In-situ and quasi-in-situ heterogeneous catalytic electron paramagnetic resonance platform and using method

Abstract

The invention discloses an in-situ and quasi-in-situ heterogeneous catalysis electron paramagnetic resonance platform and a using method. The in-situ and quasi-in-situ heterogeneous catalysis electron paramagnetic resonance platform is composed of a gas distribution system device and an in-situ reaction tank device. The gas distribution system device consists of an external steel cylinder, a pressure reducer, a filter, a needle valve, an electronic pressure gauge, a mass flow meter, a one-way valve, an unloading valve, a temperature measuring point, a ball valve and a back pressure valve, and is assisted by a display panel for accurate control and real-time switching; and the in-situ reaction tank device is composed of a double-layer glass sleeve, a light source and a resonant cavity of the electron paramagnetic resonance spectrometer. The platform is simple to operate and convenient to disassemble, can be operated on the basis of an original electron paramagnetic resonance instrument, and can realize in-situ (the reaction temperature<=250 DEG C) / quasi-in-situ (the reaction temperature >250 DEG C) illumination / heating experimental conditions, and the pressure lower than 10Mpa of a reaction system.

Description

technical field [0001] The invention relates to the technical field of paramagnetic resonance, in particular to an in-situ and quasi-in-situ heterogeneous catalytic electron paramagnetic resonance platform and a using method. Background technique [0002] The electron paramagnetic resonance spectrometer can provide atomic and electronic scale information, which is of great help to understand the reaction process. If the existing electron paramagnetic resonance spectrometer can be transformed into an in-situ device, it will be able to provide more information under in-situ conditions response information. Under the current level of instrument technology, the electron paramagnetic resonance spectrometer can only meet the test conditions in the air atmosphere and at a lower temperature, and it is still lacking in the in-situ reaction test under high temperature, high pressure and gas mobile phase. [0003] For the electron paramagnetic resonance test, there are still some tech...

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Problems solved by technology

[0003] For the electron paramagnetic resonance test, there are still some technical gaps, such as: 1. The daily test is usually a test under the air atmosphere condition, and the test that requires a specific atmosphere condition cannot meet the requirements; 2. When performing a test under a specific atmosphere condition , can only be operated under normal pressure, and impurities such as air and moisture are easily mixed into the test system, resulting in the inability to obtain accurate test results; 3. If the system needs to be heated during the in-situ reaction process, the existing instrument conditions can only meet the lower reaction requirements Temperature, the system that exceeds the upper limit of the reaction temperature of the instrument cannot be tested; 4. When testing specific atmospheric conditions, the conditions of the gas flow test cannot be met, making the gas and the sample to be tested uneven and the gas components cannot be accurately controlled. Therefore, the expected test results cannot be achieved

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