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A kind of high-efficiency hydrogen sulfide selective oxidation catalyst and preparation method thereof

A catalyst and selective technology, applied in physical/chemical process catalysts, chemical instruments and methods, separation methods, etc., can solve the problems of easy "poisoning, complicated preparation process, low utilization rate, etc., and achieve high desulfurization efficiency and simple synthesis , high stability effect

Active Publication Date: 2022-08-02
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has a unique carbon-coated metal particle structure, which overcomes the problems of complex preparation process, agglomeration, low utilization rate and easy "poisoning" of traditional carbon-based catalysts, and has the advantages of high conversion efficiency and high stability.

Method used

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  • A kind of high-efficiency hydrogen sulfide selective oxidation catalyst and preparation method thereof
  • A kind of high-efficiency hydrogen sulfide selective oxidation catalyst and preparation method thereof
  • A kind of high-efficiency hydrogen sulfide selective oxidation catalyst and preparation method thereof

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Effect test

Embodiment 1

[0028] The invention provides a preparation method of an efficient hydrogen sulfide selective oxidation catalyst, which specifically comprises the following steps:

[0029] 1) Weigh a certain mass of carbon nitride precursor and place it in an alumina crucible, place the crucible in a muffle furnace, and set a heating program, at a heating rate of 10 ℃ / min, raise it to 550 ℃ and keep it for 30 minutes, wait for The temperature of the furnace is naturally lowered to room temperature, and the graphite phase carbon nitride (yellow solid) is taken out;

[0030] 2) Weigh 100mg ferric nitrate, 300mg glucose and 100mg graphitic carbon nitride obtained in 1), and the three are mixed and ground for 30min to obtain mixed powder;

[0031] 3) Put the mixed powder in 2) in a tube furnace, extract the vacuum, and then feed nitrogen, repeat this operation three times, set a temperature rise program, raise the temperature to 600°C at a heating rate of 10°C / min, and keep the temperature for 30...

Embodiment 2

[0035] 1) Weigh a certain mass of carbon nitride precursor and place it in an alumina crucible, place the crucible in a muffle furnace, and set a heating program, at a heating rate of 10 ℃ / min, raise it to 550 ℃ and keep it for 30 minutes, wait for The temperature of the furnace is naturally lowered to room temperature, and the graphite phase carbon nitride (yellow solid) is taken out;

[0036] 2) Weigh 200mg of cobalt nitrate, 300mg of glucose and 100mg of the graphitic carbon nitride obtained in 1), and the three are mixed and ground for 30min to obtain mixed powder;

[0037] 3) Put the mixed powder in 2) in a tube furnace, extract the vacuum, and then feed nitrogen, repeat this operation three times, set a temperature rise program, raise the temperature to 600°C at a heating rate of 10°C / min, and keep the temperature for 30min. The temperature was lowered to room temperature, and the product was ground to prepare a carbon-coated cobalt nanoparticle catalyst.

[0038] In a ...

Embodiment 3

[0041] 1) Weigh a certain mass of carbon nitride precursor and place it in an alumina crucible, place the crucible in a muffle furnace, and set a heating program, at a heating rate of 10 ℃ / min, raise it to 550 ℃ and keep it for 30 minutes, wait for The temperature of the furnace is naturally lowered to room temperature, and the graphite phase carbon nitride (yellow solid) is taken out;

[0042] 2) Weigh 500mg of cobalt nitrate, 300mg of glucose and 100mg of the graphitic carbon nitride obtained in 1), and the three are mixed and ground for 30min to obtain mixed powder;

[0043] 3) Put the mixed powder in 2) in a tube furnace, extract the vacuum, and then feed nitrogen, repeat this operation three times, set a temperature rise program, raise the temperature to 600°C at a heating rate of 10°C / min, and keep the temperature for 30min. The temperature was lowered to room temperature, and the product was ground to prepare a carbon-coated cobalt nanoparticle catalyst.

[0044] In a ...

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Abstract

A preparation method of a hydrogen sulfide selective oxidation catalyst. The method includes the following steps: mixing and grinding graphitic carbon nitride, metal (cobalt, iron, etc.) salt and sugar, and then annealing in an inert atmosphere to prepare a carbon-coated cobalt nanoparticle catalyst. The catalyst prepared by the invention does not need any pretreatment, the synthesis process is simple, the production period is short, and the enlarged production can be realized. In the present invention, carbon-coated metal particle catalyst is used for the selective oxidation of hydrogen sulfide for the first time. The catalyst has a large specific surface area, can reach 100% hydrogen sulfide conversion rate at a low temperature and can last for 28 hours, has high stability and has a remarkable effect.

Description

technical field [0001] The invention relates to a preparation method of a high-efficiency hydrogen sulfide selective oxidation catalyst, and belongs to the technical field of catalyst synthesis. Background technique [0002] With the continuous improvement of the industrial level, the national economy has been improved and a series of environmental pollution problems have been caused. while hydrogen sulfide (H 2 S) usually comes from different industrial processes and is a very toxic gas, which is not only toxic to human body, but also can cause environmental damage. There is an urgent need to develop corresponding technologies to solve this problem. [0003] At present, there are mainly three types of hydrogen sulfide removal technologies, including low-temperature Claus reaction process, reduction absorption and hydrogen sulfide selective oxidation. Among them, hydrogen sulfide selective catalysts are mainly metal oxide-based catalysts (metal oxides, supported oxides) e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/24B01D53/86B01D53/52
CPCB01J27/24B01D53/8612
Inventor 雷永鹏刘毅周科朝张斗
Owner CENT SOUTH UNIV
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