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公开(公告)号：US20250164457A1
公开(公告)日：2025-05-22
申请号：US19034053
申请日：2025-01-22
Inventor： Huifei TAO , Dongzheng MA , Zhen QIN , Chengfu LV , Zhongping LI , Long SU
Abstract: A semi-closed pyrolysis system, including a liquid nitrogen freezing device, a gas-liquid collector and a pyrolysis gas collecting device. The liquid nitrogen freezing device includes a collecting vessel, a liquid nitrogen storage, an air inlet pipe, an air outlet pipe and a temperature detector. The collecting vessel is arranged in the liquid nitrogen storage container, and is provided with a stainless steel cap. The stainless steel cap is provided with three holes respectively for the air inlet pipe, the air outlet pipe and the temperature detector to pass through. The air inlet pipe and the air outlet pipe are each provided with a valve. The temperature detector includes a probe and a temperature sensor electrically connected with the probe. The probe extends into the collecting vessel. A method for determining carbon isotope composition of light hydrocarbon monomers based on such system is further provided.
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公开(公告)号：US20220065760A1
公开(公告)日：2022-03-03
申请号：US17524181
申请日：2021-11-11
Inventor： Chunhui CAO , Liwu LI , Huanhuan ZHAO , Zhongping LI , Li DU
Abstract: Disclosed are a gas purification device, and an apparatus and a method for measuring isotopes of noble gases. The gas purification device includes a housing and a purification mechanism. The housing is provided with a reaction chamber. The reaction chamber is in a vacuum state and is configured to hold a gas sample. The purification mechanism is arranged on the housing and is provided with a cavity. The cavity in the purification mechanism is communicated with the reaction chamber. The purification mechanism is configured to purify the gas sample in the reaction chamber to obtain a purified gas.
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