Determination of external surface areas of zeolites
Journal Article
·
· J. Catal.; (United States)
The external surface areas of NaA, CaA, H mordenite, NaX, and NaY zeolites were determined from the amounts of nitrogen adsorbed at 77 K on zeolites, after their internal pores had been filled previously with water, ethane, propane, butane, or 2,2-dimethylpropane by adsorption. The amount of nitrogen adsorbed was measured with a temperature-compensated tensimeter having symmetrical design. When the change in the pressure due to the adsorption of nitrogen on the zeolite previously filled with a filling substance stopped in a short while, the linear BET plot was obtained and the monolayer volume of nitrogen adsorbed on the external surface of zeolite was evaluated from the BET plot (the filled-pore method). When the pressure due to the adsorption of nitrogen on the zeolite changed slowly, the monolayer volume of nitrogen adsorbed on the external surface was evaluated from the amount of nitrogen adsorbed rapidly on the zeolite (the adsorption kinetic method).
- Research Organization:
- Utsunomiya Univ., Japan
- OSTI ID:
- 5502547
- Journal Information:
- J. Catal.; (United States), Journal Name: J. Catal.; (United States) Vol. 100:1; ISSN JCTLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020400 -- Petroleum-- Processing
090121 -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
CATALYSTS
DATA
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LOW TEMPERATURE
MATERIALS
MINERALS
NITROGEN
NONMETALS
NUMERICAL DATA
SORPTION
SORPTIVE PROPERTIES
SURFACE AREA
SURFACE PROPERTIES
ZEOLITES
020400 -- Petroleum-- Processing
090121 -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ADSORPTION
CATALYSTS
DATA
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LOW TEMPERATURE
MATERIALS
MINERALS
NITROGEN
NONMETALS
NUMERICAL DATA
SORPTION
SORPTIVE PROPERTIES
SURFACE AREA
SURFACE PROPERTIES
ZEOLITES