Kinetics of non‐isothermal sorption in molecular sieve crystals
作者:
Douglas M. Ruthven,
Lap‐Keung Lee,
Hayrettin Yucel,
期刊:
AIChE Journal
(WILEY Available online 1980)
卷期:
Volume 26,
issue 1
页码: 16-23
ISSN:0001-1541
年代: 1980
DOI:10.1002/aic.690260104
出版商: American Institute of Chemical Engineers
数据来源: WILEY
摘要:
AbstractA mathematical model is developed to describe non‐isothermal sorption kinetics and used to interpret experimental uptake curves for CO2in 4A zeolite and for CO2and in C5H12in 5A zeolite. The model assumes that the dominant mass transfer resistance is intracrystalline diffusion while the major resistance to heat transfer is the external heat transfer between the adsorbent sample and the surroundings. It gives a good representation of the kinetic behavior over a wide range of conditions. Both the extreme cases of isothermal diffusion and complete heat transfer control are demonstrated experimentally. Intermediate situations, in which the uptake rate is controlled by the combined effects of diffusion and heat transfer, are demonstrated as well. The parameters derived from the model are consistent, reproducible, and agree well witha prioriestimates. The model provides a useful theoretical basis for the analysis of rapid sorption processes for which the non‐isothermal approximation is inva
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