High-activity catalyst used for hydrogen production by dehydrogenation of organic hydrogen storage compound and reduced in noble metal consumption, and preparation method thereof

The technology of catalyst and compound is applied in the field of dehydrogenation hydrogen production catalyst of highly active organic hydrogen storage compound with reduced amount of precious metal and its preparation field, which can solve the problems of high price and low dehydrogenation activity of dehydrogenation catalyst.

Active Publication Date: 2020-11-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used dehydrogenation catalysts include supports and active components. Generally speaking, dehydrogenation catalysts with noble metals as active components have higher dehydrogenation activity and better selectivity. However, pure noble metal catalysts are expensive, and according to the existing Method The dehydrogenation activity of the dehydrogenation catalyst prepared by substituting some noble metals with non-noble metals is not high

Method used

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  • High-activity catalyst used for hydrogen production by dehydrogenation of organic hydrogen storage compound and reduced in noble metal consumption, and preparation method thereof
  • High-activity catalyst used for hydrogen production by dehydrogenation of organic hydrogen storage compound and reduced in noble metal consumption, and preparation method thereof
  • High-activity catalyst used for hydrogen production by dehydrogenation of organic hydrogen storage compound and reduced in noble metal consumption, and preparation method thereof

Examples

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Embodiment approach

[0056] In the catalyst preparation method provided by the present invention, in step (1), the airflow of the modified metal oxide precursor carried by the gas is contacted with the alumina substrate, and the temperature of the contact is preferably 15-350° C., for example, 15-300° C. or 15-300° C. 100°C or 15-200°C or 18-60°C or 15-40°C. The temperature of the gas is room temperature-350°C, for example, room temperature-300°C or 15-300°C. The room temperature is, for example, 15-40° C., and the contact pressure can be 0.05-5 atm, for example, 1-3 atm. When the modified metal precursor on the alumina substrate reaches a preset loading capacity, the contact with the modified metal oxide precursor carried by the gas is stopped to obtain an alumina substrate loaded with the modified metal oxide precursor. The time that the alumina substrate is in contact with the gas-entrained stream of the modified metal oxide precursor is referred to as the loading time. In one embodiment, the...

Embodiment 1

[0074] Calcining SB powder at 500℃ for 4h to obtain γ-Al 2 o 3 , the γ-Al 2 o 3 The specific surface area is 176m 2 / g, the pore volume is 0.48ml / g.

[0075] Take the above γ-Al 2 o 3 500g is placed in the fluidized reactor (the diameter of the reactor is 10cm, and the height is 40cm), titanium tetrachloride is placed in a 20°C constant temperature bath, nitrogen (temperature 25°C) passes through the titanium tetrachloride at a flow rate of 10L / min and then Enter the fluidized reactor from the bottom of the fluidized reactor, and after fluidizing for 1 hour, stop passing the nitrogen gas through the titanium tetrachloride bath; The ionized water enters the fluidized reactor from the bottom of the reactor, and is fluidized for 4 hours for hydrolysis to obtain a hydrolyzed carrier. The hydrolyzed carrier was calcined in an air atmosphere at 550° C. for 4 hours to obtain a carrier composition, which was named M-1. The properties of the carrier are shown in Table 1.

Embodiment 2～ Embodiment 8

[0077] The preparation method is the same as carrier preparation example 1, the difference lies in the time for nitrogen to carry titanium tetrachloride into the fluidized bed, and the hydrolysis time for nitrogen to pass through deionized water. The specific values ​​and carrier properties are shown in Table 1.

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Abstract

The invention relates to a high-activity catalyst used for hydrogen production by dehydrogenation of an organic hydrogen storage compound and reduced in noble metal consumption, and a preparation method thereof. The catalyst comprises Pt, a non-noble metal active component, aluminum oxide and modified metal oxide, wherein the modified metal oxide is titanium oxide and/or zirconium oxide; and the value of eta of the modified metal oxide is less than 0.3, the value of theta of the modified metal oxide is greater than or equal to 5, the value of eta is equal to a ratio of the weight percentage ofa crystalline phase modified metal oxide in a carrier composition to the chemical composition weight percentage of the modified metal oxide in the carrier composition, and the value of theta is equalto a ratio of the weight percentage of the modified metal oxide on the surface of the carrier composition to the chemical composition weight percentage of the modified metal oxide in the carrier composition.. The preparation method comprises the following steps: preparing the carrier composition containing the aluminum oxide and the modified metal oxide, conducting dipping and then performing roasting. The catalyst has high dehydrogenation activity and selectivity under the condition that noble metal consumption is reduced.

Description

technical field [0001] The invention relates to a catalyst used for dehydrogenating organic hydrogen storage raw materials to generate hydrogen and a preparation method thereof. Background technique [0002] As a renewable energy source, hydrogen not only has high energy efficiency, but also produces almost no waste. It is expected to become an important alternative energy source to reduce oil consumption, improve the ecological environment, and ensure energy security. Hydrogen exists in gaseous form under normal conditions, and is flammable, explosive, and easy to diffuse. Storage and transportation must ensure safety, high efficiency, and no leakage loss. Therefore, the use of hydrogen energy needs to solve the problem of storage and transportation of hydrogen, which is sustainable and efficient. Large-scale hydrogen production technology has become an urgent need in the era of hydrogen energy. [0003] Hydrogen is directly transported from the production site to the hydr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J23/62B01J23/656B01J23/89B01J35/10C01B3/26C07C5/367C07C15/06
CPCB01J21/063B01J21/066B01J35/1019B01J35/1038C01B3/26C07C5/367C01B2203/1252B01J23/892C01B2203/1082B01J23/835B01J27/1853B01J23/80B01J23/755C07C15/06Y02P90/45
Inventor 林伟杨雪刘俊王磊宋烨孙敏宋海涛
Owner CHINA PETROLEUM & CHEM CORP
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