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Plasma device and method for decomposing hydrogen sulfide

A plasma and hydrogen sulfide technology, applied in the field of plasma chemistry, can solve the problems of low hydrogen sulfide conversion rate and high energy consumption for decomposition

Pending Publication Date: 2020-07-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the defects of low hydrogen sulfide conversion rate and high decomposition energy consumption in the low temperature plasma reaction equipment provided by the prior art when it is used for the decomposition of hydrogen sulfide, and provide a new method that can improve the conversion rate of hydrogen sulfide And low-temperature plasma reaction equipment for reducing decomposition energy consumption and a method for decomposing hydrogen sulfide using the reaction equipment

Method used

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  • Plasma device and method for decomposing hydrogen sulfide

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Effect test

Embodiment 1

[0107] use figure 1 The shown low-temperature plasma reaction equipment performs hydrogen sulfide decomposition reaction. The specific structure and structural parameters of the low-temperature plasma reaction equipment are as follows. The internal electrode of this embodiment is a high-voltage electrode:

[0108] Reaction equipment includes:

[0109] A first cavity, the first cavity is respectively provided with a first inlet, a gas product outlet and a liquid product outlet, wherein all the side walls of the first cavity are formed by a barrier medium, forming the barrier medium The material is hard glass;

[0110] a second cavity, the second cavity is nested inside the first cavity, and the second cavity is respectively provided with a second inlet and a second outlet;

[0111] an internal electrode, the internal electrode forms the side wall of the second cavity, the material forming the internal electrode is stainless steel, and the internal electrode is connected to a ...

Embodiment 2

[0138] The present embodiment adopts the plasma reaction equipment similar to embodiment 1 to carry out the decomposition reaction of hydrogen sulfide, the difference is, in the present embodiment:

[0139] The side wall of the first cavity is used as an external electrode, and the external electrode is connected to a high-voltage power supply, so that the side wall of the first cavity is used as a high-voltage electrode, and the material forming the external electrode is stainless steel metal foil; and the second The side walls of the second cavity are grounded as internal electrodes, so that the side walls of the second cavity are used as ground electrodes.

[0140] The barrier medium is arranged around the inner wall of the first cavity;

[0141] L 2 with the thickness of the barrier dielectric D 1 ratio of 6:1; and H 1 :L 3 =1:46.

[0142] In this embodiment, H is introduced into the first cavity of the low-temperature plasma reaction equipment from the first inlet. ...

Embodiment 3

[0146] The present embodiment adopts the plasma reaction equipment similar to embodiment 1 to carry out the decomposition reaction of hydrogen sulfide, the difference is, in the present embodiment:

[0147] All side walls of the first cavity are formed by external electrodes, the material forming the external electrodes is copper foil, the external electrodes are grounded, and the internal electrodes are connected to a high-voltage power supply;

[0148] The barrier medium is arranged around the inner wall of the first cavity;

[0149] L 2 with the thickness of the barrier dielectric D 1 The ratio of 0.5:1; and H 1 :L 3 =1:200.

[0150] In this embodiment, H is introduced into the first cavity of the low-temperature plasma reaction equipment from the first inlet. 2 S / Ar mixed gas, where H 2 The volume fraction of S is 25%, the flow rate of the mixed gas is controlled so that the average residence time of the gas in the discharge area is 3.4s, and the reaction pressure in...

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Abstract

The invention relates to the field of plasma chemistry, and discloses a plasma device and a method for decomposing hydrogen sulfide; the device comprises a first cavity (1), a second cavity (2), an inner electrode (3), an outer electrode (4) and a blocking medium (6), wherein the inner electrode (3) and the outer electrode (4) are both solid electrodes, and the shapes of the inner electrode (3) and the outer electrode (4) are mutually matched to form an equal-diameter structure. The low-temperature plasma reactor provided by the invention can realize continuous and stable operation of a hydrogen sulfide decomposition process under an obviously high hydrogen sulfide conversion rate, and the device can realize long-period operation.

Description

technical field [0001] The invention relates to the field of plasma chemistry, in particular to a plasma device and a method for decomposing hydrogen sulfide. Background technique [0002] Hydrogen sulfide (H 2 S) is a highly toxic and foul-smelling acid gas, which not only causes corrosion of metals and other materials, but also endangers human health and pollutes the environment. At present, large and medium-sized refineries in my country adopt the traditional Claus method (Claus) to treat 2 S tail gas, and recover sulfur. The method recovers only the sulfur in hydrogen sulfide, but converts the valuable hydrogen into water. From the perspective of comprehensive utilization of resources, hydrogen resources have not been effectively utilized in the traditional hydrogen sulfide recovery process. [0003] Therefore, the decomposition of hydrogen sulfide into sulfur and hydrogen has gradually become a technical field that researchers at home and abroad pay close attention ...

Claims

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Application Information

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IPC IPC(8): C01B17/04C01B3/04
CPCC01B3/04C01B17/0495Y02E60/36
Inventor 张婧王林张铁任君朋徐伟石宁孙峰李亚辉周明川
Owner CHINA PETROLEUM & CHEM CORP
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