Measuring method of material's dynamic adsorption coefficient in vacuum state

Abstract

The invention belongs to the technical field of physical and chemical performance measurement of a material and specifically relates to a measuring method of a material's dynamic adsorption coefficient in a vacuum state. The method provided by the invention comprises the following steps: a, a carrier gas and a gas to be adsorbed are mixed, and temperature adjustment and humidity adjustment are carried out; b, the gas mixture which has undergone temperature adjustment and humidification passes through an adsorbing material bed without an adsorbing material and an adsorbing material bed with an adsorbing material respectively, and then the gas mixture undergoes dehumidification; the gas which has undergone dehumidification is processed by a gas chromatography-mass spectrometric method, and the time of concentration of the gas to be adsorbed in the gas mixture reaching the peak is recorded; and c, the dynamic adsorption coefficient is calculated. By the method, the technical problem that it is hard to directly measure inert-gas dynamic adsorption coefficient of activated carbon under the negative pressure condition in the prior art is solved; and by means of vacuum adjustment, temperature and humidity adjustment and the like, the dynamic adsorption coefficient of an adsorbing material under different environmental conditions is measured.

Description

Technical field [0001] The invention belongs to the technical field of material physical and chemical performance measurement, and specifically relates to a method for measuring the dynamic adsorption coefficient of a material in a vacuum state. Background technique [0002] The use of activated carbon to adsorb Ar, Kr, Xe, Rn and other radioactive inert gases is an effective method, especially in nuclear power plants, the use of activated carbon beds to adsorb and retain radioactive inert gases can effectively remove their radioactivity and protect workers. The purpose of physical health and environmental protection from pollution. [0003] The operating state of activated carbon beds in nuclear power plants is mostly negative pressure, so as to prevent the radioactivity in the system from leaking into the external environment due to positive pressure, causing environmental radioactive pollution. At present, there are two types of devices for measuring the adsorption performance ...

AI Technical Summary

Problems solved by technology

Neither of these two types of instruments can directly measure the dynamic adsorption coefficient of activated carbon for inert gases under negative pressure.

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