Sorption and isomerization of cyclopropane on synthetic Faujasite by pulse techniques
Thesis/Dissertation
·
OSTI ID:6461650
Diffusion coefficients for cyclopropane and propylene on LiY, NaY, and KY zeolites at 30/sup 0/-55/sup 0/C were 1.3-5.0 x 10/sup -//sup 16/ sq m/sec, and the diffusional resistance for both gases increased in the order KY < NaY < LiY. The activation energies for diffusion were 2.0-3.7 kcal/mole for cyclopropane and 3.3-6.2 kcal/mole for propylene and increased in the order KY < NaY < LiY. Heats of adsorption were 6.1-9.3 kcal/mole and increased in the above mentioned order. The sorption capacity was 31-48 molecules per unit cell and was highest for cyclopropane on LiY zeolite. A mathematical model describing the transient behavior of a continuous-stirred tank reactor (CSTR) was applied to cyclopropane isomerization to propylene over these zeolites at 225/sup 0/-275/sup 0/C. KY was inactive, and LiY was more active than NaY. The activation energies were 16.7 kcal/mole for LiY and 23.5 kcal/mole for NaY. The intracrystalline diffusion coefficient from the CSTR method was 1.4-3.2 x 10/sup -//sup 15/ sq m/sec.
- OSTI ID:
- 6461650
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACTIVATION ENERGY
ADSORPTION HEAT
ALKANES
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CHEMICAL REACTORS
CYCLOALKANES
DATA
DIFFUSION
ENERGY
ENTHALPY
EXPERIMENTAL DATA
FAUJASITE
GASEOUS DIFFUSION
HYDROCARBONS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOMERIZATION
MATERIALS
MATHEMATICAL MODELS
MINERALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
PROPANE
PULSE TECHNIQUES
SILICATE MINERALS
SORPTION
THERMODYNAMIC PROPERTIES
ZEOLITES
400201 -- Chemical & Physicochemical Properties
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ACTIVATION ENERGY
ADSORPTION HEAT
ALKANES
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CHEMICAL REACTORS
CYCLOALKANES
DATA
DIFFUSION
ENERGY
ENTHALPY
EXPERIMENTAL DATA
FAUJASITE
GASEOUS DIFFUSION
HYDROCARBONS
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
ISOMERIZATION
MATERIALS
MATHEMATICAL MODELS
MINERALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PHYSICAL PROPERTIES
PROPANE
PULSE TECHNIQUES
SILICATE MINERALS
SORPTION
THERMODYNAMIC PROPERTIES
ZEOLITES