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A hydrogenation catalyst based on carbon nanotube/alumina composite carrier and its preparation method and application

A technology of hydrogenation catalyst and composite carrier, applied in metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problem of difficult reduction of spinel and failure of active components , the strong interaction between the carrier and the active component, etc., to achieve the effect of improving the active component, improving the utilization rate, and strengthening the mechanical strength

Active Publication Date: 2021-06-25
国能氢油(广东)科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, Al 2 o 3 Carrier-supported metal active components are widely used in hydrogenation processes, but Al 2 o 3 The interaction between the carrier and the active component is too strong, and it is easy to produce products such as spinel. In the reduction process, the spinel is difficult to be reduced to the metal active component, resulting in the failure of some active components.

Method used

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  • A hydrogenation catalyst based on carbon nanotube/alumina composite carrier and its preparation method and application
  • A hydrogenation catalyst based on carbon nanotube/alumina composite carrier and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Mix 10g 40-60 mesh γ-Al 2 o 3 Add 3g of ethanol to disperse, mill on a ball mill for 40min to achieve surface activation, and make activated γ-Al 2 o 3 ;

[0034] 2. Take 4g of pseudoboehmite and add 40ml of 0.1mol / L dilute nitric acid to configure AlOOH sol, take 1g of carboxylated carbon nanotubes and ultrasonically disperse them in 15ml of water, and fully stir and mix them with AlOOH sol under ultrasonic to obtain CNT- AlOOH sol mixture;

[0035] 3. Combine the CNT-AlOOH sol mixture obtained in step 2 with the activated γ-Al obtained in step 1 in batches 2 o 3 Mixing, when the sol solution soaks the γ-Al 2 o 3 Stop adding liquid on the surface, and the γ-Al coated with CNT-AlOOH sol mixture 2 o 3 Move it into a drying oven, dry at 105°C for 2 hours, take it out and continue to use CNT-AlOOH sol mixture to infiltrate γ-Al 2 o 3 On the surface, dry at 105°C for 2 hours and repeat several times to obtain 15g of γ-Al with CNT-AlOOH sol mixture attached 2 ...

Embodiment 2

[0039] 1. Mix 10g 40-60 mesh γ-Al 2 o 3 Add 3g of ethanol to disperse, mill on a ball mill for 40min to achieve surface activation, and make activated γ-Al 2 o 3 ;

[0040] 2. Take 4g of pseudoboehmite and add 40ml of 0.1mol / L dilute nitric acid to form AlOOH sol, take 0.5g of carboxylated carbon nanotubes in 7.5ml of water for ultrasonic dispersion, and fully stir and mix with AlOOH sol under ultrasonic to obtain CNT -AlOOH sol mixture;

[0041] 3. Combine the CNT-AlOOH sol mixture obtained in step 2 with the activated γ-Al obtained in step 1 in batches 2 o 3 Mixing, when the sol solution soaks the γ-Al 2 o 3 Stop adding liquid on the surface, and the γ-Al coated with CNT-AlOOH sol mixture 2 o 3 Move it into a drying oven, dry at 105°C for 2 hours, take it out and continue to use CNT-AlOOH sol mixture to infiltrate γ-Al 2 o 3 On the surface, dry at 105°C for 2 hours and repeat several times to obtain 14.5g of γ-Al with CNT-AlOOH sol mixture attached 2 o 3 ;

[0...

Embodiment 3

[0045] 1. Mix 10g 40-60 mesh γ-Al 2 o 3 Add 3g of ethanol to disperse, mill on a ball mill for 40min to achieve surface activation, and make activated γ-Al 2 o 3 ;

[0046] 2. Take 3g of pseudoboehmite and add 30ml of 0.1mol / L dilute nitric acid to form AlOOH sol, take 0.5g of carboxylated carbon nanotubes in 7.5ml of water for ultrasonic dispersion, and fully stir and mix with AlOOH sol under ultrasonic to obtain CNT -AlOOH sol mixture;

[0047] 3. Combine the CNT-AlOOH sol mixture obtained in step 2 with the activated γ-Al obtained in step 1 in batches 2 o 3 Mixing, when the sol solution soaks the γ-Al 2 o 3 Stop adding liquid on the surface, and the γ-Al coated with CNT-AlOOH sol mixture 2 o 3 Move it into a drying oven, dry at 105°C for 2 hours, take it out and continue to use CNT-AlOOH sol mixture to infiltrate γ-Al 2 o 3 On the surface, dry at 105°C for 2 hours and repeat several times to obtain 13.5g of γ-Al with CNT-AlOOH sol mixture attached 2 o 3 ;

[0...

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Abstract

The invention belongs to the technical field of hydrogenation catalysts, and discloses a hydrogenation catalyst based on a carbon nanotube / alumina composite carrier, a preparation method and an application thereof. The aqueous dispersion of carboxylated carbon CNT is mixed with AlOOH sol, and the CNT-AlOOH sol mixture is wrapped with activated γ-Al 2 o 3 , dried and calcined at 350-600°C under an inert atmosphere to obtain CNT@γ‑Al 2 o 3 Carrier; dissolving the salts of non-precious metal A in ethylene glycol, or dissolving the salts or acids of noble metal B in HCl, respectively, with CNT@γ‑Al 2 o 3 Mix the carrier, adjust the pH value, add hydrazine hydrate and carry out the reduction reaction, cool, filter with suction, wash with water, and dry to obtain A / CNT@γ‑Al 2 o 3 or B / CNT@γ‑Al 2 o 3 hydrogenation catalyst. The method improves the utilization rate of the CNT, enhances the mechanical strength of the catalyst, and improves the activity of the hydrogenation reaction.

Description

technical field [0001] The invention belongs to the technical field of hydrogenation catalysis, more specifically, relates to a carbon nanotube / alumina (Al 2 o 3 ) Hydrogenation catalyst of composite carrier and its preparation method and application. Background technique [0002] As a clean, efficient, safe and sustainable new energy source, hydrogen energy will receive more attention after its development and utilization after the climate change conference. Hydrogen is often used as a fuel in the aerospace field, or hydrogen storage materials are developed and applied to fuel cells. The development of hydrogen storage technology has a significant impact on the large-scale application of hydrogen energy. For vehicle hydrogen storage, the mass hydrogen storage density must reach 5%, and the volume hydrogen storage density must be greater than 40kg / m 3 , the dehydrogenation temperature is lower than 423K, and the cycle life must be greater than 1000 times. The U.S. Depart...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J32/00B01J21/18B01J23/46B01J23/42B01J23/755B01J37/34B01J37/08C07D209/86
CPCB01J21/18B01J23/42B01J23/462B01J23/755B01J37/0036B01J37/082B01J37/343C07D209/86
Inventor 林进猛李利新
Owner 国能氢油(广东)科技股份有限公司
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