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Method for catalyzing dehydrogenation of methylcyclohexane by using platinum-carbon catalyst

A catalyst technology for catalyzing methylcyclohexane and platinum carbon catalysts, applied in the field of catalysis, can solve problems such as the inability to meet the requirements of stability, activity and selectivity, and achieve strong synergy, high anti-coking performance, and stability. high effect

Pending Publication Date: 2022-01-28
XIAN CATALYST NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above catalysts still cannot meet the stability, activity and selectivity requirements of current organic liquid hydrogen storage dehydrogenation catalysts.

Method used

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  • Method for catalyzing dehydrogenation of methylcyclohexane by using platinum-carbon catalyst
  • Method for catalyzing dehydrogenation of methylcyclohexane by using platinum-carbon catalyst

Examples

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Embodiment 1

[0032] This embodiment provides a platinum carbon catalyst, including an activated carbon carrier and a metal component loaded on the activated carbon carrier, the metal component is Pt and a promoter metal, the promoter metal is Ni, and in the catalyst The mass percent content of Pt is 1.0%, and the mass percent content of the auxiliary metal Ni is 1.0%.

[0033] The present embodiment provides a kind of method for preparing above-mentioned platinum carbon catalyst, comprises the following steps:

[0034] Step 1, place 20g of activated carbon in the furnace, feed into nitrogen / argon atmosphere, raise the temperature to 800°C at a rate of 5°C / min and keep for 8h, then cool; the flow ratio of nitrogen / argon is 50sccm:50sccm;

[0035] Step 2, soak and stir the cooled material in step 1 in 100 mL of pentafluoroaniline aqueous solution for 24 hours, filter, and dry to obtain the pretreated carrier; the mass percentage of the pentafluoroaniline aqueous solution is 1%;

[0036] Ste...

Embodiment 2

[0042]This embodiment provides a platinum carbon catalyst, including an activated carbon carrier and a metal component loaded on the activated carbon carrier, the metal component is Pt and a promoter metal, the promoter metal is Fe, and in the catalyst The mass percent content of Pt is 0.2%, and the mass percent content of auxiliary metal Fe is 2.5%.

[0043] The present embodiment provides a kind of method for preparing above-mentioned platinum carbon catalyst, comprises the following steps:

[0044] Step 1. Put 20g of activated carbon in the furnace, pass into nitrogen / argon atmosphere, raise the temperature to 1000°C at a rate of 10°C / min and keep for 10h, then cool; the flow ratio of nitrogen / argon is 80sccm:20sccm;

[0045] Step 2. Soak the cooled material in Step 1 in 100 mL of pentafluoroaniline aqueous solution and stir for 24 hours, filter, and dry to obtain the pretreated carrier; the mass percentage of the pentafluoroaniline aqueous solution is 3%;

[0046] Step th...

Embodiment 3

[0052] This embodiment provides a platinum carbon catalyst, including an activated carbon carrier and a metal component loaded on the activated carbon carrier, the metal component is Pt and a promoter metal, the promoter metal is Cu, and in the catalyst The mass percent content of Pt is 0.8%, and the mass percent content of the additive metal Cu is 2.0%.

[0053] The present embodiment provides a kind of method for preparing above-mentioned platinum carbon catalyst, comprises the following steps:

[0054] Step 1, place 20g of activated carbon in the furnace, pass into a nitrogen / argon atmosphere, rise to 1100°C at a heating rate of 5°C / min and keep for 5h, then cool; the flow ratio of the nitrogen / argon is 70sccm:30sccm;

[0055] Step 2: soak and stir the cooled material in step 1 in 100 mL of pentafluoroaniline aqueous solution for 24 hours, filter, and dry to obtain the pretreated carrier; the mass percentage of the pentafluoroaniline aqueous solution is 2%;

[0056] Step t...

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Abstract

The invention discloses a method for catalyzing dehydrogenation of methylcyclohexane by using a platinum-carbon catalyst, wherein the feeding speed of methylcyclohexane is 0.1 time of the mass of the platinum-carbon catalyst, the reaction temperature is 300 DEG C, and the platinum-carbon catalyst is prepared by the following preparation method: 1, keeping activated carbon in an inert atmosphere; 2, soaking and stirring in a pentafluoroaniline aqueous solution; 3, dissolving a soluble salt of an auxiliary agent metal and polyvinylpyrrolidone, and dropwise adding a reducing agent; 4, placing a pretreated carrier in a stabilized system; 5, dropwise adding a chloroplatinic acid absolute ethyl alcohol solution into the stirred system; 6, adjusting the pH value, and refluxing; and 7, reducing. According to the invention, the conversion rate of the dehydrogenation reaction is maintained at 95% or above, the highest selectivity can reach 99.9%, the conversion rate of the raw materials after continuous reaction for 336 h can still reach 99.2%, the highest selectivity can reach 99.8%, and the catalyst has high dehydrogenation reaction activity, selectivity and stability.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to a method for catalyzing the dehydrogenation of methylcyclohexane with a platinum carbon catalyst. Background technique [0002] Hydrogen energy has always been regarded as an ideal future clean energy. Hydrogen energy has the characteristics of abundant sources, high energy density and no pollution emissions. From the perspective of domestic hydrogen energy development, hydrogen storage and transportation technology is the most important factor restricting the development of hydrogen energy. The technical bottleneck, organic liquid hydrogen storage has become a research hotspot for scientific researchers due to its safety and stability, large hydrogen storage capacity, and highly reversible hydrogenation-dehydrogenation. Hydrogen in organic liquid hydrogen storage materials can exist in the form of organic liquid. Organic liquid hydrogen storage technology includes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/63B01J23/89B01J35/00B01J37/02B01J37/16B01J37/18C01B3/26C07C5/367C07C15/06
CPCB01J23/892B01J23/8906B01J23/8926B01J23/63B01J37/0207B01J37/18B01J37/16C07C5/367C01B3/0015C01B3/26B01J35/394C07C15/06Y02E60/32Y02P20/52
Inventor 颜攀敦陈丹张洁兰张彬雁程杰高明明万克柔
Owner XIAN CATALYST NEW MATERIALS CO LTD
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