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High-activity aluminum oxide loaded platinum catalyst, preparation method and application thereof

A technology of alumina-loaded and platinum catalysts, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of insufficient activity

Pending Publication Date: 2021-09-10
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Current application of Pt / Al 2 o 3 The activity of the catalyst for the catalytic dehydrogenation of dibenzyltoluene is not high enough

Method used

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  • High-activity aluminum oxide loaded platinum catalyst, preparation method and application thereof
  • High-activity aluminum oxide loaded platinum catalyst, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Prepare Pt / Al as follows 2 o 3 -P-CH 4 catalyst

[0042] (1) Weigh 0.5gAl 2 o 3 And spread it in the plasma reactor, wherein the thickness of the quartz glass is 1mm, and the discharge gap is 8mm. Methane and argon flowed through the reactor at a flow rate of 50ml / min respectively, using a sinusoidal discharge, with a peak-to-peak voltage of 45kV, and a discharge time of 3 minutes each time, a total of 5 discharges, with an interval of 15 minutes between each two discharges The sample is stirred to obtain Al 2 o 3 -P-CH 4 ;

[0043] (2) Dilute H by equal volume impregnation 2 PtCl 6 solution impregnated in Al 2 o 3 -P-CH 4 (Pt content is 3wt%), dried at 80°C for 12 hours, and calcined at 400°C for 2 hours in a hydrogen atmosphere to obtain 3%Pt / Al 2 o 3 -P-H 2 catalyst.

[0044] Put 0.8g of the above catalyst into a 50ml high-pressure stirred reactor, put 10mL of perhydrogenated dibenzyltoluene, and pass through pure hydrogen for purging, the pressure i...

Embodiment 2

[0046] Prepare Pt / Al as follows 2 o 3 -P-CH 3 COOH catalyst:

[0047] Control the flow rate of argon flow to be 100ml / min to flow through the bubbler equipped with acetic acid, and then flow through the reactor. The rest of the preparation process and implementation process of the catalyst are the same as in Example 1.

[0048] In the catalytic reaction, the dehydrogenation rate was 74.2% in 5 hours, which was 18.5% higher than the 62.6% dehydrogenation rate of the catalyst without plasma treatment.

[0049] see figure 1 , the Pt / Al prepared by the present invention 2 o 3 -P-CH 4 Surface has methyl and methylene groups, Pt / Al 2 o 3 -P-CH 3 The surface of COOH has CH 3 COO-group and a small amount of methyl; figure 1 The middle (a) curve is used for comparison to illustrate that the carrier surface not using methane and acetic acid atmosphere dielectric barrier discharge plasma treatment does not contain related groups: figure 1 2964, 2930, 2877, 1456 and 1386cm in ...

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Abstract

The invention discloses a high-activity aluminum oxide loaded platinum catalyst, a preparation method and application thereof, and belongs to the field of catalytic reaction engineering. According to the technical scheme, an aluminum oxide carrier is pretreated by adopting dielectric barrier discharge organic plasma to obtain an aluminum oxide carrier grafted with an organic group; and platinum is loaded on the pretreated aluminum oxide carrier by an impregnation method to obtain the high-activity aluminum oxide-loaded platinum catalyst. According to the invention, a green and environment-friendly dielectric barrier discharge low-temperature plasma method is used for preparing the high-activity aluminum oxide loaded platinum catalyst, the prepared catalyst has good catalytic activity on catalytic dehydrogenation reaction in the dibenzyl toluene hydrogen storage process, the hydrogen storage efficiency can be effectively improved, and the catalyst is popularized and applied to preparation of liquid organic hydrogen storage carriers and has good economic benefits.

Description

technical field [0001] The invention belongs to the field of catalytic reaction engineering, in particular to a preparation method and application of a high-activity alumina-supported platinum catalyst, in particular to a preparation method of a dielectric barrier discharge low-temperature plasma pretreatment alumina-supported platinum catalyst and its application in perhydrogenation Application of benzyltoluene in catalytic dehydrogenation reactions. Background technique [0002] The transportation and storage of hydrogen energy is the key to the large-scale application of hydrogen energy. Liquid organic hydrogen storage is considered to be a hydrogen storage method with great development potential. Commonly used liquid organic hydrogen storage carriers mainly include benzene, toluene, carbazoles, Indoles, benzyltoluene, etc. Dibenzyltoluene is a mature industrial heat transfer oil, which has been used in the field of hydrogen storage. It has high theoretical hydrogen sto...

Claims

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Application Information

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IPC IPC(8): B01J31/06C01B3/26
CPCB01J31/069C01B3/26
Inventor 齐随涛石利斌周一鸣
Owner XI AN JIAOTONG UNIV
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