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Modified carbon nanometer material

A technology of carbon nanomaterials and nanomaterials, applied in the field of modified carbon nanomaterials, which can solve the problems of small loading of active components and poor dispersion

Pending Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the existing preparation method has the problems of small loading of active components and poor dispersion. During the reaction, the catalyst has the advantages of high dispersion of Pt, no acidity of the carrier, basically no coking in the reaction process, high activity and high stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Weigh 2g of single-walled carbon nanotubes (SCNT), add it to 50ml of 68% nitric acid solution, heat at 80°C for 8h, then filter, wash with water until the solution becomes neutral, and dry the obtained SCNT at 120°C for 6h to obtain Processed SCNT.

[0032] Take 0.622mL of chloroplatinic acid solution with a concentration of 16.14mL / L, add 1.378mL of water to prepare a solution, add 2g of treated SCNT to this solution, stir, place at room temperature for 2h, ultrasonicate for 8h, and then dry at 120°C for 4h , and finally put it into a muffle furnace in a He atmosphere and calcined at 350° C. for 4 h to obtain a catalyst.

[0033] The obtained catalytic material is pressed and ground, and the selected particle size is 20-40 mesh, and 0.1 g is evaluated in an isothermal fixed-bed differential reactor. Before the evaluation, it is reduced with hydrogen. The reduction conditions are as follows: normal pressure, temperature 350 ℃, the hydrogen flow rate is 20mL / min, the re...

Embodiment 2

[0036] Weigh 2g of single-walled carbon nanotubes (SCNT), add it to 50ml of 68% nitric acid solution, heat at 80°C for 8h, then filter, wash with water until the solution becomes neutral, and dry the obtained SCNT at 120°C for 6h to obtain Processed SCNT.

[0037] Take 0.124mL of chloroplatinic acid solution with a concentration of 16.14mL / L, add 1.378mL of water to prepare a solution, add 2g of treated SCNT to this solution, stir, place at room temperature for 2h, ultrasonication for 8h, and then dry at 120°C for 8h , and finally put it into a muffle furnace in a He atmosphere and calcined at 350° C. for 4 h to obtain a catalyst.

[0038] The obtained catalytic material is pressed and ground, and the selected particle size is 20-40 mesh, and 0.1 g is evaluated in an isothermal fixed-bed differential reactor. Before the evaluation, it is reduced with hydrogen. The reduction conditions are as follows: normal pressure, temperature 350 ℃, the hydrogen flow rate is 20mL / min, the ...

Embodiment 3

[0040] Weigh 2g of single-walled carbon nanotubes (SCNT), add it to 50ml of 68% nitric acid solution, heat at 80°C for 8h, then filter, wash with water until the solution becomes neutral, and dry the obtained SCNT at 120°C for 6h to obtain Processed SCNT.

[0041] Take 1.244mL of chloroplatinic acid solution with a concentration of 16.14mL / L, add 1.378mL of water to prepare a solution, add 2g of treated SCNT to this solution, stir, place at room temperature for 2h, ultrasonicate for 8h, and then dry at 120°C for 4h , and finally put it into a muffle furnace in a He atmosphere and calcined at 350° C. for 4 h to obtain a catalyst.

[0042] The obtained catalytic material is pressed and ground, and the selected particle size is 20-40 mesh, and 0.1 g is evaluated in an isothermal fixed-bed differential reactor. Before the evaluation, it is reduced with hydrogen. The reduction conditions are as follows: normal pressure, temperature 350 ℃, the hydrogen flow rate is 20mL / min, the re...

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Abstract

The invention discloses a modified carbon nanometer material, a preparation method and uses thereof. The modified carbon nanometer material comprises (a) 0.1-5 parts of an active component and (b) 95-99.9 parts of a carbon nanometer material. The preparation method comprises: (1) carrying out strong acid treatment on a carbon nanometer material; and (2) introducing an active component through impregnation or precipitation in an ultrasonic manner. According to the present invention, the prepared modified carbon nanometer material can solve the problems of low active component loading and poor dispersion of the current material preparation method; and with the application of the modified carbon nanometer material in the low-carbon alkane dehydrogenation or organic liquid hydrogen storage material dehydrogenation reaction, the catalyst has the following advantages that the Pt dispersion degree is high, the carrier is acid-free, the reaction process is substantially non-coking, the activity is high, and the stability is high.

Description

technical field [0001] The invention discloses a modified carbon nanometer material, which can be used for dehydrogenation of low-carbon alkanes, dehydrogenation of organic liquid hydrogen storage materials and other dehydrogenation reactions. Background technique [0002] Carbon nanomaterials have high aspect ratio, large specific surface area, excellent chemical and thermal stability, extremely high mechanical strength, and good electrical conductivity. They have very attractive prospects as catalyst supports in heterogeneous catalysis. So far, many metals or metal oxides, such as Pt, Au, Ru, Pd, RuO 4 Both are supported on carbon nanomaterials to form supported catalysts, which show good catalytic performance in the field of catalysis. [0003] There are many methods for carbon nanotubes to support metals. After carbon nanotubes are modified, there will be a large number of oxygen-containing functional groups on the surface. These oxygen-containing functional groups are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J23/44B01J23/52B01J23/36C01B3/00C07C11/06C07C11/09C07C5/333
CPCB01J23/36B01J23/42B01J23/44B01J23/52C01B3/0015C01B2203/1064C01B2203/107C01B2203/1082C07C5/3335C07C5/3337C07C2523/36C07C2523/42C07C2523/44C07C2523/52C07C11/06C07C11/09Y02E60/32Y02P20/52
Inventor 童凤丫孙清缪长喜邵一凡王仰东
Owner CHINA PETROLEUM & CHEM CORP
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