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

A.J. Fletcher, M.J. Benham, K.M. Thomas

Research output: Contribution to journalArticle

22 Citations (Scopus)

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.
LanguageEnglish
Pages7474-7482
Number of pages8
JournalJournal of Physical Chemistry B
Volume106
Issue number30
DOIs
Publication statusPublished - Aug 2002

Fingerprint

sorption
Mass spectrometry
Sorption
mass spectroscopy
Carbon
sampling
Vapors
vapors
Sampling
Adsorption
adsorption
carbon
Helium
Steam
Water vapor
water vapor
helium
Butane
butanes
Gases

Keywords

  • multicomponent vapor sorption
  • vapors
  • active carbon
  • microgravimetry
  • dynamic sampling
  • mass spectrometry
  • chemical engineering

Cite this

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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.",
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Multicomponent vapor sorption on active carbon by combined microgravimetry and dynamic sampling mass spectrometry. / Fletcher, A.J.; Benham, M.J.; Thomas, K.M.

In: Journal of Physical Chemistry B, Vol. 106, No. 30, 08.2002, p. 7474-7482.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Multicomponent vapor sorption on active carbon by combined microgravimetry and dynamic sampling mass spectrometry

AU - Fletcher, A.J.

AU - Benham, M.J.

AU - Thomas, K.M.

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N2 - 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.

AB - 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.

KW - multicomponent vapor sorption

KW - vapors

KW - active carbon

KW - microgravimetry

KW - dynamic sampling

KW - mass spectrometry

KW - chemical engineering

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