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Fe-CNx nano composite catalyst as well as preparation method and application thereof

A nanocomposite and catalyst technology, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, and preparation of liquid hydrocarbon mixtures. Polarity and surface basicity, effect of increasing catalytic reaction rate and hydrogenation selectivity

Inactive Publication Date: 2014-10-01
SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Conventional electric heating heats the surface of the object, and gradually increases the temperature inside the object through heat conduction. The power of heating is the temperature difference in the direction of heat flow, so it takes a long time to achieve uniform heating as a whole.
In addition, conventional electric heating has a certain hysteresis during the heating process, which will also cause the catalytic reaction to deviate from the set reaction conditions, resulting in certain errors

Method used

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  • Fe-CNx nano composite catalyst as well as preparation method and application thereof
  • Fe-CNx nano composite catalyst as well as preparation method and application thereof
  • Fe-CNx nano composite catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] In this embodiment, weigh 10 g Fe(NO 3 ) 3 9H 2 O was dissolved in 10g of distilled water, and after fully dissolved, impregnated onto 10g of NaY molecular sieves that had been calcined at 400°C for 10h. After drying at 120°C for 12 hours, grind it to a fineness below 150 μm, put it into a muffle furnace and bake it at 550°C for 5 hours, and cool naturally to obtain Fe / NaY catalyst. The Fe / NaY catalyst sample was loaded into a quartz tube, and the tube furnace was heated to 800 °C by microwaves, and at the same time, a mixed gas of nitrogen and diethylamine (volume ratio 97:3) was introduced into the tube furnace at a flow rate of 10 ml / min. In the quartz tube of the furnace, the constant temperature was treated for 2 hours, and after natural cooling, nitrogen-doped carbon nanotubes CNx were obtained. Then in the obtained nitrogen-doped carbon nanotubes CN x impregnated with ferric nitrate, then dried in an oven at 105 °C for 24 h, and then 2 Calcined at 350 °C for...

Embodiment 2

[0037] In this example, the Fe-CNx nanocomposite catalyst was prepared basically according to the same method as in Example 1, except that triethylamine was used instead of diethylamine as the organic amine.

[0038] Microwave heating was used in the hydrogenation catalytic reaction, the Fe-CNx nanocomposite catalyst was added in an amount of 1.6% of the mass of coal powder, and the constant temperature reaction was carried out at 400 °C and hydrogen pressure of 15 MPa for 1 h. In addition, other Conditions and methods are consistent with Example 1. In the catalytic hydrogenation reaction of this example, the conversion rate of coal is 87.57%, and the yield rate of liquefied oil is 52.91%.

Embodiment 3

[0040] In this example, the Fe-CNx nanocomposite catalyst was prepared basically according to the same method as in Example 1, except that the molecular sieve carrier NaY was replaced by SBA-15, and the heat treatment temperature was changed from 800°C to 900°C.

[0041] Microwave heating was used in the hydrogenation catalytic reaction, the Fe-CNx nanocomposite catalyst was added in an amount of 0.8% of the mass of coal powder, and the constant temperature reaction was carried out at 400°C and hydrogen pressure of 15 MPa for 1 hour. In addition, other Conditions and methods are consistent with Example 1. In the catalytic hydrogenation reaction of this example, the conversion rate of coal is 86.18%, and the yield rate of liquefied oil is 47.63%.

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Abstract

The invention belongs to the technical field of energy material, and particularly relates to a Fe-CNx nano composite catalyst as well as a preparation method and the application of the catalyst. The preparation method comprises the steps of firstly dipping soluble iron salt onto a molecular sieve; after that, feeding organic amine into a tube furnace, and treating by microwave heating to obtain a nitrogen-doped carbon nanotube CNx; loading iron salt onto the carbon nanotube CNx to obtain the final Fe-CNx nano composite catalyst. The preparation method is simple in technology, easy to control, wide in raw material source and low in price of raw material; the obtained Fe-CNx nano composite catalyst is good in repeatability, can be used for coal direct liquefaction hydrogenation catalytic reaction, and is capable of effectively improving the hydrogenation effect of the coal liquefaction reaction, so that the oil yield and the conversion rate of coal liquefaction are improved. Furthermore, when the catalyst is applied to the coal direct liquefaction hydrogenation catalytic reaction, microwave heating is adopted, so that the temperature of a reaction system rapidly rises, a sample is more evenly heated, the reaction time is shortened, and the reaction energy consumption is reduced.

Description

technical field [0001] The invention belongs to the field of energy materials, in particular to a Fe-CN x Nanocomposite catalyst, preparation method and application thereof. Background technique [0002] In recent years, it has become one of the research hotspots in the field of carbon nanotube synthesis and application to improve the application performance of carbon nanotubes by doping carbon nanotubes with nitrogen. In addition to the high specific surface area and relative chemical inertness of traditional carbon materials, this doped carbon nanomaterial has attracted widespread attention in the field of catalysis because of its good dispersion and unique nanotube cavity structure. The special functional groups on the surface of nitrogen-doped carbon nanotubes have a catalytic effect and can be directly used as catalysts, but more nitrogen-doped carbon nanotubes are used as catalyst supports, such as for hydrocarbon hydrogenation reactions, synthesis gas conversion and...

Claims

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Application Information

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IPC IPC(8): B01J29/14B01J29/035B01J27/24C10G1/06
Inventor 王利军刘旗
Owner SHANGHAI SECOND POLYTECHNIC UNIVERSITY
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