Catalytic hydrogenation method by taking toluene as hydrogen storing agent

A technology for catalytic hydrogenation and toluene, applied in the field of chemical engineering, achieves the effects of large hydrogen storage capacity, high reaction conversion rate and simple hydrogen storage equipment

Inactive Publication Date: 2009-11-11
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, compared with noble metal series catalysts, the preparation process of amorphous nickel catalyst is relatively simple, the cost is relatively low, clean and less...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] a, toluene hydrogenation reaction

[0014] Add 0.04mol toluene, 0.4mol hexamethylene and 0.1g of commercially available amorphous nickel (nickel content ≥ 90%) in a 100mL autoclave, feed hydrogen into the autoclave for 3 times, and feed 0.35g of hydrogen, The hydrogen pressure is 7.0MPa. After stopping the hydrogenation, heat up and heat up. The temperature of the oil bath is 180°C. The reaction time is 6 hours. When the pressure in the kettle is stable at 3.2MPa and no longer drops, stop heating and cool to 60°C to discharge. , The conversion rate of toluene was determined to be 99.5%.

[0015] b. Separation of catalyst

[0016] The methylcyclohexane generated by the above reaction is filtered, and the amorphous nickel catalyst is recovered for reuse. The amorphous nickel catalyst is prone to spontaneous combustion in the air, and the filtered catalyst is stored in a water seal to isolate the air.

Embodiment 2

[0018] a, toluene hydrogenation reaction

[0019] In a 100mL autoclave, add 0.04mol toluene, 0.4mol hexamethylene and 1g of commercially available amorphous nickel (nickel content ≥ 90%), pass into the air in the hydrogen replacement kettle for 3 times, and feed 0.35g of hydrogen, the The hydrogen pressure is 7.0MPa, stop the hydrogenation and heat up, the oil bath temperature is 180°C, and the reaction time is 6 hours. When the pressure in the kettle is stable at 3.0MPa and no longer drops, stop heating, and cool to 60°C to discharge. Sampling was carried out to determine that the conversion rate of toluene was 99.9%.

[0020] b. Separation of catalyst

[0021] The methylcyclohexane generated by the above reaction is filtered, and the amorphous nickel catalyst is recovered for reuse.

Embodiment 3

[0023] a, toluene hydrogenation reaction

[0024] In a 100mL autoclave, add 0.04mol toluene, 0.4mol hexamethylene and 0.5g of commercially available amorphous nickel (nickel content ≥ 90%), pass through the air in the hydrogen displacement kettle for 3 times, and pass into 0.35g of hydrogen, The hydrogen pressure is 7.0MPa. After stopping the hydrogenation, heat up and heat up. The temperature of the oil bath is 180°C. The reaction time is 6 hours. When the pressure in the kettle is stable at 3.0MPa and no longer drops, stop heating and cool to 60°C to discharge. , the conversion rate of toluene was determined to be 99.9%.

[0025] b. Separation of catalyst

[0026] The methylcyclohexane generated by the above reaction is filtered, and the amorphous nickel catalyst is recovered for reuse.

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Abstract

The invention discloses a catalytic hydrogenation method by taking toluene as a hydrogen storing agent, which is characterized in that toluene and cyclohexane are taken as carriers, amorphous nickel is taken as a catalyst, and hydrogenation is catalyzing under the pressure of 5.0-7.0MPa and the temperature of 130-180 DEG C so as to generate methylcyclohexane used for storing hydrogen. Compared with the prior art, the method has the advantages of simple hydrogen storing equipment, large hydrogen storing quantity, low cost, cleanness and environmental protection, has high reversibility of hydrogen storing reaction, can realize the storage of releasing of hydrogen conveniently, and is safe in storage, transportation and maintenance, and high in reaction conversion rate; and hydrogen storage materials and the catalyst can be used repeatedly.

Description

technical field [0001] The invention relates to the technical field of chemical engineering, in particular to a catalytic hydrogenation method using toluene as a hydrogen storage agent. Background technique [0002] Hydrogen energy is a clean and efficient new energy source with abundant sources. The cheap production, safe and efficient storage and transportation and large-scale application of hydrogen are the key issues in the research of hydrogen energy development. The storage of hydrogen is the key to the application of hydrogen energy. In recent years, the new direction in this field is the hydrogen storage of organic liquid hydrides. Hydrogen can be realized through a pair of reversible reactions between unsaturated organic liquids and hydrogen (ie hydrogenation reaction and dehydrogenation reaction). storage and release [Ren Jianwei et al., Modern Chemicals, 2006, 26(3): 15-18]. Compared with traditional metal hydride hydrogen storage and high-pressure compression hy...

Claims

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Application Information

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IPC IPC(8): C07C13/18C07C5/10B01J23/755C01B3/24
Inventor 杨建国王箭朱娟陈露
Owner EAST CHINA NORMAL UNIV
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