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Ethane, propane selective oxidation catalyst high in activity, and preparation method and applications thereof

A technology for selective oxidation and catalysts, applied in metal/metal oxide/metal hydroxide catalysts, hydrocarbon oxidation to prepare oxygen-containing compounds, physical/chemical process catalysts, etc. Limitation and other problems, to achieve the effect of short preparation cycle, inhibited enrichment, and high catalyst activity

Inactive Publication Date: 2018-06-15
SHENYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although metal oxide catalysts have good catalytic performance for the selective oxidation of low-carbon alkanes, the composition and performance of the catalyst are limited by the preparation method and operating conditions.

Method used

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  • Ethane, propane selective oxidation catalyst high in activity, and preparation method and applications thereof
  • Ethane, propane selective oxidation catalyst high in activity, and preparation method and applications thereof
  • Ethane, propane selective oxidation catalyst high in activity, and preparation method and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This embodiment provides a metal vanadium framework doped mesoporous nano-SiO 2 Particle catalyst in which the molar ratio of V:Si is 0.01:100 V-SiO 2 The catalyst is obtained by the following preparation steps:

[0054] (1) Weigh the corresponding mass of NH 4 VO 4 Add 25mL deionized water, heat and dissolve in a 35°C water bath to form a uniform phase A;

[0055] (2) Weigh 0.5g of CTAB and dissolve it in 45mL of deionized water, add 15mL of ethanol and stir until completely dissolved to obtain solution B;

[0056] (3) Use a pipette to take 15mL of diethyl ether and drop 0.8mL of ammonia water into solution B, stir for 20 minutes, add uniform solution A, and stir for 5 minutes;

[0057] (4) Take 2.5mL TEOS and quickly drop them into the mixed solution of A and B and stir vigorously for 4h. The white precipitate is obtained by filtering (water pump decompression system), washing with water and alcohol several times, and drying in air at 60°C for 24h. The obtained w...

Embodiment 2

[0062] This embodiment provides a metal vanadium framework doped mesoporous nano-SiO 2 Particle catalysts in which the V:Si molar ratio is 2:100 V-SiO 2 The preparation steps of the catalyst are the same as in Example 1, the difference is only in the doping amount of metal vanadium.

[0063] The method for catalyzing the selective oxidation reaction of propane adopted by the catalyst, and the detection and analysis method of reactants are all the same as those in Example 1. The activity evaluation results and main product selectivity are shown in Table 2.

[0064] Table 2 Selective distribution of main products in propane selective oxidation reaction

[0065]

Embodiment 3

[0067] This embodiment provides a metal vanadium framework doped mesoporous nano-SiO 2 Particle catalysts in which the V:Si molar ratio is 1.5:100 V-SiO 2 The preparation steps of the catalyst are the same as in Example 1, the difference is only in the doping amount of metal vanadium.

[0068] The above-mentioned catalysts were evaluated for ethane selective oxidation performance: the ethane selective oxidation reaction was carried out on a miniature fixed-bed reactor, and the gas composition after the reaction was analyzed on-line by a gas chromatograph (7890). The loading amount of catalyst is 0.3g, feeds carrier gas nitrogen and regulates the total flow of carrier gas to be 30mL / min, wherein C 2 h 6 :O 2 :N 2 =2:1:12. After continuing to feed the carrier gas for 30 min, start heating the reaction tube, and then feed ethane with a purity of 99.999%. Subsequently, the reaction temperature was gradually increased, and the reaction products were analyzed. The reaction te...

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Abstract

The invention discloses a vanadium doped mesoporous nanometer SiO2 particle catalyst used for ethane and propane selective oxidation, and a preparation method thereof, and belongs to the technical field of heterogeneous catalysis. Mesoporous nanometer SiO2 particle is taken as a carrier of the catalyst, vanadium is taken as an active component, vanadium oxides are doped into the mesoporous nanometer SiO2 particle skeleton. The preparation method is simple; the specific surface area is large; the channel structure is abundant; in preparation, one-step synthesis method is adopted, and in-suit doping of the active component vanadium is carried out; the preparation method is simple; preparation cycle is short; the structure of the catalyst active component obtained via one-step synthesis method is more stable; the catalyst possesses excellent ethane, propane selective oxidation performance, is high in ethane propane conversion rate, and high in product selectivity.

Description

technical field [0001] The invention belongs to the technical field of catalyst preparation in the technical field of petrochemical catalysis, and in particular relates to a highly active ethane and propane selective oxidation catalyst as well as its preparation method and application. Background technique [0002] In recent years, with the rapid development of social economy and the continuous growth of industrial scale, energy consumption mainly based on fossil fuels has risen sharply, and the shortage of fossil energy such as petroleum has become increasingly prominent. Force people to find new technological paths and development methods. In recent years, with the development of hydraulic fracturing technology, natural gas resources have been developed in a more economical way. This also makes natural gas resources a very potential energy source. Natural gas contains a large amount of low-carbon alkanes, and the conversion of ethane and propane into more valuable chemic...

Claims

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Application Information

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IPC IPC(8): B01J23/22C07C5/48C07C45/33C07C45/35C07C11/06C07C11/04C07C47/06C07C47/22C07C47/02C07C27/14C07C27/18
CPCB01J23/22C07C5/48C07C45/33C07C45/35C07C11/06C07C11/04C07C47/06C07C47/22C07C47/02Y02P20/52
Inventor 赵震范晓强宋佳欣周振田孔莲于学华
Owner SHENYANG NORMAL UNIV
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