Pressure dependence of the coefficients of mass-transfer resistance in gas chromatography

✍ Scribed by J. Novák; Wičak; P. Boček

• Publisher: Elsevier Science
• Year: 1970
• Tongue: English
• Weight: 588 KB
• Volume: 53
• Category: Article
• ISSN: 1873-3778
• DOI: 10.1016/s0021-9673(01)98499-7

✦ Synopsis

The liquid and gas-phase mass-transfer resistance coefficients have been evaluated from HETP versus carrier gas flow velocity (z?) measurements carried out at different absolute column pressure (P) levels. The C, coefficients in the liquid-phase mass-transfer term (C&J), as obtained by measuring the HETP increments of a constant Pfi, were increasing upon raising the pressure level, while the respective Cm coefficients in the gas-phase mass-transfer term (C,J%) displayed a decrease. Both C, and Cm coefficients decreased with increasing carrier gas flow velocity. The above situation indicates that the liquid and gas-phase mass-transfer terms are dependent on eacli other.