Heterogeneous lyophobic systems based on pure silica ITH-type zeolites: high pressure intrusion of water and electrolyte solutions

• Published in: New journal of chemistry Vol. 41; no. 24; pp. 15087 - 15093
• Main Authors: Ronchi, L., Nouali, H., Daou, T. J., Patarin, J., Ryzhikov, A.
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 2017; Royal Society of Chemistry [1987-....]
• Subjects: Aqueous solutions; Chemical Sciences; Extrusion; Intrusion; Lithium chloride; NMR; Nuclear magnetic resonance; Silicon dioxide; Zeolites
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/C7NJ03470A

The energetic performances of pure silica ITH-type zeolites were studied by high pressure intrusion–extrusion in water and LiCl aqueous solutions at different concentrations. When pure water was intruded, a bumper behavior was exhibited with an intrusion pressure of 82 MPa and an absorbed energy of 6.6 J g −1 . Changing the intruded liquid from water to LiCl aqueous solutions, an increase of the intrusion pressure was observed with 119, 175 and 280 MPa for 5 M, 10 M and 20 M LiCl aqueous solutions, respectively. The energy that the latter system could absorb (30.8 J g −1 ) was among the highest ever reported. A change in the behavior with LiCl concentration was also observed. The “ITH-type zeosil–20 M LiCl solution” system demonstrated a combination of bumper and shock-absorber behaviors, whereas a bumper behavior was displayed for water and the other LiCl aqueous solutions. All the zeolite samples were characterized before and after intrusion–extrusion experiments (XRD, SEM, N 2 adsorption–desorption, TG and NMR analysis) in order to understand the influence of LiCl concentration on the “zeosil–liquid” system behavior.