Abstract
Isoconversional kinetic analysis is applied to thermogravimetry data on vaporization of n-decane and dimethyl sulfoxide from alumina nanopores and bulk. For bulk vaporization, the isoconversional activation energy is independent of conversion and equal to the enthalpy of vaporization. For vaporization from nanopores, the isoconversional activation energy varies strongly with conversion, passing through a minimum at midrange conversions. This behavior is shown to be consistent with the successive transition of the rate control from the Kelvin effect to Knudsen diffusion, and eventually to surface diffusion. All three phenomena are demonstrated to have their specific activation energies. It has been determined that the deceleration of vaporization from nanopores is due to a dramatic decrease in the value of the preexponential factor. The decrease is linked to the high frequency of collisions with the pore walls and to a possibility of adsorption on the walls.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
