Sorption of benzene in CeNaY zeolite under catalytic conditions

Journal Article · Mon Dec 01 04:00:00 EST 1986 · J. Catal.; (United States)

DOI:https://doi.org/10.1016/0021-9517(86)90165-X· OSTI ID:5536426

Choudhary, V R; Srinivasan, K R

Sorption isotherms of benzene in CeNaY (Ce/sup 3 +/-exchange: 72%) and in the same zeolite with its stronger acid sites poisoned with pyridine were obtained in the temperature range 463-623 K by the gas chromatographic pulse technique using the peak maximum method. The sorption data could be fitted well to the Langmuir type sorption equation. The isosteric heats of sorption at different sorbate loadings were evaluated from the sorption data. The heat of sorption at near zero intracrystalline sorbate concentration was obtained separately by gas chromatographic techniques. Temperature-programmed desorption (TPD) of benzene from the zeolite under chromatographic conditions at different initial sorbate loadings were also investigated. The poisoning of the stronger acid sites of the zeolite has resulted in a very significant decrease in the extent of sorption and in the heat of sorption, indicating the involvement of the acid sites in the sorption. The variation of the isosteric heat of sorption with the sorbate loading, the TPD data and the analysis of pressure derivatives of the sorption clearly show the presence of site energy distribution in the zeolite.

• Research Organization: National Chemical Lab., Pune, India
• OSTI ID: 5536426
• Journal Information: J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 102:2; ISSN JCTLA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
ADSORPTION HEAT
ADSORPTION ISOTHERMS
ALKALI METALS
AROMATICS
AZINES
BENZENE
CATALYSTS
CATALYTIC CRACKING
CERIUM
CHEMICAL REACTIONS
CHROMATOGRAPHY
CRACKING
DECOMPOSITION
DESORPTION
ELEMENTS
ENTHALPY
GAS CHROMATOGRAPHY
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOTHERMS
MATERIALS
METALS
MINERALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PHYSICAL PROPERTIES
POISONING
PYRIDINE
PYRIDINES
PYROLYSIS
RARE EARTHS
SEPARATION PROCESSES
SODIUM
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
YTTRIUM
ZEOLITES