Catalyst used in the reaction of ammonia synthesis by plasma technology and preparation method thereof
A technology of plasma and catalyst, which is applied in the field of catalyst and its preparation, can solve the problems of poor stability and poor catalyst activity, and achieve the effect of good stability and increased reaction rate
Active Publication Date: 2021-11-19
NORTHWEST UNIV
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Problems solved by technology
It has been found through actual use that most of these catalysts have the problems of poor activity and poor stability.
Method used
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[0023] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.
[0024] Part 1: Preparation of Catalyst
[0025] On the basis of plasma technology, referring to the reaction of thermocatalytic synthesis of ammonia, calcium hydride (CaH 2 ), Lithium hydride (LiH), magnesium powder (Mg powder), aluminum powder (Al powder) and other hydrogen storage materials, through ball milling and other operations to prepare catalysts suitable for use in the reaction of ammonia synthesis using plasma technology .
[0026] Step1: Ball milling
[0027] Weigh a certain amount of CaH 2 , LiH, Mg powder and Al powder are put into the ball mill for ball milling alone, or several of them are mixed according to a certain ratio and then put into the ball mill for ball milling. The ball milling speed is 400r / h, and the ball milling time is 4h.
[0028] Ball milling can both reduce the size of raw materials and allow the two...
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Abstract
The invention discloses a catalyst used in the reaction of using plasma technology to synthesize ammonia and a preparation method thereof, wherein, the preparation method of the catalyst comprises the following steps: (1) adding CaH 2 , Mg powder or Al powder are put into the ball mill separately for ball milling, or CaH 2 Mix it with Mg powder or Al powder according to the mass ratio of 1:1 and put it into a ball mill for ball milling; (2) take out the ball-milled catalyst from the ball mill, put it into a tablet press for tableting; (3) put the catalyst The tableted catalyst was taken out from the tablet press and pulverized to obtain catalyst particles with a diameter of 0.425-0.850mm. The benefits of the present invention are: 1, five kinds of catalyst activity that the present invention makes are all better, can promote the absorption and release of hydrogen in the reaction, improve reaction rate, and ammonia production rate is all higher; 2, this invention The five kinds of catalysts prepared by the invention have good stability, and the yield can still be maintained without decreasing after the reaction is carried out for 40 hours.
Description
technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a catalyst used in the reaction of ammonia synthesis using plasma technology and a preparation method thereof, belonging to the technical field of catalysts. Background technique [0002] Ammonia is the second largest chemical product produced in the world and plays an extremely important role in economic development. [0003] Ammonia is not only an important industrial and agricultural raw material, but also a potential carrier of alternative fuel for vehicles due to its advantages of high energy density, high hydrogen content, and clean combustion. [0004] At present, the method of producing ammonia at home and abroad is mainly based on thermal catalysis. In recent years, the research on the synthesis of ammonia by plasma catalysis has become more and more extensive. The use of plasma technology to synthesize ammonia is of great significance to the economic deve...
Claims
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IPC IPC(8): B01J31/12B01J21/02B01J21/10C01C1/04
CPCB01J21/02B01J21/10B01J31/121C01C1/0494Y02P20/52
Inventor 代成义李雪梅崔懿张梦寒毕文菲
Owner NORTHWEST UNIV