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  • 02월 28일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제123회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Automated cold volume calibration of temperature variation in cryogenic hydrogen isotope sorption isotherm

2019년 2월 13일 21시 44분 22초
ANAL1.O-12 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 09시 : 44분
Analytical Chemistry - Oral Presentation of Young Analytical Chemists I
저자 및
Jaewoo Park, Minji Jung, Hyunchul Oh1,*
Department of Energy Engineering, Gyeongnam National University of Science and Technology, Korea
1Department of Energy Engineering, Gyeongnam National University of Science and Techn, Korea
The gas adsorption isotherm requires accurate measurement for the analysis of porous materials which is used as an index of surface area, pore distribution, adsorption amount of gas. Basically, adsorption isotherms of porous materials were measured conventionally at 77K and 87K using liquid nitrogen and liquid argon. The cold volume calibration in such conventional way was simply done by splitting into two zone (cold and worm volume) through controlling level sensor in Dewar filled with liquid nitrogen or argon. As a result, the BET measurement for textural properties is mainly limited to the N2 or Ar gas. In order to investigate the other gases at various temperature independently, a novel temperature control system for sample cell is required, and consequently the cold volume calibration at various temperature become more important. In this study, the cryocooler system is newly installed in commercial BET device for controlling the sample cell temperature, the automated cold volume calibration of temperature variation for various gases (e.g. hydrogen isotopes) is introduced. This developed calibration method presents reliability and reproducibility of the cryogenic measurements of hydrogen isotope separation in porous materials, and also provide the large flexibility for performing various other gases with temperature.