Effects of dilution of poly(ethylvinylbenzene-divinylbenzene) adsorbent on the adsorption of aliphatic, alicyclic, and aromatic hydrocarbon adsorbates from effective zero to finite surface coverage

Journal Article · Fri Jan 15 00:00:00 EST 1988 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00153a006· OSTI ID:7149092

Djordjevic, N M; Laub, R J

The chromatographic measurement and systematic interpretation of the solidgas partition coefficients K/sub s/ and related thermodynamic properties of a number of hydrocarbon adsorbates (n-pentane through n-octane, cyclohexane, methylcyclohexane, benzene, dichloromethane, chloroform, carbon tetrachloride, tetrahydrofuran, thiophene, and acetone) at effective zero surface coverage with a 1:10 admixture of the title adsorbent-inert diluent from 393 to 443 K are reported. Despite a difference of an order of magnitude in the surface areas of bulk and admixed packings, the adsorbate relative retentions were in good agreement with those found in previous work with neat Porapak Q. The heats of adsorption also coincided to within an experimental error of ca. +- 5%. The GSC technique of elution by characteristic point was then used to derive the finite-concentration adsorption isotherms and isosteric heats of adsorption on n-hexane, cyclohexane, benzene, carbon tetrachloride, and acetone adsorbates with diluted Porapak Q over the temperature range 393-433 K. All exhibited BET Type IV isotherms, as well as changes in the respective isotherm temperature coefficients. The latter is said to be a consequence of the microporous substructure of this adsorbent.

• Research Organization: San Diego State Univ., CA (USA)
• OSTI ID: 7149092
• Journal Information: Anal. Chem.; (United States), Vol. 60:2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ACETONE
ADSORPTION
GAS CHROMATOGRAPHY
THERMODYNAMIC PROPERTIES
ALKANES
BENZENE
SORPTIVE PROPERTIES
CARBON TETRACHLORIDE
CHLOROFORM
CYCLOALKANES
TETRAHYDROFURAN
THIOPHENE
VINYL MONOMERS
EXPERIMENTAL DATA
HIGH TEMPERATURE
MEDIUM TEMPERATURE
POLYMERS
QUANTITATIVE CHEMICAL ANALYSIS
SPATIAL DISTRIBUTION
THERMODYNAMICS
AROMATICS
CHEMICAL ANALYSIS
CHLORINATED ALIPHATIC HYDROCARBONS
CHROMATOGRAPHY
DATA
DISTRIBUTION
FURANS
HALOGENATED ALIPHATIC HYDROCARBONS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
INFORMATION
KETONES
MONOMERS
NUMERICAL DATA
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PHYSICAL PROPERTIES
SEPARATION PROCESSES
SORPTION
SURFACE PROPERTIES
400102* - Chemical & Spectral Procedures
400201 - Chemical & Physicochemical Properties