화학공학소재연구정보센터
Journal of Chemical and Engineering Data, Vol.51, No.2, 386-391, 2006
Vapor pressure characterization of several phenolics and polyhydric compounds by Knudsen effusion method
The vapor pressures of anthracene, catechol, hydroquinone, caffeic acid, ferulic acid, gentisic acid, and myoinositol have been measured by an isothermal Knudsen effusion method. The vapor pressure correlations fit to the following linear equations: anthracene, ln(p/Pa) (31.886 +/- 0.440) to (11496 149) T/K (from 320 K to 354 K); catechol, ln(p/Pa) = (31.05 +/- 0.18) to (9618 +/- 56) T/K (from 295 K to 310 K); hydroquinone, ln(p/Pa) = (34.595 +/- 0.455) to (12102 +/- 150) T/K (from 327 K to 348 K); caffeic acid, ln(p/Pa) = (45.122 +/- 1.320) to (20466 +/- 550) T/K (from 409 K to 424 K); ferulic acid, ln(p/Pa) = (39.454 +/- 0.402) to (15925 +/- 153) T/K (from 369 K to 390 K); gentisic acid, ln(p/Pa) = (36.297 +/- 0.454) to (14184 168) T/K (from 362 K to 379 K); and myoinositol, ln(p/Pa) = (44.366 +/- 0.702) to (20931 +/- 315) T/K (from 438 K to 458 K). The sublimation enthalpies and entropies of these samples are calculated.