Catalyst with functionalized carbon nanotubes as carrier, and preparation method and application thereof

A technology of carbon nanotubes and catalysts, applied in the field of catalysts, functionalized carbon nanotube-supported catalysts and their preparation, can solve the problems of low conversion efficiency, achieve excellent catalytic performance and selectivity, simple production and refining process, The effect of uniform metal dispersion

Inactive Publication Date: 2016-04-13
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a functionalized carbon nanotube-supported catalyst and its preparation method and application. The described functionalized carbon nanotube-supported catalyst and its preparation method And the application solves the technical problem of low conversion efficiency in the preparation of low-carbon diols by catalytic hydrogenolysis of sugar alcohols in the prior art

Method used

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  • Catalyst with functionalized carbon nanotubes as carrier, and preparation method and application thereof

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Experimental program
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Embodiment 1

[0031] The preparation of embodiment 1 aminated carbon nanotube supported Ru catalyst (Ru / AMCN)

[0032] Weigh 0.4186gRuCl 3 ·xH 2 O precursor (Ru content 38-42%), dissolved in 30mL distilled water to prepare RuCl 3 aqueous solution, add 5.0g unfunctionalized carbon nanotubes (AMCN,-NH 2 : 0.45wt%, OD: 8 ~ 18nm, Length: ~ 50μm). After ultrasonication for 3 hours, impregnation overnight with stirring at room temperature, and drying in a vacuum oven at 120° C. for 12 hours, an aminated carbon nanotube-supported Ru catalyst (Ru / AMCN) was obtained.

[0033] Put the above catalyst at 250℃~350℃, H 2 Reduction was carried out for 2 hours at a flow rate of 30 mL / min to obtain reduction-activated carbon nanotube-supported Ru catalysts (Ru / AMCN-250R and Ru / AMCN-350R).

Embodiment 2

[0034]The preparation of embodiment 2 carboxylated carbon nanotube supported Ru catalyst (Ru / CMCN)

[0035] The specific implementation process is the same as in Example 1, but the difference is that RuCl 3 ·xH 2 O was dissolved in 32 mL of distilled water, and the carrier used was aminated carbon nanotubes (CMCN, -COOH: 2.56 wt%, OD, 8-18 nm, Length: ~50 μm).

Embodiment 3

[0036] Preparation of Example 3 Hydroxylated Carbon Nanotube-supported Ru Catalyst (Ru / HMCN)

[0037] The specific implementation process is the same as in Example 1, but the difference is that RuCl 3 ·xH 2 O was dissolved in 32 mL of distilled water, and the carrier used was hydroxylated carbon nanotubes (HMCN, -OH: 3.70 wt%, OD: 8-18 nm, Length: ~ 50 μm).

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Abstract

The invention provides a catalyst. The catalyst adopts functionalized carbon nanotubes as a carrier, metal ruthenium is supported on the carrier, and the load capacity of the metal ruthenium is 3-5%. The invention also provides a preparation method of the catalyst. The method comprises the following steps: isopyknically dipping the functionalized carbon nanotubes in a ruthenium compound solution, carrying out ultrasonic treatment, carrying out constant temperature stirring, ageing the obtained mixture at room temperature overnight, an drying the aged mixture to obtain a metal ruthenium supported catalyst; and carrying out reducing activation on the metal ruthenium supported catalyst at 250-350DEG C in H2 atmosphere for 2-6h to obtain the reduced and activated metal ruthenium supported catalyst. The invention provides an application of the catalyst in a sugar alcohol hydrogenolysis reaction for preparing ethylene glycol and propylene glycol. Compared with traditional catalysts, the catalyst with the functionalized carbon nanotubes to support ruthenium has the advantages of uniform metal dispersion, excellent catalysis performance and selectivity in intermittent sugar alcohol hydrogenolysis technologies, mild reaction conditions, and good stability.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a catalyst, in particular to a catalyst with a functionalized carbon nanotube as a carrier, a preparation method and application thereof. Background technique [0002] In recent years, due to the depletion of petroleum resources and the sharp rise in petroleum prices, the supply of diols as a downstream product of petrochemicals is in short supply. Therefore, it is imminent to find a new way to prepare high value-added chemicals from renewable resources. Biomass is the most abundant and widely distributed renewable energy on earth. Using biomass derivatives as raw materials to produce low-grade polyols through chemical catalytic conversion can reduce the dependence on petroleum resources, which is an important research direction for the utilization of renewable resources. [0003] Lignocellulose can be degraded to obtain bio-based monosaccharides and sugar alcohols. Sugar alcohol ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/46B01J23/656B01J23/652C07C29/00C07C31/20
CPCY02P20/52B01J23/462B01J23/468B01J23/6525B01J23/6527B01J23/6567C07C29/00C07C31/202C07C31/205
Inventor 韩生董慧焕龚文博董波蔺华林
Owner SHANGHAI INST OF TECH
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