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In-situ prepared nickel-based catalyst for catalyzing hydrogen absorption and release of liquid organic hydrogen carrier, and preparation method thereof

A nickel-based catalyst, in-situ preparation technology, applied in the field of hydrogen storage, can solve problems such as high cost of precious metal catalysts, and achieve the effect of excellent catalytic performance

Active Publication Date: 2020-04-17
苏州清德氢能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, one of the main bottlenecks for the catalytic hydrogenation and catalytic dehydrogenation technologies of liquid organic hydrogen supports is the high cost brought about by the use of noble metal catalysts

Method used

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  • In-situ prepared nickel-based catalyst for catalyzing hydrogen absorption and release of liquid organic hydrogen carrier, and preparation method thereof
  • In-situ prepared nickel-based catalyst for catalyzing hydrogen absorption and release of liquid organic hydrogen carrier, and preparation method thereof
  • In-situ prepared nickel-based catalyst for catalyzing hydrogen absorption and release of liquid organic hydrogen carrier, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 12 mg of bis(1,5-cyclooctadienyl) nickel (Ni(COD) to the autoclave 2 ), 2.5 g N -Ethylcarbazole (NEC) and 250 mg γ-Al 2 O 3 After vacuuming and leak detection, heat to 80 ℃ for 2 h, then heat to 180 ℃, fill with 7 MPa hydrogen, and react for 2 h to obtain Ni / Al 2 O 3 catalyst.

[0025] Catalyze the catalyst directly in the reactor N -Ethylcarbazole (NEC) performance evaluation of hydrogen absorption and desorption, the hydrogen absorption reaction can be at 180 ℃, 1MPa H 2 It can be completed in 36 h under the conditions, and the corresponding hydrogen release reaction can be carried out at 200 ℃, 0.1MPa H 2 Under the conditions of 20 h, the hydrogen desorption exceeded 5.2 wt% (hydrogen yield 90%). The schematic diagram of the device for testing the hydrogen absorption and desorption kinetic curve of the liquid organic hydrogen carrier is shown in Figure 4 .

Embodiment 2

[0027] Add 24 mg of bis(1,5-cyclooctadienyl) nickel Ni(COD) to the autoclave 2 , 5 g N -Ethylcarbazole (NEC) and 250 mg γ-Al 2 O 3 After vacuuming and leak detection, heating to 80 ℃, holding for 2 h, then heating to 150 ℃, filling with 5MPa hydrogen, and reacting for 2 h to obtain Ni / Al 2 O 3 catalyst. The Ni / Al 2 O 3 The X-ray diffraction spectrum of the catalyst is shown in figure 1 , Ni / Al 2 O 3 See the transmission electron microscope photo figure 2 .

[0028] Catalyze the catalyst directly in the reactor N -Ethylcarbazole (NEC) performance evaluation of hydrogen absorption and desorption, the catalyst Ni / Al 2 O 3 catalytic N -Ethylcarbazole kinetic curve of hydrogen absorption and desorption see image 3 . The hydrogen absorption reaction can be at 180 ℃, 7 MPaH 2 It can be completed in 20 h under the conditions, and the corresponding hydrogen release reaction can be performed at 200 ℃, 0.1 MPa H 2 Under the conditions of 20 h, hydrogen desorption exceeded 5.6 wt% (hydrogen...

Embodiment 3

[0030] Add 24 mg of bis(1,5-cyclooctadienyl) nickel Ni(COD) to the autoclave 2 , 2.5 g N -Ethylcarbazole (NEC) and 250 mg of reduced graphene (rGO), vacuum and leak detection, heat to 80 ℃, hold for 2 h, then heat to 120 ℃, fill with 7 MPa hydrogen, react for 2 h to obtain Ni / rGO catalyst.

[0031] Catalyze the catalyst directly in the reactor N -Ethylcarbazole (NEC) performance evaluation of hydrogen absorption and desorption, the hydrogen absorption reaction can be at 180 ℃, 7 MPa H 2 It can be completed in 20 h under the conditions, and the corresponding hydrogen release reaction can be performed at 200 ℃, 0.1 MPa H 2 Under the conditions of 8 h, the hydrogen desorption exceeds 5.5 wt% (hydrogen yield 95%). The device for testing the hydrogen absorption and desorption kinetic curve of the liquid organic hydrogen carrier is the same as in Example 1.

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Abstract

The invention belongs to the technical field of hydrogen storage and catalysis, and particularly relates to an in-situ prepared nickel-based catalyst for catalyzing hydrogen absorption and release ofa liquid organic hydrogen carrier, and a preparation method thereof, wherein the catalyst comprises a catalyst carrier and an active catalytic component loaded on the catalyst carrier, and the activecatalytic component is nano nickel formed in situ. The preparation method comprises: carrying out heating and thermal insulation on bis(1,5-cyclooctadiene)nickel, a reaction solvent liquid organic hydrogen carrier and a catalyst carrier under a vacuum condition, heating, inflating with hydrogen, and carrying out a reaction. Compared with the catalyst in the prior art, the catalyst has the following advantages that (1) no complex catalyst preparation process exists; and (2) precious metal is not used while excellent catalytic performance of catalyzing of hydrogen absorption and hydrogen desorption of a liquid organic hydrogen carrier is shown, and the catalyst has important significance in practical application of the liquid organic hydrogen carrier.

Description

Technical field [0001] The invention belongs to the technical field of hydrogen storage and catalysis, and specifically relates to a nickel-based catalyst prepared in situ for catalyzing hydrogen absorption and desorption of a liquid organic hydrogen carrier and a preparation method thereof. Background technique [0002] With the energy crisis and environmental pollution becoming more and more serious today, the energy transition of replacing fossil energy with renewable energy is imminent. As a clean and renewable secondary energy, hydrogen energy is considered to be the core pillar of the energy transition. However, the lack of sufficiently efficient and safe hydrogen storage methods limits the development of hydrogen energy. Liquid organic hydrogen carrier has become one of the most potential hydrogen storage materials due to its high hydrogen storage capacity, good reversibility, and good thermal conductivity. However, liquid organic hydrogen carriers generally have slow hyd...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C01B3/00
CPCB01J23/755C01B3/0005Y02E60/32
Inventor 吴勇余洪蒽谢镭郑捷李星国
Owner 苏州清德氢能源科技有限公司
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