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Chromium-based MOF adsorbent for H2S gas removal and preparation method of chromium-based MOF adsorbent

An adsorbent and gas technology, applied in the field of chromium-based MOF adsorbent and its preparation, can solve problems such as discount of adsorption efficiency, and achieve the effects of improved adsorption capacity, low device requirements and low production cost

Pending Publication Date: 2021-09-21
NO 719 RES INST CHINA SHIPBUILDING IND
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Problems solved by technology

[0004] The present invention aims to provide a method for H 2 Chromium-based MOF adsorbent for S gas removal and its preparation method to solve the technical problem that the adsorption efficiency of existing MOF materials will be greatly reduced after repeated use

Method used

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  • Chromium-based MOF adsorbent for H2S gas removal and preparation method of chromium-based MOF adsorbent
  • Chromium-based MOF adsorbent for H2S gas removal and preparation method of chromium-based MOF adsorbent

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Embodiment 1

[0026] This embodiment provides a kind of preparation method of chromium-based MOF adsorbent, comprising the following steps:

[0027] a) Add Cr(NO 3 ) 3 9H 2 O (2 g, 0.005 mmol) and 2-aminophthalic acid (0.9 g, 0.005 mmol) were sonicated for 10 min so that the solution was well mixed.

[0028] b) The solution was transferred to a Teflon-lined autoclave and heated to 200°C for 24h.

[0029] c) After heating, the solution was naturally cooled to room temperature, and a light green solid was obtained by suction filtration.

[0030] d) Put the solid into 300mL N,N-dimethylformamide (DMF), heat to 100°C, stir for 24h, and remove the residual reactants.

[0031] e) Then put the above suspension into 400mL ethanol and stir at room temperature for 18h to remove the DMF in the pores. The final green product was vacuum filtered and dried at 200°C for 12 hours to obtain a chromium-based MOF adsorbent named MIL-101, whose structure and morphology are as follows: figure 1 .

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Abstract

The invention discloses a chromium-based MOF adsorbent for H2S gas removal and a preparation method of the chromium-based MOF adsorbent, and relates to the field of catalyst design. The adsorbent is prepared by taking chromic nitrate and 2-aminobenzene dicarboxylic acid as reaction raw materials and water as a solvent through reaction at the temperature of 200 DEG C. The chromium-based MOF adsorbent MIL-101 is synthesized by adopting the 2-aminobenzene dicarboxylic acid as a ligand, the adsorption stability is greatly improved, and the adsorption effect is still efficient after repeated use; the MIL-101 adsorbent is stable in structure, free of irreversible structural transformation, stable in pore structure and high in plasticity; and after the amino group is grafted, the H2S adsorption capacity is obviously improved.

Description

technical field [0001] The present invention relates to the field of catalyst design, in particular to a 2 Chromium-based MOF adsorbent for S gas removal and its preparation method. Background technique [0002] h 2 S is an air pollutant, it has a strong pungent odor of harmful gas, people will feel sick if inhaled too much, and even lead to olfactory paralysis; H in the air 2 If the S content is too high, it will also cause serious pollution consequences such as acid rain. Therefore, removal of H during domestic air purification 2 S odor and reduction of H in industry 2 S emissions are very necessary. [0003] How to efficiently remove H 2 S, has always been one of the hot spots of air purification research. Most nanoporous zeolite molecular sieves can effectively capture H 2 S gas, but regeneration requires high energy consumption. Metal oxide removal of H 2 The difficulty of S lies in its irreversible structural transformation, which makes it difficult to regene...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCB01J20/226B01D53/02B01D2253/204B01D2257/304B01J2220/4812B01J2220/4806
Inventor 方芳王骁李毅舟邹雨静
Owner NO 719 RES INST CHINA SHIPBUILDING IND
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