کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
231939 | 1427454 | 2008 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Measurement of diffusion coefficients of p-chloronitrobenzene in CO2-expanded methanol Measurement of diffusion coefficients of p-chloronitrobenzene in CO2-expanded methanol](/preview/png/231939.png)
The diffusion coefficients of p-chloronitrobenzene (p-CNB) in CO2-expanded methanol were measured using the chromatographic peak broadening technique. The measurements were conducted in a temperature range of 323.2–343.2 K, a pressure range of 3.39–10.53 MPa, and a CO2 mole fraction in methanol range of 0–0.5. The diffusion coefficients of p-CNB in the CO2-expanded methanol increased with increasing CO2 mole fraction in methanol at all operational temperatures and pressures. The p-CNB diffusion coefficients were observed to increase with increasing temperature at a fixed pressure for all CO2 mole fractions studied, and decrease with increasing pressure in a fixed temperature and CO2 mole fraction operation. A modified Wilke–Chang equation that could correlate measured diffusion coefficients with an average absolute deviation of 5.68% was proposed in this study.
Journal: The Journal of Supercritical Fluids - Volume 46, Issue 2, September 2008, Pages 112–117