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강태규 ( Tae Kyu Kang ),조유식 ( You Sik Cho ),지홍엽 ( Hong Yeop Jee ),이은진 ( Eun Jin Lee ),김의용 ( Eui Yong Kim ) 서울시립대학교 산업기술연구소 2006 산업기술연구소논문집 Vol.14 No.-
Generally, diffusion coefficient is a function of temperature and molecular weight of gas molecules. In this study, diffusion coefficients of methyl alcohol, ethyl alcohol and n-propyl alcohol were measured in air by varying system temperature. Mass transfer apparatus for measureing gaseous diffusivity was used for the experimental investigation. Temperatures were 30℃, 40℃, 50℃, and diffusion coefficients for each temperature were obtained. As a result, gaseous diffusion coefficients increase with increasing the system temperature. However, the diffusion coefficient decreases as the molecular weight of liquid increases. It was found that liquid vapor pressure and gaseous diffusion coefficient has a general trend: the diffusion coefficient is increasing with increasing vapor pressure.