Situation This problem is about a Stefan-diffusion tube, where diethyl ether (DEE, CAS No. 60297) diffuses in air at 11.

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Situation This Problem Is About A Stefan Diffusion Tube Where Diethyl Ether Dee Cas No 60297 Diffuses In Air At 11 1 (44.68 KiB) Viewed 19 times

Situation This Problem Is About A Stefan Diffusion Tube Where Diethyl Ether Dee Cas No 60297 Diffuses In Air At 11 2 (12.73 KiB) Viewed 19 times

Situation This problem is about a Stefan-diffusion tube, where diethyl ether (DEE, CAS No. 60297) diffuses in air at 11.85 (°C) and 1 [bar] where, at a given time, the molar evaporation flux is 1.010 (mmol/m2.s). DEE properties: The Antoine constants for DEE (from Thermo II book: vapor pressure in [kPa]; temperature in [°C], and natural logarithm) are: A = 14.0735; B = 2511.29; C = 231.2). Experimental data from Matsunaga et al. (Netsu Bussei, 20, 83, 2006) for the diffusion coefficient of DEE in air have been correlated according to: D = k·(7) 1.8 where the empirical constant k is equal to 3.17x10-10 [m2/s-(K)1.81 Additional properties of DEE: molar mass: 0.07412 [kg/mol); liquid density: 713.4 [kg/m3). The molar mass of air is 0.029 [kg/mol). Requirements: Please estimate the following in the indicated units, and at the conditions of the interface (on the gas side) when appropriate: 1. DEE vapor pressure: [kPa] (um/s) 2. DEE linear velocity: 3. Mixture average velocity: Molar average: [um/s) ... Mass average: [um/s) 4. DEE mass fluxes: ...with respect to mass average velocity: with respect to a fixed reference frame: [mg/m2.s] [mg/m25) ---
5. DEE molar fluxes: with respect to mole average velocity: [umol/m2.s] (umol/m2.8) with respect to a fixed reference frame: 6. Diffusivity of DEE in air: [mm2/s] 7. Distance from the rim of the tube to the liquid DEE surface: [cm