title: Evolution of the energetic characteristics of {silicalite-1 + water} repulsive clathrates in a wide temperature range.
abstract: Recently {lyophobic porous powders + liquid} systems were proposed to be used for nontraditional energy storage and conversion purposes. This article reports the experimental study of the mechanical behavior, within the pressure-volume (PV) diagram, of the {hydrophobic silicalite-1 + water} system in the temperature range 10-80 °C. Repeated recordings of PV-isotherms and thermal effects of the repulsive clathrate during successive compression-decompression runs were performed using scanning transitiometry. An unexpected steady decline in the intrusion-extrusion pressure and volume of embedded water was found during the forced (repeated) intrusion of water into the pores of silicalite-1 and its spontaneous extrusion at constant temperature. A discussion of possible reasons of unconventional behavior of these heterogeneous systems as well as a thermodynamic analysis is presented.
authors: Clermont University ENSCCF, Institute of Chemistry of Clermont-Ferrand, Clermont-Ferrand, France.
authors: Oleksii V
authors: OV
authors: Ievtushenko
authors: Valentin A
authors: VA
authors: Eroshenko
authors: Yaroslav G
authors: YG
authors: Grosu
authors: Jean-Marie
authors: JM
authors: Nedelec
authors: Jean-Pierre E
authors: JP
authors: Grolier