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A highly dispersed metal or metal oxide doped adsorbent, preparation method and application thereof

A technology of oxides and adsorbents, applied in carbon monoxide, chemical instruments and methods, adsorption purification/separation, etc., can solve the problems of inability to maximize the effect of active sites, poor adsorption and separation effects, and difficult access to active sites, etc., to achieve The method is simple, the selectivity is high, and the effect of improving the dispersion degree

Active Publication Date: 2022-04-22
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current technology, the active sites of the adsorbents directly prepared from the metal precursor and the carrier are easy to aggregate, which partially blocks the pores of the carrier, and the active sites in the aggregation center are difficult to contact the adsorbate, resulting in the inability to maximize the effect of the active sites. Adsorption separation effect is not good

Method used

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  • A highly dispersed metal or metal oxide doped adsorbent, preparation method and application thereof
  • A highly dispersed metal or metal oxide doped adsorbent, preparation method and application thereof
  • A highly dispersed metal or metal oxide doped adsorbent, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042]According to Table 1, weigh 0.2g carrier and disperse it in 10mL methanol, add metal node precursor and organic ligand, stir at 70°C for 10h, wash and dry, place in a tube furnace and roast at 450°C for 5h to obtain high Dispersed metal or metal oxide doped adsorbent samples 1-1 to 1-6.

Embodiment 2

[0048] According to Table 2, weigh 0.2g carrier and disperse it in 10mL methanol, add metal node precursor and organic ligand, stir at 70°C for 10h, wash and dry, place in a tube furnace and roast at 450°C for 5h to obtain high Dispersed metal or metal oxide doped adsorbent samples 2-1 to 2-4.

[0049] Comparative example: weigh 0.2g SiO 2 Disperse in 10mL methanol, add 0.023g palladium nitrate dihydrate and 0.026g 4,4-bipyridine, stir at 70°C for 10h, wash and dry, place in a tube furnace and roast at 450°C for 5h to prepare silica Comparative sample B as carrier.

[0050] Table 2

[0051]

[0052] Carry out XRD characterization on samples 2-1~2-4 and comparative sample B, the results are as follows figure 2 shown. From figure 2 It can be seen in the comparison sample B that although SiO 2 Palladium-doped adsorbents, but metal diffraction peaks appeared in the XRD characterization, while samples 2-1 to 2-4 did not appear metal diffraction peaks, which indicated tha...

Embodiment 3

[0054] According to Table 3, weigh 0.2g carrier and disperse it in 10mL methanol, add metal node precursor and organic ligand, stir at 70°C for 10h, add 0.2g reducing agent and continue stirring for 1h, wash and dry to obtain highly dispersed metal or Metal oxide doped adsorbent samples 3-1 to 3-4.

[0055] Comparative example: weigh 0.2g SiO 2 Disperse in 10mL methanol, add 0.028g copper nitrate hexahydrate and 0.043g 5-hydroxyisophthalic acid, stir at 70°C for 10h, then add 0.2g reducing agent sodium sulfite and continue stirring for 1h, wash and dry to obtain silica Comparative sample C as carrier.

[0056] table 3

[0057]

[0058]

[0059] Samples 3-1 to 3-4 and comparative sample C were characterized by XRD, the results are as follows image 3 shown. From image 3 It can be seen in the comparison sample C that although SiO 2 Copper-doped adsorbents, but metal diffraction peaks appeared in the XRD characterization, while samples 3-1 to 3-4 did not appear metal...

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Abstract

The invention discloses a highly dispersed metal or metal oxide doped adsorbent, a preparation method and its application. The preparation method comprises using porous metal oxide or a two-dimensional material as a carrier; loading a metal-organic polyhedron on the carrier, A metal-organic polyhedral loaded porous material is obtained; the loaded porous material is reduced or oxidized to obtain a highly dispersed metal or metal oxide doped adsorbent; wherein the metal or metal oxide includes Pd, Rh, Cu, One or more of Zr or Zn and their oxides, the content of the metal or metal oxide is 0.1-6 mmol / g. The present invention uses the metal-organic polyhedron as the active site precursor to prepare a highly dispersed metal or metal oxide doped adsorbent, the method is simple, and due to the limitation of the number of metal nodes in the metal-organic polyhedron, the adsorption capacity of the metal or metal oxide is significantly improved. The degree of dispersion significantly enhances the complexing ability of active sites, thereby significantly improving its adsorption and separation performance.

Description

technical field [0001] The invention belongs to the technical field of adsorption materials, and in particular relates to a highly dispersed metal or metal oxide doped adsorbent, a preparation method and an application thereof. Background technique [0002] Mercaptans, sulfides, sulfur oxides, and thiophene sulfides in fuel oil (gasoline, diesel, kerosene, etc.) generate toxic sulfur oxides with the combustion of fuel oil, pollute the air, and generate acid rain, which is extremely harmful. Therefore Deep desulfurization of fuel oil has become an important and urgent problem to be solved. Olefins and alkanes are important raw materials in chemical production, but at present, the separation of alkenes and alkanes usually adopts low-temperature rectification method with high energy density and large equipment investment. Carbon monoxide is one of the most important raw materials in the chemical industry. However, carbon monoxide raw materials can be obtained from steam reform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/30C10G25/00C01B32/40C07C7/12C07C11/04C07C11/06
CPCB01J20/226B01J20/0237B01J20/0225C10G25/003C01B32/40C07C7/12C07C11/04C07C11/06
Inventor 孙林兵顾梦旋刘晓勤李玉霞
Owner NANJING TECH UNIV
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