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Abstract
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Due to importance of gas adsorption process in diverse fields of science
and necessity of applying carbon nanotubes in chemical processes,
thermodynamics modeling of binary gas adsorption equilibria for CO2,
CH4, CO and N2 over some typical carbon nanotubes is investigated.
Hence, pure adsorption isotherms of CO2, CH4, CO and N2 on various
types of carbon nano tubes were selected from literature data and their
binary adsorption is predicted using Sips isotherm model combining ideal
adsorbed solution model. Furthermore, isosteric heats of adsorption are
predicted using an equation derived from Sips model. Binary adsorption of
the studied systems is characterized using equilibrium x-y diagrams and
selectivity curves. Finally effect of temperature and pressure on the
selectivity of the considered systems is discussed. The obtained results
show that, carbon nanotubes could be applied as a selective adsorbent to
separate all the investigated systems.
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