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A hydrogen sulfide selective oxidation removal catalyst and its preparation method and application

A selective, hydrogen sulfide technology, applied in physical/chemical process catalysts, sulfur preparation/purification, chemical instruments and methods, etc., can solve the problems of easy deactivation, large oxygen demand, etc., to improve catalytic activity, high Sulfur selectivity, effect of realizing payload

Active Publication Date: 2021-04-23
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These metal oxide catalysts have deficiencies in the process of use, such as: Fe 2 o 3 The demand for oxygen by the catalyst is too large; vanadium and chromium-based catalysts are non-environmentally friendly oxides; TiO 2 Base catalysts are highly susceptible to deactivation in the presence of water vapor

Method used

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  • A hydrogen sulfide selective oxidation removal catalyst and its preparation method and application
  • A hydrogen sulfide selective oxidation removal catalyst and its preparation method and application
  • A hydrogen sulfide selective oxidation removal catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This preparation example is used to illustrate a hydrogen sulfide selective oxidation removal catalyst provided by the present invention and its preparation method. The catalyst prepared by this embodiment is N-C /

[0026] Put 4 g of carbon precursor glucose, 6 g of citric acid, 1 g of multi-walled carbon nanotubes and 3 g of nitrogen precursor ammonium bicarbonate in a mortar, mix and grind thoroughly at room temperature, and place the obtained black solid powder in an oven at 130 °C After the reaction, the temperature of the obtained solid was raised to 350° C. and kept at the highest temperature for 180 minutes. Finally, under an inert atmosphere, the high-temperature calcination program was raised to 800 °C and kept for 120 min.

[0027] The morphology of the hydrogen sulfide selective oxidation removal catalyst synthesized by the present invention uses a scanning electron microscope

[0028] Observation was carried out, and element content was analyzed by X-ray...

Embodiment 2

[0032] This preparation example is used to illustrate a hydrogen sulfide selective oxidation removal catalyst provided by the present invention and its preparation method. The catalyst prepared by this embodiment is N-C /

[0033] Put 4 g of carbon precursor glucose, 6 g of citric acid, 1 g of multi-walled carbon nanotubes and 3 g of nitrogen precursor ammonium bicarbonate in a mortar, mix and grind thoroughly at room temperature, and place the obtained black solid powder in an oven at 130 °C After the reaction, the temperature of the obtained solid was raised to 400° C. and kept at the highest temperature for 180 minutes. Finally, under an inert atmosphere, the high-temperature calcination program was raised to 800 °C and kept for 120 min.

Embodiment 3

[0035] This preparation example is used to illustrate a hydrogen sulfide selective oxidation removal catalyst provided by the present invention and its preparation method. The catalyst prepared by this embodiment is N-C /

[0036] Put 4 g of carbon precursor glucose, 6 g of citric acid, 1 g of multi-walled carbon nanotubes and 3 g of nitrogen precursor ammonium bicarbonate in a mortar, mix and grind thoroughly at room temperature, and place the obtained black solid powder in an oven at 130 °C After the reaction, the temperature of the obtained solid was raised to 450° C. and kept at the highest temperature for 180 minutes. Finally, under an inert atmosphere, the high-temperature calcination program was raised to 800 °C and kept for 120 min.

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Abstract

The invention provides a sulfur catalyst capable of selectively oxidizing and removing hydrogen sulfide to obtain high added value and a preparation method thereof. The preparation method of the non-metal monolithic carbon-based catalyst comprises the following steps: successively grind the precursor containing carbon source, citric acid, carbon nanotubes, and the precursor containing nitrogen source through mechanical grinding, and then put them into a specific molding machine. The inside of the mold is compacted and placed in an oven at 100-130°C for reaction, then heated to 300-450°C in a tubular roaster in an air atmosphere for roasting, and finally under an inert atmosphere at 600-1200°C Calcined at high temperature. The hydrogen sulfide selective oxidation removal catalyst prepared by the method provided by the invention can obtain higher hydrogen sulfide conversion rate and sulfur selectivity when used in the hydrogen sulfide selective oxidation removal reaction.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a hydrogen sulfide selective oxidation removal catalyst, a preparation method thereof and a method for using the catalyst to catalyze the hydrogen sulfide selective oxidation removal reaction. Background technique [0002] In many industrial processes such as natural gas, biomass gas purification and petroleum distillation 2 S) removal is one of the essential processes. h 2 The existence of S will not only corrode equipment and pipelines, but also poison other industrial catalysts, thereby increasing production costs, even threatening personal safety and causing damage to the environment. When biomass gas is used as fuel, H 2 S will be oxidized to produce SO 2 , leading to acid rain and other negative impacts on the environment. Due to the thermodynamic limitation of the classical Claus equilibrium reaction used in industrial gas, there are still about 3-5...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24C01B17/04C10L3/10B01D53/86B01D53/52
CPCB01D53/8612B01J27/24C01B17/0434C10L3/103
Inventor 刘岳峰李世艳苏党生
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI