, waste plastics, lignosulfonate, a catalyst, and a solvent into an autoclave, introducing hydrogen to increase the pressure to 1.0-10.0 Mpa, heating to 300-450 DEG C for a liquefaction reaction, collecting the gas after the hydrogenation liquefaction test in the autoclave, analyzing the gas phase composition by a gas chromatography, collecting all the other liquefaction products in a filter paper cylinder, performing hexane and tetrahydrofuran solvent extraction in order by a soxhlet extraction device, wherein the substance soluble in hexane is oil, and the substances soluble in tetrahydrofuran but insoluble in hexane are asphaltene and preasphaltene, and calculating the total conversion rate of the liquefaction by using the amount of the insoluble substances in tetrahydrofuran. The invention allows the coal to perform a depolymerization reaction at a low temperature, and to be co-liquefied with waste plastics; the extraction rate of coal by solvents such as pyridine and the like is increased, and the coal liquefaction process is accelerated; not only the hydrogen consumption and production cost for coal liquefaction are greatly reduced, but also white pollution caused by waste plastics is solved.

Description

technical field [0001] The invention belongs to the technical field of coal chemical processing, in particular to a method for co-liquefying coal and waste plastics under mild conditions. Background technique [0002] Petroleum resources are increasingly scarce in the 21st century, and my country's sustained and rapid economic development is increasingly dependent on imported oil year by year. In 2009, it reached a record high. The total net oil imports exceeded 160 million tons, and the dependence on oil imports has exceeded 50%. It has brought huge challenges and major threats to the national economy and national development. [0003] In contrast, my country is rich in coal resources. Coal reserves account for about 90% of the country's mineral resource reserves and 95% of fossil energy. It has huge resource potential, and its mining is in a state of excess and limited production. At the same time, coal Extensive utilization has caused serious environmental pollution probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/10C10G1/06C10G1/00
Inventor 杜琨范志芳李志
Owner LIUPANSHUI NORMAL UNIV
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