Low-temperature plasma methane activation and oil shale pyrolysis coupling method and device

A low-temperature plasma and oil shale technology, applied in the energy field, can solve problems such as lack of coupling effect, poor coupling effect, complex reaction process, etc., and achieve improved conversion rate, increased electron density, and increased probability of collision Effect

Active Publication Date: 2021-02-05
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although methane dry reforming has obvious economic and environmental benefits, methane dry reforming requires high temperature and high pressure reaction conditions, and its optimum temperature range is higher than that of oil shale pyrolysis reaction. The coupling effect is not good, resulting in complex reaction process and less than optimal coupling effect
[0004] At present, there is no good method to improve the yield and quality of oil shale pyrolysis products

Method used

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  • Low-temperature plasma methane activation and oil shale pyrolysis coupling method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] A low-temperature plasma methane activation and oil shale pyrolysis coupling device, such as figure 1 As shown, including quartz tube reactor 3, high voltage electrode 1 (stainless steel tube) and external electrode 7 (stainless steel mesh);

[0064] Silica gel plugs 2 are respectively provided at both ends of the quartz tube reactor 3 to ensure the tightness of the device;

[0065] An annular discharge gap, a raw material area 9 and a refining area are arranged in the quartz tube reactor 3;

[0066] The lower sides of both ends of the quartz tube reactor 3 are also equipped with a gas inlet 4 and a gas outlet 10 respectively, and the methane-rich mixed gas and carbon dioxide gas enter the quartz tube reactor 3 from the gas inlet 4 to ensure that the methane-rich mixed gas and carbon dioxide gas are in the quartz tube reactor 3. Helical flow in tube reactor 3;

[0067] The high-voltage electrode 1 stainless steel tube is inserted into the quartz tube reactor 3 through...

Embodiment 2

[0073] A low-temperature plasma methane activation and oil shale thermal decoupling device, which is basically the same as in Example 1, the only difference is that: the quartz tube reactor 3 does not have a refining zone and quartz wool on both sides; and the raw material The other side of the zone 9 is a gas outlet 10, and the two are separated by quartz wool 8.2.

Embodiment 3

[0075] A method for low-temperature plasma methane activation and oil shale thermal decoupling is carried out using the device in Example 2, and the quartz tube reactor adopts a tubular structure, and quartz is used to make a tubular barrier medium (outer diameter 25mm, tube wall 5mm), the grounding electrode is a stainless steel mesh (30mm in length), the high voltage electrode is a stainless steel rod (8mm in diameter), the pole spacing is 6mm, and the length of the low temperature plasma tubular reactor is 260mm;

[0076] The specific steps of the method for coupling low-temperature plasma methane activation and oil shale pyrolysis are as follows:

[0077] Raw material preparation: Catalyst I (Ni / Al 2 o3 , wherein Ni load is 9%) 0.6g, Liushuhe oil shale 3.0g;

[0078] (1) first willow river oil shale is packed in the raw material area of ​​quartz tube reactor, and catalyst 1 is placed in the annular discharge gap of quartz tube reactor;

[0079] (2) Connect gas system and...

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Abstract

The invention relates to a low-temperature plasma methane activation and oil shale pyrolysis coupling method and device, and the method comprises the steps: employing a dielectric barrier discharge low-temperature plasma methane activation reaction to provide a hydrogen source for the pyrolysis reaction of oil shale for pyrolysis, enabling the hydrogen source to comprise hydrogen and hydrogen-richfree radicals (.H, .OH, .CH3, .CH2 and .CH), when the method is used for pyrolyzing the oil shale, the yield and the quality of the shale oil can be improved. The device comprises a quartz tube reactor, a high-voltage electrode and an outer electrode, an annular discharge gap and a raw material area are arranged in the quartz tube reactor, the quartz tube reactor is integrally placed in a heatingfurnace, the device not only can catalyze the methane low-temperature plasma activation reaction process, but also can catalyze the oil shale pyrolysis reaction process, can also perform hydrofiningon products generated by oil shale pyrolysis, can be flexibly changed according to requirements, and has higher universality.

Description

technical field [0001] The invention belongs to the field of energy technology, and relates to a method and a device for coupling low-temperature plasma methane activation and oil shale pyrolysis. Background technique [0002] Oil shale pyrolysis can produce oil with a high hydrogen / carbon atomic ratio and other widely used products, but the conversion rate of organic carbon in oil shale is low, the yield of shale oil is not high, and it contains more unsaturated hydrocarbons and Nitrogen, sulfur, oxygen and other non-hydrocarbon compounds. In the pyrolysis of oil shale, organic carbon generally has three destinations: oil, gas and residual semi-coke. By inhibiting the cracking reaction of organic matter into gas-phase volatiles and polycondensation reaction to form solid semi-coke, the yield of liquid-phase products can be improved. The organic matter in oil shale is a complex polymer compound, and there are various bonds such as methine bonds, acid bonds, and aromatic ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00
CPCC10G1/00
Inventor 石聪王莎邓胜祥陈斌沈骏叶筱葛翔
Owner SHANGHAI UNIV OF ENG SCI
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