Separation of oxygen and nitrogen due to the controlled pore-opening size of chemical vapor deposited zeolite A

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Industrial and Engineering Chemistry Research; (United States)

DOI:https://doi.org/10.1021/ie00049a006· OSTI ID:6072276

Niwa, M; Yamazaki, K; Murakami, Y ^[1]

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1. Dept. of Synthetic Chemistry, School of Engineering, Nagoya Univ., Furo-cho, Chikusa-ku, Nagoya 464-01 (JP)

This paper reports on Zeolite A modified by the CVD (chemical vapor deposition) method where silicon methoxide was deposited only on the external surface of the zeolite in order to control the pore-opening size. The chemical vapor deposited zeolite A adsorbed oxygen in preference to nitrogen because of the controlled pore-opening size. This behavior for the adsorption of oxygen and nitrogen was inverse to that usually observed on zeolite A, and separation of gas due to the molecular size was obtained. Upon deposition of silica, the rate of sorption changed, the sorption capacity being kept a constant. Suppression of sorption by the deposited silica depended upon the deposition amount. For small deposition, the degree of suppression for oxygen and nitrogen was smaller than for argon and krypton due to the smaller effective sizes, while for large deposition the former was larger than the latter, probably due to the loss of kinetical motion of diatomic molecules upon adsorption.

• OSTI ID: 6072276
• Journal Information: Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 30:1; ISSN IECRE; ISSN 0888-5885
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360601* -- Other Materials-- Preparation & Manufacture
360602 -- Other Materials-- Structure & Phase Studies
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
ADSORPTION
ALGAE
CHEMICAL COATING
CHEMICAL VAPOR DEPOSITION
CHROMOPHYCOTA
DEPOSITION
DIATOMS
ELEMENTS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
MATERIALS
MINERALS
MORPHOLOGY
NITROGEN
NONMETALS
OXYGEN
PARTICLE SIZE
PLANTS
SILICATE MINERALS
SIZE
SORPTION
SORPTIVE PROPERTIES
SURFACE COATING
SURFACE PROPERTIES
ZEOLITES