Preparation method of catalyst for H2S selective catalytic oxidation

A catalytic oxidation and catalyst technology, which is applied in the preparation/purification of sulfur, chemical instruments and methods, separation methods, etc., can solve the problems of cumbersome preparation process, easy loss of active components, and few catalytic centers, and achieves a simple and easy synthesis method. , the effect of excellent catalytic performance

Inactive Publication Date: 2018-05-04
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, activated carbon and molecular sieve materials have a large specific surface area and rich pores to speed up the mass transfer process and product sulfur desorption rate, but the material itself has few catalytic centers, and it needs to be loaded with active components or modified to have catalytic performance. Therefore, there are problems such as cumbersome preparation process and easy loss of active components in the reaction; metal oxides themselves have catalytic active sites, and their stability is relatively high, but their specific surface area is small, which limits their ability to react with H 2 The adsorption of S, and the active center is easily covered by sulfur in the reaction, which greatly reduces the performance of the catalyst.

Method used

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  • Preparation method of catalyst for H2S selective catalytic oxidation
  • Preparation method of catalyst for H2S selective catalytic oxidation
  • Preparation method of catalyst for H2S selective catalytic oxidation

Examples

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Embodiment 1

[0027]Weigh 0.654g 3-aminophenol, 0.42g HMTA (hexamethylenetetramine), dissolve it in 75ml deionized water, and wait until completely dissolved to form a clear solution A; weigh 0.47g F127 template and dissolve it in 5ml deionized water , to be completely dissolved to form a clear solution B; then slowly add solution A to solution B during stirring to form a mixed solution C, and then stir the mixed solution C in an oil bath at 50°C for 16 hours, and after 16 hours, the mixture Transfer to a clean polytetrafluoroethylene-lined kettle and place it in an oven at 95°C for 12 hours. When it cools down to room temperature naturally, take out the reaction kettle, filter, wash, and dry to collect samples. The samples collected in the previous step were placed in a porcelain ark and placed in a tube furnace for pre-oxidation in an air atmosphere at 250 °C for 2 h with a heating rate of 1 °C / min. Put the pre-oxidized sample into a tube furnace with a nitrogen atmosphere, first roast it...

Embodiment 2

[0029] Weigh 3.27g of 3-aminophenol, 2.2g of HMTA (hexamethylenetetramine), dissolve in 375ml of deionized water, until completely dissolved to form a clear solution A; weigh 2.35g of F127 template and dissolve in 25ml of deionized water , to be completely dissolved to form a clear solution B; then slowly add solution A to solution B during stirring to form a mixed solution C, and then stir the mixed solution C in an oil bath at 50°C for 16 hours, and after 16 hours, the mixture Transfer to a clean polytetrafluoroethylene-lined kettle, and keep it in an oven at 95°C for 12 hours. When it is naturally cooled to room temperature, take out the reaction kettle, filter, wash, and dry to collect samples. The samples collected in the previous step were placed in a porcelain ark and placed in a tube furnace for pre-oxidation in an air atmosphere at 250°C for 2 hours with a heating rate of 1°C / min. Put the pre-oxidized sample into a tube furnace with a nitrogen atmosphere, first roast ...

Embodiment 3

[0030] Embodiment 3 (best embodiment):

[0031] Weigh 0.654g 3-aminophenol, 0.42g HMTA (hexamethylenetetramine), dissolve it in 75ml deionized water, and wait until completely dissolved to form a clear solution A; weigh 0.47g F127 template and dissolve it in 5ml deionized water , to be completely dissolved to form a clear solution B; then slowly add solution A to solution B during stirring to form a mixed solution C, and then stir the mixed solution C in an oil bath at 50°C for 16 hours, and after 16 hours, the mixture Transfer to a clean polytetrafluoroethylene-lined kettle, and react in a constant temperature oven at 95°C for 12 hours. When it is naturally cooled to room temperature, take out the reactor, filter, wash, and dry to collect samples. The samples collected in the previous step were placed in a porcelain ark and placed in a tube furnace for pre-oxidation in an air atmosphere at 250 °C for 2 h with a heating rate of 1 °C / min. Put the pre-oxidized sample into a tub...

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Abstract

The invention discloses a preparation method of a catalyst for H2S selective catalytic oxidation. The catalyst is prepared by the following steps: taking F217 as the template and 3-aminophenol and hexamethylene tetramine as the precursors, carrying out rapid carbonization in a nitrogen atmosphere, and finally performing KOH etching. The prepared catalyst has the advantages of large specific surface area and high N-doping amount. The prepared sample can be use as a catalyst applied to H2S selective catalytic oxidation. Compared with a common H2S selective catalyst, the prepared catalyst has a strong H2S selective catalytic performance.

Description

technical field [0001] The present invention relates to the preparation of a kind of N-doped porous nano-carbon material, in particular to a kind of H 2 Preparation of S selective oxidation catalyst and method of use thereof, this application can not only eliminate highly toxic H 2 S gas can also realize the recovery and utilization of sulfur element. Background technique [0002] h 2 As one of the main pollutants in the atmosphere, S is a highly irritating and highly toxic gas. Under aerobic and humid heat conditions, it will not only cause equipment and pipeline corrosion, catalyst poisoning, but also seriously threaten personal safety. With the development of the economy and the enhancement of people's awareness of environmental protection, the desulfurization of tail gas has attracted more and more attention. At the same time, the country has also formulated corresponding laws and regulations, and the H 2 S emissions are strictly limited. Hydrogen sulfide is a by-pr...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01D53/86B01D53/52C01B17/04
CPCB01J27/24B01D53/8612B01D2255/70B01D2257/304C01B17/0426
Inventor 刘福建陈孝平沈丽娟曹彦宁江莉龙
Owner FUZHOU UNIV
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