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Low temperature plasma device and method of decomposing hydrogen sulfide

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

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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  • Low temperature plasma device and method of decomposing hydrogen sulfide

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Effect test

Embodiment 1

[0112] 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:

[0113] Reaction equipment includes:

[0114] A first cavity, the first cavity is respectively provided with a first inlet, a gas product outlet, and a liquid product outlet, wherein all side walls of the first cavity are formed of a barrier medium to form the barrier medium The material is hard glass;

[0115] A second cavity, the second cavity is nested inside the first cavity, and a second inlet and a second outlet are respectively provided on the second cavity; the side walls of the second cavity are both It is formed by an internal electrode, the material for forming the internal electrode is stainless steel, and the internal electrode is connected to a high voltage power su...

Embodiment 2

[0143] In this embodiment, a plasma reaction equipment similar to that in embodiment 1 is used to carry out the decomposition reaction of hydrogen sulfide. The difference is that in this embodiment:

[0144] All side walls of the first cavity are formed by external electrodes, the material for forming the external electrodes is stainless steel metal foil, the external electrodes are connected to a high-voltage power supply, and the internal electrodes are grounded;

[0145] The blocking medium is arranged around the inner side wall of the first cavity;

[0146] L 2 And the thickness of the blocking medium D 1 The ratio of is 8:1; and H 1 : L 3 = 1:50.

[0147] In this embodiment, H is introduced into the first cavity of the low-temperature plasma reaction equipment from the first inlet 2 S / Ar mixture, where H 2 The volume fraction of S is 30%, and the flow rate of the mixed gas is controlled so that the average residence time of the gas in the discharge zone is 9.4 s. In this embodimen...

Embodiment 3

[0151] In this embodiment, a plasma reaction equipment similar to that in embodiment 1 is used to carry out the decomposition reaction of hydrogen sulfide. The difference is that in this embodiment:

[0152] All the side walls of the first cavity are formed by external electrodes, the material for forming the external electrodes is copper foil, the external electrodes are grounded, and the internal electrodes are connected to a high-voltage power supply;

[0153] The blocking medium is arranged around the inner side wall of the first cavity;

[0154] L 2 And the thickness of the blocking medium D 1 The ratio of is 20:1; and H 1 : L 3 =1:120.

[0155] In this embodiment, H is introduced into the first cavity of the low-temperature plasma reaction equipment from the first inlet 2 S / Ar mixture, 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 zone is 17.6s, and the reaction pressure in th...

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Abstract

The invention relates to the field of plasma chemistry, and discloses a low temperature plasma device and a method of decomposing hydrogen sulfide, the device comprising: a first cavity (1), a secondcavity (2), a third cavity (7), an inner electrode (3), an outer electrode (4), and a barrier medium (6), wherein the inner electrode (3) and the outer electrode (4) being both solid electrodes and the shapes of which cooperate with each other to form an isodiametric structure. The low-temperature plasma reaction device 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 low-temperature plasma equipment 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 harms human health and pollutes the environment. At present, the large and medium-sized oil refineries in my country adopt the traditional Claus method (Claus) to treat H-containing 2 S tail gas, and recover sulfur. This method only recovers the sulfur in hydrogen sulfide, but converts precious hydrogen into water. From the perspective of comprehensive utilization of resources, in the traditional hydrogen sulfide recovery process, hydrogen resources have not been effectively used. [0003] Therefore, the decomposition of hydrogen sulfide into sulfur and hydrogen has gradually become a technical field that domestic and foreign researche...

Claims

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Application Information

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IPC IPC(8): C01B17/04C01B3/04
CPCC01B3/04C01B17/0495C01B2203/0266Y02E60/36
Inventor 张婧任君朋王林徐伟石宁张铁朱云峰孙峰李亚辉
Owner CHINA PETROLEUM & CHEM CORP
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