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Fibrous nano-porous catalyst, preparation method thereof and application

A nanoporous and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve low contact efficiency, pressure drop and difficult separation of catalysts, etc. problems, achieve the effects of reducing emissions, simple preparation process, and significant social and economic benefits

Inactive Publication Date: 2014-06-25
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the materials prepared by the above methods mainly exist in the state of nano-powder, and there are many disadvantages in the use of powder catalysts, such as pressure drop and heat transfer problems, as well as low contact efficiency and difficult separation of catalysts.

Method used

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  • Fibrous nano-porous catalyst, preparation method thereof and application
  • Fibrous nano-porous catalyst, preparation method thereof and application
  • Fibrous nano-porous catalyst, preparation method thereof and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] SiO 2 Synthesis of carbon nanofiber templates on fibers

[0038] 1) First prepare NiO / SiO by impregnation method 2 Fiber monolithic catalyst: 0.2g SiO 2 The fibers were impregnated in 0.3mol / L Ni(NO 3 ) 2 ·6H 2 O solution, then vacuum filtration to remove the excess solution on the surface, roasted at 300 °C and cooled to room temperature to obtain NiO / SiO 2 Fiber Monolith Catalyst.

[0039] 2) Next, carbon nanofiber templates were prepared by chemical vapor deposition: the NiO / SiO obtained above 2 The fiber is put into a quartz reaction tube as a catalyst, and the quartz reaction tube is placed in a constant temperature zone of the reaction system, and the reaction system is raised from room temperature to 550°C by introducing nitrogen protection, and then, under normal pressure, a flow rate of 20 mL / min is introduced for 2 hours. CH 4 gas to grow carbon nanofibers, and finally the reaction system was cooled to room temperature under a nitrogen atmosphere to ob...

Embodiment 2

[0048] A fibrous nanoporous La 1-x Ca x MnO 3 Catalyst, the catalyst is to load La on the macro matrix material of ordered structure 1-x Ca x MnO 3 The porous material, where x=0.3, La 1-x Ca x MnO 3 The loading amount on the ordered macroscopic matrix material is 40% by weight. The macro matrix material of ordered structure is AAO porous anodic aluminum oxide film.

[0049] A fibrous nanoporous La 1-x Ca x MnO 3 The preparation method of the catalyst adopts the chemical vapor deposition method to synthesize carbon nanofibers on a macroscopic matrix material with an ordered structure, and then uses the carbon nanofibers as a template to deposit La 1-x Ca x MnO 3 Composite oxides are solidified on macroscopic matrix materials with ordered structures to produce fibrous nanoporous La 1-x Ca x MnO 3 catalyst.

[0050] The method includes the following steps:

[0051] (1) Immersing the macroscopic matrix material of the ordered structure in the precursor solution ...

Embodiment 3

[0058] A fibrous nanoporous La 1-x Ca x MnO 3 Catalyst, the catalyst is to load La on the macro matrix material of ordered structure 1-x Ca x MnO 3 The porous material, where x=0.4, La 1-x Ca x MnO 3 The loading amount on the ordered structure macro matrix material is 50% by weight. The macro matrix material of ordered structure is vermiculite or hydrotalcite.

[0059] A fibrous nanoporous La 1-x Ca x MnO 3 The preparation method of the catalyst adopts the chemical vapor deposition method to synthesize carbon nanofibers on a macroscopic matrix material with an ordered structure, and then uses the carbon nanofibers as a template to deposit La 1-x Ca x MnO 3 Composite oxides are solidified on macroscopic matrix materials with ordered structures to produce fibrous nanoporous La 1-x Ca x MnO 3 catalyst.

[0060] The method includes the following steps:

[0061] (1) Immersing the macroscopic matrix material of the ordered structure in the precursor solution of the c...

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Abstract

The invention relates to a fibrous nano-porous catalyst, a preparation method thereof and application. Lal-xCaxMnO3 porous materials are loaded on a macroscopic base material with an ordered structure, the x is larger than 0 but smaller than 1, the loading quantity of the Lal-xCaxMnO3 on the macroscopic base material with the ordered structure is the weight ratio of 40-60%, carbon nanofibers are synthesized on the macroscopic base material with the ordered structure by a chemical vapor deposition method, Lal-xCaxMnO3 composite oxide is solidified on the macroscopic base material with the ordered structure by using carbon nanofibers for making a mould board, and finally, the carbon nanofibers are removed in a roasting manner to prepare the fibrous nano-porous Lal-xCaxMnO3 catalyst. Compared with the prior art, the fibrous nano-porous Lal-xCaxMnO3 catalyst has high adsorptive and catalytic performances, is simple in preparation process, low in cost, high in repeatability, remarkable in social and economic benefit and beneficial to popularization and application, and has a potential application prospect.

Description

technical field [0001] The invention relates to an inorganic catalytic material and its preparation method and application, in particular to a fibrous nanoporous catalyst for catalyzing and oxidizing carbon black particles in diesel vehicle exhaust with high performance, and its preparation method and application. Background technique [0002] Gasoline engine and diesel engine are the main power sources of automobiles, and diesel engine has gradually become the first choice for vehicle power due to its advantages of low fuel consumption, high power, high reliability and durability. However, the carbon black particles emitted by diesel vehicle exhaust have caused serious environmental pollution problems, and with the acceleration of automobile dieselization, this trend will become more prominent, so it is very important to control and eliminate the emission of diesel vehicle exhaust carbon black particles meaning. Scientific studies have shown that carbon black particles are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34F01N3/20
Inventor 吴强赵立吴江姚伟峰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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