High-temperature low-pressure adsorption of branched C(sub 5)-C(sub 8) alkanes on zeolite beta, ZSM-5, ZSM-22, zeolite Y, and mordenite

Article Abstract:

The high-temperature, low-pressure adsorption of branched C(sub 5)-C(sub 8) alkanes on zeolite beta, ZSM-5, ZSM-22, zeolite Y and mordenite was investigated using tracer and perturbation chromatographic methods. Specifically, Henry constants, van't Hoff preexponential factors, low-coverage adsorption enthalpies and separation factors of the alkanes were analyzed. Three different adsorption behaviors were discovered depending on the type of the zeolite. In addition, linear and mono- and multibranched alkanes can be separated on columns of ZSM-22 and beta zeolites.

Molecular dynamics

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Chromatographic study of adsorption of n-alkanes on zeolites at high temperatures

Article Abstract:

The adsorption thermodynamics of linear alkanes in the C5-C10 range between the temperatures of 200 to 375 degrees Centigrade on different types of zeolites was studied using the chromatographic method. The method facilitated the determination of adsorption properties at extremely low surface coverage and high temperatures. The interaction among zeolite topology, carbon number, Henry constants and silicon-aluminum ratio at relative high temperatures was examined using the chromatographic technique.

Usage, Chromatography

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Packing effects in the liquid-phase adsorption of C5-C22 n-alkanes on ZSM-5

Article Abstract:

The adsorption of C5 to C14 n-alkanes from liquid phase, which leads to high zeolite loading, was studied using CB-GCMC calculations. The mechanism of packing in liquid was studied and the probability of bending and crossing in the intersections increases with chain length, leads to a good packing of long-chain alkanes and short alkanes tend to stay away from the intersections, resulting in a lower packing density.

Science & research, All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Zeolites

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