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Device and method for preparing liquid metal catalyst by plasma

A liquid metal and catalyst technology, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of low gas-liquid mass transfer efficiency and achieve rapid preparation, The effect of increasing yield and improving catalytic activity

Active Publication Date: 2021-08-31
DALIAN MARITIME UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a device and method for preparing a liquid metal catalyst by plasma to solve the problem of low gas-liquid mass transfer efficiency when preparing a liquid metal catalyst

Method used

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  • Device and method for preparing liquid metal catalyst by plasma

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1, dissolve oxalic acid and nickel nitrate with a molar ratio of 1:1 in water, and use potassium carbonate to adjust the pH value of the solution to 10 as the reaction solution for preparing the catalyst, discharge it with an AC source, pass oxygen during the discharge process, and the oxygen flow rate is 200mL / min. When the discharge voltage is 5kV, the discharge frequency is 3kHz, and the discharge time is 20min, the solution can be clearly separated into layers, and an oil-soluble nickel oxalate catalyst and a water-soluble catalyst rich in active oxygen components can be obtained respectively. The obtained oil-soluble and water-soluble catalysts were used in the catalytic upgrading of heavy oil at a volume ratio of 3:1, where the viscosity of the heavy oil at 20°C was 2016.66 mPa·s. The experimental results show that when the reaction temperature is 290°C and the reaction time is 24 hours, the viscosity of the heavy oil is 403.33mPa·s, the viscosity reducti...

Embodiment 2

[0033] Example 2, dissolving ammonium heptamolybdate and nickel nitrate with a molar ratio of 1:7 in water, adding oleic acid and using ammonium hydroxide to adjust the pH value of the solution to 8 as the reaction solution for preparing the catalyst, discharging with a pulse source, during the discharge process Ventilate the air, the air flow rate is 500mL / min. When the peak voltage is 25kV, the discharge frequency is 5kHz, the pulse width is 10μs, and the discharge time is 15min, a nickel molybdate bimetallic catalyst rich in active oxygen components can be obtained. The prepared catalyst is used in the catalytic upgrading of heavy oil. The experimental results show that the reaction temperature is 290°C, the reaction time is 24 hours, the viscosity reduction rate reaches 90%, and the API degree increases by 5.2.

Embodiment 3

[0034] Embodiment three, adopt 1mol / L silver nitrate solution, control pH value to be 7, discharge with direct current source, open 8 micropores that diameter is 0.5mm in aeration pipe, and prepare liquid state with the hydrogen of flow rate 150mL / min as carrier gas nanosilver catalyst. When the discharge voltage is 2kV and the discharge time is 30min, the nano-silver catalyst with a particle size of 5-30nm can be obtained.

[0035] The invention adopts the plasma method to prepare the liquid metal catalyst. Compared with the traditional catalyst preparation method, it is more rapid, uniform and efficient, and the catalyst can be produced in a large amount in only tens of minutes; The introduction into the liquid catalyst increases the activity of the catalyst; in addition, the preparation temperature of the catalyst can be effectively controlled by adjusting the discharge parameters. The catalyst prepared by this method has strong practical value and application prospect in ...

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Abstract

The invention discloses a device and a method for preparing a liquid metal catalyst by plasma, the device comprises a reaction chamber and a sealing cover, the reaction chamber and the sealing cover form an accommodating cavity; an aeration head, an aeration pipe and a first electrode are arranged in the accommodating cavity, an insulating sleeve is arranged in the aeration pipe, and a second electrode is arranged in the insulating sleeve; an aeration head is arranged at one end of the aeration pipe, a sealing plug is arranged at the other end of the aeration pipe, and the second electrode is sealed with the aeration pipe through the sealing plug. According to the invention, uniform and high-density plasmas can be formed, a large number of active particles are generated in a gas phase and introduced into a liquid phase to form activated water, and the catalytic forming rate of the liquid metal catalyst can be effectively increased and the preparation efficiency of the liquid metal catalyst can be improved by regulating and controlling the types of active substances and the reaction temperature.

Description

technical field [0001] The invention relates to the field of catalyst preparation, in particular to a device and method for preparing a liquid metal catalyst by plasma. Background technique [0002] As an extremely important part of catalysts, metal catalysts affect industrial production and human life in many ways, such as hydrogen production industry, chemical industry, electroplating industry, etc. The traditional methods of preparing metal catalysts mainly include impregnation method, atomic deposition method, reduction method, solid phase melting method, etc. The process of the above methods is cumbersome and time-consuming in the preparation process, and most of the raw materials contain toxic and harmful reagents. The environment has certain hazards. In view of the above problems, the rapid development of plasma technology in recent years is a good solution. At present, the plasma catalyst preparation technology mainly uses jet discharge, dielectric barrier discharg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/34B01J37/00B01J23/50B01J23/883B01J31/04
CPCB01J37/349B01J37/00B01J23/883B01J31/04B01J23/50
Inventor 信延彬王嘉彬孙冰
Owner DALIAN MARITIME UNIVERSITY
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