Method for liquefying liquid-solid medium barrier plasma coal under atmospheric normal pressure
A plasma and dielectric barrier technology, which is applied in the preparation of liquid hydrocarbon mixtures and the petroleum industry, can solve the problems of harsh reaction conditions and high costs, and achieve the effects of mild conditions, easy control, and low energy consumption
Inactive Publication Date: 2009-07-22
SOUTHEAST UNIV
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[0002] The traditional direct coal liquefaction method is to complete the hydrogenation liquefaction reaction of coal under high temperature and high pressure conditions. The reaction conditions are harsh and the cost is high.
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[0019] Atmospheric normal pressure liquid-solid dielectric barrier (DBD) plasma coal direct liquefaction method, the material of the present invention selects dielectric barrier (DBD) plasma reactor to be quartz material, because the dielectric constant of quartz glass is very high, expansion coefficient is low, High temperature resistance, chemical stability, and electrical insulation are relatively good, and it is a good dielectric, which can stabilize and enhance the electric field in the reactor. The reactor adopts a line-pipe structure, and the reaction temperature for forming coal liquefaction products is controlled at 150°C to 180°C. A strong local electric field can be formed near the electrode line; the formed non-uniform electric field is strong inside and weak outside, which effectively avoids the phenomenon of gas breakdown; it can discharge in the entire reactor, and the plasma spreads throughout the entire reactor. The quartz medium forms a dielectric barrier dis...
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Abstract
Atmospheric normal pressure liquid-solid dielectric barrier plasma coal liquefaction method is a method to achieve coal hydrogenation liquefaction under the condition of atmospheric pressure, the plasma is generated in the form of dielectric barrier discharge, in the quartz dielectric barrier A liquid-solid mixture of coal particles and a hydrogen-donating solvent is added to the plasma reactor to form a dielectric barrier discharge reaction system in the liquid-solid reaction phase. The entire reaction system is input with a high-voltage and high-frequency electric field, the high-frequency and high-voltage electric field has a peak voltage of 3000-20000 volts, and a pulse power supply frequency of 500-30000 Hz. Under atmospheric and normal pressure conditions, due to the action of high-voltage and high-frequency electric fields, a thin layer of plasma is formed on the solid surface of coal particles, and the hydrogen-donating solvent is dehydrogenated in the liquid-solid reaction system to generate active hydrogen ions. The plasma thin-layer electrons collide with the solid surface of coal particles to form free radical fragments of coal, which combine with hydrogen ions to form coal liquefaction products. Coal liquefaction products include medium oil, asphaltenes and pre-asphaltenes.
Description
technical field [0001] The invention relates to a method for realizing coal hydrogenation liquefaction under the condition of atmospheric pressure under the action of liquid-solid dielectric barrier (DBD) plasma, and belongs to the technical field of direct coal liquefaction methods. Background technique [0002] The traditional direct coal liquefaction method is to complete the hydrogenation liquefaction reaction of coal under high temperature and high pressure conditions, the reaction conditions are harsh and the cost is high. Plasma is a high-energy state composed of electrons, ions, atoms, molecules, free radicals, etc. The unique chemical activity and high reactivity of plasma make many chemical reactions that are difficult or impossible to achieve by traditional methods possible. Many research results of plasma coal treatment technology have been produced: Chakravartty of India's Central Fuel Institute, Baumann of Germany, and Dr. Xie Kechang of China have all conducte...
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IPC IPC(8): C10G1/06
Inventor 顾璠王东方王秋颖
Owner SOUTHEAST UNIV