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A platinum/titanium dioxide catalyst for dehydrogenation of dodecahydroethylcarbazole and preparation method thereof

A technology of dodecahydroethylcarbazole and titanium dioxide is applied in the field of organic liquid hydride hydrogen storage to achieve the effects of low preparation cost, mild preparation conditions and mild reducibility

Active Publication Date: 2020-06-26
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Titanium dioxide is an N-type semiconductor. Due to its special photoelectric properties, it has been studied in the field of photocatalysis for a long time, but it has not been applied in the dehydrogenation reaction of dodecahydroethylcarbazole.

Method used

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  • A platinum/titanium dioxide catalyst for dehydrogenation of dodecahydroethylcarbazole and preparation method thereof
  • A platinum/titanium dioxide catalyst for dehydrogenation of dodecahydroethylcarbazole and preparation method thereof
  • A platinum/titanium dioxide catalyst for dehydrogenation of dodecahydroethylcarbazole and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] In this example, a platinum / titanium dioxide catalyst used for dehydrogenation of dodecahydroethylcarbazole, 1.5 g of titanium dioxide and 30 ml of ethylene glycol were added to a container, and the mixture was placed on a magnetic stirrer and stirred for 20 minutes. Then the temperature was raised to 120°C and kept for 20 min, then the heating was stopped and cooled to room temperature. Then the above-mentioned cooled mixture was filtered, rinsed with deionized water and absolute ethanol so that no ethylene glycol remained, and dried in an oven at 60° C. for 6 h. Grind after complete drying, weigh 1.0g for later use.

[0034] Pour 20ml of ethylene glycol into the container, then add 0.0249g of potassium chloroplatinate, place it on a magnetic stirrer and stir for 3h, then add 1.0g of pretreated titanium dioxide that has been weighed to the above mixture of ethylene glycol and platinum , continue stirring for 0.5h, then weigh 0.249g of sodium citrate and add it to the ...

Embodiment 2

[0042] In this example, a platinum / titanium dioxide catalyst used for dehydrogenation of dodecahydroethylcarbazole, 1.0 g of titanium dioxide and 20 ml of ethylene glycol were added to a container, and the mixture was placed on a magnetic stirrer and stirred for 15 minutes. Then the temperature was raised to 120°C and kept for 10 min, then the heating was stopped and cooled to room temperature. Then the above mixture was filtered, rinsed with deionized water and absolute ethanol so that no ethylene glycol remained, and dried in an oven at 70° C. for 8 hours. Grind after complete drying, weigh 0.4g for later use.

[0043] Pour 8ml of ethylene glycol into the container, then add 0.0248g of potassium chloroplatinate, place it on a magnetic stirrer and stir for 3h, then add the weighed 0.4g of pretreated titanium dioxide to the above mixture of ethylene glycol and platinum , continue stirring for 0.5h, then weigh 0.248g of sodium citrate and add it to the above mixture, raise the...

Embodiment 3

[0047] In this example, a platinum / titanium dioxide catalyst used for dehydrogenation of dodecahydroethylcarbazole, 0.8 g of titanium dioxide and 16 ml of ethylene glycol were added to a container, and the mixture was placed on a magnetic stirrer and stirred for 30 minutes. Then the temperature was raised to 130°C and kept for 12 minutes, then the heating was stopped and cooled to room temperature. Then the above mixture was filtered, rinsed with deionized water and absolute ethanol so that no ethylene glycol remained, and dried in an oven at 110° C. for 6 h. Grind after complete drying, weigh 0.5g for later use.

[0048] Pour 10ml of ethylene glycol into the container, then add 0.0655g of potassium chloroplatinate, place it on a magnetic stirrer and stir for 3h, then add the weighed 0.5g of pretreated titanium dioxide to the mixture of ethylene glycol and platinum , continue stirring for 0.5h, then weigh 0.524g of sodium citrate and add it to the above mixture, raise the tem...

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Abstract

The invention discloses a platinum / titanium dioxide catalyst for dehydrogenation of dodecahydroethylcarbazole and a preparation method thereof. The components of the catalyst are platinum, titanium and oxygen, and the mass occupied by platinum, titanium and oxygen in the catalyst is The percentages are 0.5-5.0%, 56.9-59.7% and 38.1-39.8% respectively; the preparation method is divided into two steps: pretreatment of carrier titanium dioxide and synthesis of platinum / titanium dioxide catalyst; in the present invention, sodium citrate is used in ethylene glycol. The supported platinum / titanium dioxide catalyst is prepared as a reducing agent. The resulting catalyst powder has a smaller particle size and is evenly distributed; it can effectively solve the problem of large metal particles and uneven distribution without adding any surfactants and dispersants. problem; the catalyst of the present invention can reduce the amount of precious metal platinum while maintaining reaction activity, increase the selectivity of the final product of the dehydrogenation reaction, ethylcarbazole, to more than 97%, and the total dehydrogenation amount to 5.75wt%.

Description

technical field [0001] The invention belongs to the technical field of organic liquid hydride hydrogen storage, and in particular relates to a platinum / titanium dioxide catalyst for dehydrogenation of dodecahydroethylcarbazole and a preparation method thereof. Background technique [0002] In recent years, the problems of energy crisis and environmental degradation have been plaguing countries all over the world. Experts and scholars are constantly trying to find a more efficient and environmentally friendly energy source to reduce or even replace the traditional fossil fuels in national production and life. As one of the energy sources most likely to be widely used, hydrogen energy has attracted attention in many fields due to its large reserves, high calorific value, and environmental friendliness. Especially in the field of fuel cells, researchers have been trying to apply hydrogen fuel cells to mobile transportation equipment to reduce the emission of toxic and harmful g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/42C07D209/86
CPCB01J23/42C07D209/86B01J35/394
Inventor 姜召龚翔方涛
Owner XI AN JIAOTONG UNIV
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