Preparation method and application of nanofiber loaded heteropolyacid salt catalyst

A technology for supporting heteropolyacids and nanofibers, which is applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc. To achieve the effect of mild conditions, improved desulfurization efficiency, and increased specific surface area

Pending Publication Date: 2022-01-07
HAINAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a new type of catalytic material, heteropolyacids have the advantages of simple composition, definite structure, and easy adjustment of components. They have attracted extensive attention from researchers in the field of catalysis. There is still a large distance, and there are problems such as the catalyst is easily soluble in the ionic liquid phase, which is difficult to recycle or has certain toxicity and high cost.

Method used

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  • Preparation method and application of nanofiber loaded heteropolyacid salt catalyst
  • Preparation method and application of nanofiber loaded heteropolyacid salt catalyst
  • Preparation method and application of nanofiber loaded heteropolyacid salt catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Preparation of PMoV-1 catalyst:

[0029] 14.4g MoO 3 with 1.8188g V 2 o 5 Mixed, added to 250mL deionized water, condensed and refluxed, heated to 100°C and stirred continuously, 1.15g of 85wt% phosphoric acid was added dropwise to it, stirred at 100°C for 24h, and then dried at 70°C to obtain H 5 PMo 10 V 2 o 40 catalyst.

[0030] Mix 1g PAN, 0.5g melamine and 9g DMF, stir for 2h, the temperature is 90℃; 0.1g prepared H 5 PMo 10 V 2 o 40 The catalyst was dissolved in the above solution, stirred at room temperature for 2 hours, and spun at 19kV and 30°C. The distance between the jet apex and the receiving plate was 20cm to obtain nanofibers, and the spun nanofibers were calcined in oxygen (250°C ) for 3h, and then calcined (800°C) for 2h in argon to finally obtain the nanofiber-supported heteropolyacid salt catalyst H 5 PMo 10 V 2 o 40 / NFs, denoted as PMoV-1.

[0031] figure 1 It is a scanning electron microscope image (SEM). The fiber diameter in pictu...

Embodiment 2

[0033] 14.4g MoO 3 with 1.8188g V 2 o 5 Mixed, added to 250mL deionized water, condensed and refluxed, heated to 100°C and stirred continuously, 1.15g of 85wt% phosphoric acid was added dropwise to it, stirred at 100°C for 24h, and then dried at 70°C to obtain H 5 PMo 10 V 2 o 40 catalyst.

[0034] Mix 1g PAN, 1g melamine and 9g DMF, stir for 2h, the temperature is 90℃; 0.3g prepared H 5 PMo 10 V 2 o 40 The catalyst was dissolved in the above solution, stirred at room temperature for 2 hours, and spun at 19kV and 30°C. The distance between the apex of the jet and the receiving plate was 20cm to obtain nanofibers, and the spun nanofibers were placed in oxygen (250°C ) calcined for 3 hours, and then passed into argon (800° C.) for calcination for 2 hours to finally obtain the nanofiber-supported catalyst H 5PMo 10 V 2 o 40 / NFs, denoted as PMoV-2.

Embodiment 3

[0036] Preparation of PMoV-3 catalyst:

[0037] 14.4g MoO 3 with 1.8188g V 2 o 5 Mixed, added to 250mL deionized water, condensed and refluxed, heated to 100°C and kept stirring, 1.15g of 85wt% phosphoric acid was added dropwise to it, stirred at 100°C for 24h, and then dried at 60-75°C to obtain H 5 PMo 10 V 2 o 40 catalyst.

[0038] Mix 1gPAN, 1.5g melamine and 9gDMF, stir for 2h, the temperature is 90℃; 0.5g prepared H 5 PMo 10 V 2 o 40 The catalyst was dissolved in the above solution, stirred at room temperature for 2 hours, and spun at 19kV and 30°C. The distance between the apex of the jet and the receiving plate was 20cm to obtain nanofibers. The spun nanofibers were placed in oxygen (250°C) Calcined for 3 hours, then passed into argon (800°C) and calcined for 2 hours to finally obtain the catalyst H 5 PMo 10 V 2 o 40 / NFs, denoted as PMoV-3.

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Abstract

The invention belongs to the crossing field of environmental protection technology and oil chemical deep processing industry, and particularly relates to a preparation method and application of a nanofiber loaded heteropolyacid salt catalyst. The preparation method comprises the following steps: mixing MoO3 and V2O5, adding into deionized water, carrying out condensing reflux heating to 100 DEG C, continuously stirring, adding phosphoric acid, stirring, and drying to obtain an H5PMo10V2O40 catalyst; carrying out electrostatic spinning by taking a mixed solution of polyacrylonitrile and melamine as a carrier to obtain nanofibers; and calcining in oxygen, introducing argon, and calcining for 2 hours to obtain the nanofiber loaded heteropolyacid salt catalyst. The catalyst is used for catalytic oxidation desulfurization, and has obviously improved desulfurization benefit.

Description

technical field [0001] The invention belongs to the interdisciplinary field of petrochemical oil product deep processing industry and environmental protection technology, and in particular relates to a preparation method and application of a nanofiber-loaded heteropolysalt catalyst. Background technique [0002] Exhaust emissions from oil-powered locomotives are likely to cause environmental problems and health hazards. Sulfur compounds present in oils are mainly divided into two categories: heterocyclic and non-heterocyclic sulfur compounds. Heterocyclic sulfides mainly include thiophene, benzothiophene, dibenzothiophene and their alkyl-substituted derivatives, and non-heterocyclic sulfides mainly include mercaptan sulfides and disulfides; More than 85%, benzothiophene dibenzothiophene and their derivatives account for more than 70% of thiophene sulfides. [0003] The sulfur atoms of non-heterocyclic sulfides have high electron density and weak carbon-sulfur bonds, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/06B01J31/18C10G53/14
CPCB01J31/06B01J27/19C10G53/14C10G2300/202
Inventor 朱林华任卓一董文龙史载锋杨婷婷陈梦婷吴雨声陈兰戴春燕
Owner HAINAN NORMAL UNIV
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