膜科学与技术

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Design and building of the device for the accurate measurement of gas solubility

Authors： ZHAO Bozhi1，LI Pei*，CAO Bing*

Units： College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029

KeyWords： measurement of gas solubility; dual-volume pressure decay; volume calibration; sorption isotherm

ClassificationCode：TQ315

year,volume(issue):pagination： 2016,36(5):111-115

Abstract：

Based on dual-volume pressure decay method, we designed and built an equipment which could measure the gas solubility accurately（He、H2、N2、O2、CH4、CO2、C2H4、C2H6、C3H6、C3H8 etc.）in various materials such as organics, inorganics and nonvolatile liquids. The operating temperature of the device ranged from ambient temperature to 50℃, and applicable pressure, 0 to 1000psi (0-66atm). Using computer data acquisition system, the device presented with high accuracy (±5%). Virial equation was used to estimate the gas activity in the volume calibration process. Accurate volume of each chamber was determined by changing volume of the sample chamber and the ratios of two volumes as well (taking He as calibration gas). Gas sorption in polymers was measured via the dual-volume pressure decay method. And the sorption isotherm curve of gases was obtained by measuring the equilibrium pressure of each chamber. The measurement result agreed well with the previously reported data, confirming that the equipment we designed above had high accuracy and reliability.

Funds：

国家自然科学基金项目（514030212）；中央高校基本科研业务费专项资金（buctrc201415）

AuthorIntro：

第一作者简介：赵博智（1990-），男，辽宁省沈阳市人，硕士生，主要从事气体分离膜技术的研究，E-mail：stifler901002@126.com *通讯作者，E-mail：lipei@mail.buct.edu.cn；bcao@mail.buct.edu.cn

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