Adsorption of acetaldehyde, propionaldehyde, and butyraldehyde on molecular sieve 13X

Journal Article · Tue Jan 01 04:00:00 EST 1991 · Separation Science and Technology; (United States)

DOI:https://doi.org/10.1080/01496399108050505· OSTI ID:5470108

Ghosh, T K; Hines, A L ^[1]

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1. Univ. of Missouri, Columbia (USA)

One method of removing air pollutants from both indoor and outdoor air is to adsorb them in porous materials, such as silica gel, molecular sieve, and activated carbon. Adsorption isotherms for acetaldehyde, propionaldehyde, and butyraldehyde on Davison molecular sieve 13X were determined gravimetrically at three temperatures. The isoteric heat of adsorption of acetaldehyde and propionaldehyde decreased initially with the increase in loading, then increased up to a certain point after which it decreased again. For butyraldehyde the heat of adsorption initially increased and then decreased with increased loading. The equilibrium adsorption data reduce to a single characteristic curve when correlated according to Polanyi's potential theory. Recently proposed isotherm equations for heterogeneous surfaces by Sircar and Hines et al. were used to correlate the isotherm data. The BET equation gave a good correlation of the data for a relative pressure range of 0.05 {<=} P/P{sub s} {<=} 0.25. The monolayer surface coverage and surface area were calculated by the Langmuir and the BET equations. The Langmuir equation consistently provided a larger estimate of the surface area than did the BET equation.

• OSTI ID: 5470108
• Journal Information: Separation Science and Technology; (United States), Journal Name: Separation Science and Technology; (United States) Vol. 26:7; ISSN SSTED; ISSN 0149-6395
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring &amp; Transport-- (1990-)
ACETALDEHYDE
ACTIVATED CARBON
ADSORBENTS
ADSORPTION
ADSORPTION HEAT
ADSORPTION ISOTHERMS
AIR POLLUTION
AIR POLLUTION CONTROL
ALDEHYDES
CARBON
COMPARATIVE EVALUATIONS
CONTROL
DATA
DESORPTION
ELEMENTS
ENTHALPY
EQUATIONS
EQUILIBRIUM
EVALUATION
EXPERIMENTAL DATA
INDOOR AIR POLLUTION
INFORMATION
ISOTHERMS
MOLECULAR SIEVES
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
PERFORMANCE TESTING
PHYSICAL PROPERTIES
POLLUTION
POLLUTION CONTROL
SILICA GEL
SORPTION
SURFACE AREA
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TESTING
THERMODYNAMIC PROPERTIES