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Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

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Multicomponent vapor sorption on active carbon by combined microgravimetry and dynamic sampling mass spectrometry

Fletcher, A.J. and Benham, M.J. and Thomas, K.M. (2002) Multicomponent vapor sorption on active carbon by combined microgravimetry and dynamic sampling mass spectrometry. Journal of Physical Chemistry B, 106 (30). pp. 7474-7482. ISSN 1520-6106

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Abstract

Combined gravimetric and dynamic sampling mass spectrometry methods have been developed for the direct measurement of multicomponent vapor sorption on microporous materials. This method combines the gravimetric method for determination of the kinetics and equilibria of total adsorption, and mass spectrometry for the analysis of each adsorbate component during temperature programmed desorption. Mass spectrometry was also used for the determination of the adsorptive gas-phase concentrations during adsorption. Results are presented for adsorption of water/n-octane and water/n-butane on active carbon BAX950 using helium as the carrier gas. Marked differences were observed in the amount of water vapor adsorbed in the presence of n-butane compared with static water vapor and water vapor in helium. The dynamics of adsorption and desorption resulting from competitive adsorption have been investigated. The kinetics are compared with data for single component adsorption of static vapors and flowing vapors in helium. The results are discussed in terms of the diffusion processes and adsorption mechanism.