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Transient state experiment device and method for catalyst high temperature and high pressure evaluation

An experimental device, high temperature and high pressure technology, applied in chemical instruments and methods, chemical analysis by catalysis, chemical/physical processes, etc., can solve problems such as transient inaccuracy, achieve fast heating and cooling rates, low surface temperature, small size effect

Active Publication Date: 2017-01-04
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to address the above existing problems, to provide a transient experimental device and experimental method for high-temperature and high-pressure evaluation of catalysts, so as to solve the problem of temporary inaccurate problem

Method used

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  • Transient state experiment device and method for catalyst high temperature and high pressure evaluation

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Experimental program
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Effect test

Embodiment 1

[0033] The structure of the catalyst high temperature and high pressure transient test evaluation device is as follows: figure 1 As shown, it has a reaction shell made of temperature-resistant and pressure-resistant chromium-molybdenum heat-resistant steel. The reaction shell is composed of a constant temperature cabin 20 and a high temperature reactor 7 integrally connected, and there are cavities in the constant temperature cabin and the high temperature reactor that communicate with each other. A sealed ball valve 5 is installed at the connection between the constant temperature cabin 20 and the high temperature reactor 7 on the reaction shell, which is used to control the communication or isolation between the constant temperature cabin 20 and the inner cavity of the high temperature reactor 7 .

[0034] One side of the constant temperature cabin body 20 is provided with a feed inlet 4, and is closed with a connecting flange 3. By opening the connecting flange 3 , materia...

Embodiment 2

[0043] Water gas shift reaction (CO+H 2 O→CO 2 +H 2 ) is an extremely important reaction process in the chemical industry. It is widely used in the ammonia synthesis industry and hydrogen production industry using coal, oil and natural gas as raw materials. It uses Co-Mo as the reaction catalyst, the reaction temperature is 350 ° C, and the reaction pressure is 4 MPa.

[0044] Take 50mg of Co-Mo catalyst and put it into the hanging basket, and feed N into the high temperature reactor at 300mL / min 2 , and send the hanging basket into the high-temperature reactor, heat up to the reaction temperature of 350°C, and put N 2 Switch to the reaction raw material gas (mixed by CO and vaporized water vapor), and discharge the N in the high-temperature reactor through the reaction gas outlet 2 , adjust the pressure to 4MPa to react. Gas chromatography was used to analyze the progress of the reaction. When the CO conversion rate reached 20%, the hanging basket was pulled into the cons...

Embodiment 3

[0046] Catalytic conversion of methane-carbon dioxide to synthesis gas (CH 4 +CO 2 →2CO+2H 2 ) can use a nickel-based catalyst, that is, 30% Ni loaded on γ-Al 2 o 3 on the carrier. Still use 300mL / min of N 2 As protective gas, according to the experimental process of Example 2, in CH 4 When the conversion rate was 10%, a small part of the catalyst was taken out for characterization. Then open the sealed ball valve, continue to put the catalyst into the high-temperature reactor for reaction, and wait for CH 4 When the conversion rate was 20%, a small part of the catalyst was taken out for characterization. Through the above-mentioned series of experimental investigations at different conversion rates, the investigation of the catalytic reaction and the entire catalytic reaction process at a certain conversion rate can be realized.

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Abstract

A transient state experiment device for catalyst high temperature and high pressure evaluation comprises a reaction shell formed by integrally connecting a constant temperature cabin and a high temperature reactor. A sealing ball valve is arranged on the reaction shell for controlling communication or isolation of the constant temperature cabin and the high temperature reactor. A reaction feed gas inlet and a reaction gas exhaust port are arranged in the high temperature reactor, and the high temperature reactor is provided with a heating device. A protective gas inlet and a pressure relief opening are formed in the constant temperature cabin, and the constant temperature cabin is provided with a cooling device. A hanging basket driving device drives a basket to carry a catalyst to descend to enter the high temperature reactor or ascend to enter the constant temperature cabin. The experiment device can accurately represent the real condition of the catalyst when the reaction is stopped, and representation of catalyst intrinsic behaviors based on high temperature and high pressure gas phase catalyst reactions is achieved.

Description

technical field [0001] The invention relates to a device and method for exploring the mechanism of catalytic reaction, in particular to a transient experimental device based on gas-solid phase catalytic reaction under high temperature and high pressure, and a method for evaluating the intrinsic behavior of the catalyst by using the device. Background technique [0002] Gas-solid phase catalytic reaction, that is, the reaction of gas phase components under the action of solid phase catalyst, is the most widely used and largest type of reaction in the chemical industry. According to statistics, about 90% of the catalytic reactions are gas-solid phase catalytic reactions. The earliest industrial gas-solid phase catalytic reaction was built in 1832 in which sulfur dioxide was oxidized to sulfur trioxide on a solid platinum catalyst. At present, many important reactions in industry, such as carbon monoxide conversion and ammonia synthesis in ammonia production, phthalic anhydrid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J8/02G01N31/10
CPCB01J8/0005B01J8/002B01J8/0242B01J8/0285B01J2219/00011G01N31/10
Inventor 王美君任秀蓉申岩峰王建成刘建平常丽萍鲍卫仁
Owner TAIYUAN UNIV OF TECH
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