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Dehydrogenation catalyst and preparation method thereof

A technology for dehydrogenation catalysts and hydrogen storage materials, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve problems such as poor stability, low activity, and easy coking, and achieve high dispersion and high activity , to avoid the effect of coking

Pending Publication Date: 2019-05-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is the disadvantages of low activity, poor stability and easy coking of dehydrogenation catalysts existing in the prior art, and a new dehydrogenation catalyst, preparation method and application method thereof are provided. When carbon alkanes are dehydrogenated to prepare low-carbon olefins or organic liquid hydrogen storage materials, it has the advantages of high catalyst activity, good stability and not easy to coke

Method used

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  • Dehydrogenation catalyst and preparation method thereof
  • Dehydrogenation catalyst and preparation method thereof
  • Dehydrogenation catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Weigh 2 grams of molded MCM-41 molecular sieves into a 500ml round bottom flask, add 300ml of toluene, add 15ml of triaminotriethoxysilane, reflux in a water bath at 100°C for 6h, cool, filter, and vacuum dry to obtain organic The modified MCM-41 was measured to have a water absorption rate of 3.0.

[0051] Take 0.622mL of a mixed solution of 16.14mL / L chloroplatinic acid and 1.42ml / L lanthanum chloride, add 5.578mL of water to prepare a solution, add 2g of organic MCM-41 to this solution, stir, and place at room temperature for 2h , and then placed in a vacuum drying oven, dried at 100° C. for 4 hours under a pressure of 0 MPa to obtain a catalyst. The catalyst was put into 1.5 volumes of 20% NaBH4 solution for reduction for 4 hours, and then dried in a vacuum oven at 100° C. and a pressure of 0 MPa for 6 hours to obtain a dehydrogenation catalyst.

[0052] The obtained catalyst is ground into a particle size of 12-20 mesh, evaluated in an isothermal fixed-bed reactor...

Embodiment 2

[0056] Weigh 2 grams of molded MCM-41 molecular sieves into a 500ml round bottom flask, add 300ml of toluene, add 19ml of triaminotriethoxysilane, reflux in a water bath at 100°C for 6h, cool, filter, and vacuum dry to obtain organic The modified MCM-41 was measured to have a water absorption rate of 3.0.

[0057] Take 0.622mL of a mixed solution of 16.14mL / L chloroplatinic acid and 1.42ml / L lanthanum chloride, add 5.578mL of water to prepare a solution, add 2g of organic MCM-41 to this solution, stir, and place at room temperature for 2h , and then placed in a vacuum drying oven, dried at 100° C. for 4 hours under a pressure of 0 MPa to obtain a catalyst. The catalyst was put into 1.5 volumes of 20% NaBH4 solution for reduction for 4 hours, and then dried in a vacuum oven at 100° C. and a pressure of 0 MPa for 6 hours to obtain a dehydrogenation catalyst.

[0058] Evaluation conditions are the same as in Example 1, and the results are shown in Table 1.

Embodiment 3

[0060] Weigh 2 grams of molded MCM-41 molecular sieves into a 500ml round bottom flask, add 300ml of toluene, add 33ml of triaminotriethoxysilane, reflux in a water bath at 100°C for 6h, cool, filter, and vacuum dry to obtain organic The modified MCM-41 was measured to have a water absorption rate of 3.0.

[0061] Take 0.622mL of a mixed solution of 16.14mL / L chloroplatinic acid and 1.42ml / L lanthanum chloride, add 5.578mL of water to prepare a solution, add 2g of organic MCM-41 to this solution, stir, and place at room temperature for 2h , and then placed in a vacuum drying oven, dried at 100° C. for 4 hours under a pressure of 0 MPa to obtain a catalyst. The catalyst was put into 1.5 volumes of 20% NaBH4 solution for reduction for 4 hours, and then dried in a vacuum oven at 100° C. and a pressure of 0 MPa for 6 hours to obtain a dehydrogenation catalyst.

[0062] Evaluation conditions are the same as in Example 1, and the results are shown in Table 1.

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Abstract

The invention discloses a dehydrogenation catalyst and a preparation method thereof. The dehydrogenation catalyst includes: (a) 0.1 to 5 parts of at least one metal, selected from the group VIII elements of the periodic table, or alloys thereof; (b) 0.1 to 3 parts of at least one element, selected from rare earth elements, oxides thereof; and (c) 72 to 99 parts of a carrier. The preparation methodincludes: (1) performing nitride treatment on the carrier to obtain a nitrogen-containing carrier; (2) introducing the active components in an impregnation or precipitation manner; (3) reducing the active components in a low temperature manner to prepare the catalyst. The invention is to solve the technical problems that active components are non-uniform in dispersion and the catalyst is liable to coke and is poor in activity and stability. The dehydrogenation catalyst, when being used for low-carbon alkane dehydrogenation or dehydrogenation reactions of organic liquid hydrogen storage materials, is high in active component dispersibility, is free of acidity of the carrier, is basically free of coking during reactions, and is high in activity and stability. The catalyst can be used in industrial application of the dehydrogenation.

Description

technical field [0001] The invention discloses a dehydrogenation catalyst and a preparation method thereof, in particular to a high-stability dehydrogenation catalyst for organic liquid hydrogen storage materials and a preparation method thereof. Background technique [0002] As a representative of green and sustainable new energy, hydrogen energy has been widely concerned. At the beginning of the 21st century, China, the United States, Japan, Canada, and the European Union all formulated hydrogen energy development plans and rushed to carry out relevant research. Hydrogen energy application includes hydrogen production, storage, transportation and application, among which hydrogen energy storage is the key and difficult point. Hydrogen fuel vehicles are the main way to apply hydrogen energy, and the development of hydrogen storage technology suitable for hydrogen fuel vehicles is a prerequisite for large-scale application of hydrogen energy. [0003] At present, hydrogen ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/03C01B3/00C07C5/333C07C5/367C07C11/06C07C11/09C07C15/06C07C15/04C07C11/04C07C15/24
CPCY02P20/52
Inventor 童凤丫孙清缪长喜邵一凡王仰东
Owner CHINA PETROLEUM & CHEM CORP
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