Method for coupled decomposition of hydrogen sulfide through photocatalytic/electrocatalytic-chemical ring reaction

A hydrogen sulfide and electrocatalysis technology, applied in the electrolysis process, electrolysis components, electrodes, etc., can solve problems such as pollution, and achieve the effect of reducing costs, flexible selection, and strong adaptability

Active Publication Date: 2015-11-04
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the problem of high-value hydrogen sulfide resources, and provides a method and device for decomposing hydrogen sulfide coupled with light, electrocatalysis-chemical ring reaction, which not only solves the problem of environmental pollution, but also makes hydrogen sulfide high-value, A technology that turns waste into treasure

Method used

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  • Method for coupled decomposition of hydrogen sulfide through photocatalytic/electrocatalytic-chemical ring reaction

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Embodiment 1

[0021] From left to right are cathode chamber, hydrogen sulfide chamber and anode chamber (see figure 1 ). The cathode chamber and the hydrogen sulfide chamber are separated by a nafion membrane, and the hydrogen sulfide chamber and the anode chamber are separated by a Celgard membrane. Add 0.2mol / L of K in the cathode chamber 2 SO 4 aqueous solution. Add KSCN and K in the anode chamber and hydrogen sulfide chamber 2 SO 4 0.2mol / L and 0.25mol / L aqueous solutions respectively. Loaded MoS with a size of 2 cm × 2 cm 2 The P-type semiconductor CdSe is placed in the cathode chamber, and the FTO with a size of 2cm×2cm is placed in the anode chamber as the anode, and the external constant voltage source is connected to the cathode and anode through wires, and the ammeter is connected in series to the circuit. The light source used in this reaction is a 300W xenon lamp, the constant voltage source applies a DC voltage of 0.4V, the gas flow rate of hydrogen sulfide is 1.0ml / min,...

Embodiment 2

[0022] Embodiment two: the difference with embodiment one is:

[0023] Add K in the anode chamber and hydrogen sulfide chamber 4 Fe(CN) 6 and K 2 SO 4 0.2mol / L and 0.25mol / L aqueous solutions respectively. The hydrogen sulfide conversion rate was 80%.

Embodiment 3

[0024] Embodiment three: the difference with embodiment one is:

[0025] Add Ce(NO 3 ) 3 and K 2 SO 4 0.2mol / L and 0.25mol / L aqueous solutions respectively. The conversion of hydrogen sulfide was 75%.

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Abstract

The invention discloses a method for the coupled decomposition of hydrogen sulfide through a photocatalytic/electrocatalytic-chemical ring reaction, which relates to a hydrogen sulfide conversion method and a hydrogen sulfide conversion device. The hydrogen sulfide conversion method disclosed by the invention is implemented in two steps, and used for decomposing hydrogen sulfide into elements sulfur and hydrogen. In the first step, protons are subjected to photoelectrocatalytic or electrocatalytic reduction so as to produce hydrogen, and an oxidation-state redox couple is obtained on an anode; and in the second step, the redox couple is reacted with hydrogen sulfide so as to obtain an element sulfur and hydrogen ions, the hydrogen ions are transferred to a cathode to participate in the first step, and the element sulfur can be separated and recycled. The approach provided by the invention can be used for decomposing hydrogen sulfide.

Description

technical field [0001] The invention relates to a method and a device for converting hydrogen sulfide. Background technique [0002] As a harmful gas, hydrogen sulfide exists in large quantities in coal bed methane, shale gas and natural gas, and is also a large by-product in petroleum refining, natural gas processing and other chemical synthesis processes. At present, the industry mainly uses Clauss to solve the problem of hydrogen sulfide. [0003] h 2 S+3 / 2O 2 → SO 2 +H 2 O (1) [0004] 2H 2 S+SO 2 →2H 2 O+3 / xS x (2) [0005] The traditional Claus process can partially oxidize hydrogen sulfide to form water and sulfur, recover sulfur in hydrogen sulfide, and hydrogen is oxidized into water to generate waste. Contents of the invention [0006] The present invention aims to solve the problem of high-value hydrogen sulfide resources, and provides a method and device for decomposing hydrogen sulfide coupled with light, electrocatalysis-chemical ring reaction, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/02C25B1/00C25B11/06
Inventor 李灿韩晶峰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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