Device and method for detecting parahydrogen content by using nuclear magnetic resonance

Abstract

The invention discloses a parahydrogen content detection device utilizing nuclear magnetic resonance, which comprises a parahydrogen inlet channel and a common hydrogen inlet channel which are both connected with the inlet end of a third one-way valve, and the outlet end of the third one-way valve is connected with one end of a sampling gas inlet pipe; the other end of the sampling gas inlet pipe penetrates through the sealing plug at the opening of the reaction sampling pipe and extends to the bottom of the reaction sampling pipe, porous material filler is loaded at the bottom of the sampling pipe, and one end of the sampling gas outlet pipe penetrates through the sealing plug at the opening of the reaction sampling pipe and extends to the top of the reaction sampling pipe; and the sampling air outlet pipe is connected with a third pressure gauge and a first back pressure valve, the other end of the first back pressure valve is in empty connection, the outlet end of the third one-way valve is connected with one end of a fifth straight-through valve, and the other end of the fifth straight-through valve is connected with a vacuum gauge and a vacuum pump. The invention also discloses a parahydrogen content detection method using nuclear magnetic resonance. The method is simple in structure, simple and convenient to control and operate, and capable of efficiently and accurately detecting the content of parahydrogen in parahydrogen-enriched gas.

Description

technical field [0001] The present invention relates to the technical field of magnetic resonance spectroscopy, more specifically to a parahydrogen content detection device using nuclear magnetic resonance, and also to a parahydrogen content detection method using nuclear magnetic resonance. It is a detection technology suitable for quantitative analysis of parahydrogen gas content in hydrogen gas. Background technique [0002] Parahydrogen (Para-hydrogen) molecule is a special kind of hydrogen molecule, it has a pair of hydrogen atoms with opposite spin directions, and is a hydrogen molecular spin isomer with orthohydrogen. Due to its unique physical configuration, parahydrogen plays an important role in many fields. For example, Para-hydrogen Induced Polarization (Para-hydrogen Induced Polarization) is an NMR polarization technique using para-hydrogen molecules as the polarization source. The number difference of the upper particle layout is increased by an order of magn...

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Problems solved by technology

At present, there is no corresponding device design in China to meet the needs, and there is no commercial design to meet the needs abroad. The accuracy and stability of the existing parahydrogen content detection devices are poor, and the parahydrogen content in the gas cannot be accurately and quantitatively analyzed. Bulky and unable to meet the application requirements in specific environments

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