Elastic and inelastic light scattering from distilling microdroplets for thermodynamic studies

被引:12
作者
Aardahl, CL [1 ]
Foss, WR [1 ]
Davis, EJ [1 ]
机构
[1] UNIV WASHINGTON,DEPT CHEM ENGN,SEATTLE,WA 98195
关键词
D O I
10.1021/ie950443p
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The evaporation rates of single-component droplets and the related thermodynamics of binary component droplets consisting of 1-iodododecane and 1-bromotetradecane have been explored using elastic and inelastic (Raman) light-scattering to determine the droplet size and chemical composition as diffusion-controlled evaporation proceeded. Single droplets were levitated electrodynamically in a chamber and exposed to a vapor-free nitrogen gas stream. Elastic scattering data for the single components, obtained at the same temperature, were used to determine the optical parameters and transport process parameters needed to interpret binary droplet Raman data for mixtures of the halogenated hydrocarbons. Evaporation rate theory coupled with a UNIFAC thermodynamic model for activity coefficients was shown to agree very well with experimental data collected from binary droplets. Results indicate that Raman intensity ratios associated with the C-I and C-Br bonds can be used to follow changes in composition quantitatively, but for greater accuracy more detailed analysis of the effects of morpholoqy-dependent resonances on the Raman effect is needed.
引用
收藏
页码:2834 / 2841
页数:8
相关论文
共 31 条
[1]   DETERMINATION OF ACTIVITY-COEFFICIENTS VIA MICRODROPLET EVAPORATION EXPERIMENTS [J].
ALLEN, TM ;
TAFLIN, DC ;
DAVIS, EJ .
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1990, 29 (04) :682-690
[2]  
Bohren CF., 2008, ABSORPTION SCATTERIN
[3]   A STUDY OF GAS AEROSOL CHEMICAL-REACTIONS BY MICRODROPLET RAMAN-SPECTROSCOPY - THE BROMINE/1-OCTADECENE REACTION [J].
BUEHLER, MF ;
DAVIS, EJ .
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1993, 79 (2-3) :137-149
[4]   MICROPARTICLE RAMAN-SPECTROSCOPY OF MULTICOMPONENT AEROSOLS [J].
BUEHLER, MF ;
ALLEN, TM ;
DAVIS, EJ .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1991, 146 (01) :79-89
[5]   TIME-RESOLVED RAMAN-SPECTROSCOPY FROM REACTING OPTICALLY LEVITATED MICRODROPLETS [J].
CARLS, JC ;
MONCIVAIS, G ;
BROCK, JR .
APPLIED OPTICS, 1990, 29 (19) :2913-2918
[6]   RESONANCE STRUCTURES IN ELASTIC AND RAMAN-SCATTERING FROM MICROSPHERES [J].
CHAN, CK ;
FLAGAN, RC ;
SEINFELD, JH .
APPLIED OPTICS, 1991, 30 (04) :459-467
[7]   MODEL FOR RAMAN AND FLUORESCENT SCATTERING BY MOLECULES EMBEDDED IN SMALL PARTICLES [J].
CHEW, H ;
MCNULTY, PJ ;
KERKER, M .
PHYSICAL REVIEW A, 1976, 13 (01) :396-404
[8]   STUDIES OF CONCENTRATED ELECTROLYTE-SOLUTIONS USING THE ELECTRODYNAMIC BALANCE .1. WATER ACTIVITIES FOR SINGLE-ELECTROLYTE SOLUTIONS [J].
COHEN, MD ;
FLAGAN, RC ;
SEINFELD, JH .
JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (17) :4563-4574
[9]   THE DOUBLE-RING ELECTRODYNAMIC BALANCE FOR MICROPARTICLE CHARACTERIZATION [J].
DAVIS, EJ ;
BUEHLER, MF ;
WARD, TL .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1990, 61 (04) :1281-1288
[10]  
DAVIS EJ, 1992, ADV CHEM ENG, V18