scholarly journals Energetic Performance of Pure Silica Zeolites under High-Pressure Intrusion of LiCl Aqueous Solutions: An Overview

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2145
Author(s):  
Giorgia Confalonieri ◽  
T. Jean Daou ◽  
Habiba Nouali ◽  
Rossella Arletti ◽  
Andrey Ryzhikov
Keyword(s):  
High Pressure ◽  
Aqueous Solutions ◽  
Mechanical Energy ◽  
Relative Increase ◽  
Clear Trend ◽  
Pure Silica ◽  
Solvated Ions ◽  
Pore Opening ◽  
And Storage ◽  
Energetic Performance

An overview of all the studies on high-pressure intrusion—extrusion of LiCl aqueous solutions in hydrophobic pure silica zeolites (zeosils) for absorption and storage of mechanical energy is presented. Operational principles of heterogeneous lyophobic systems and their possible applications in the domains of mechanical energy storage, absorption, and generation are described. The intrusion of LiCl aqueous solutions instead of water allows to considerably increase energetic performance of zeosil-based systems by a strong rise of intrusion pressure. The intrusion pressure increases with the salt concentration and depends considerably on zeosil framework. In the case of channel-type zeosils, it rises with the decrease of pore opening diameter, whereas for cage-type ones, no clear trend is observed. A relative increase of intrusion pressure in comparison with water is particularly strong for the zeosils with narrow pore openings. The use of highly concentrated LiCl aqueous solutions instead of water can lead to a change of system behavior. This effect seems to be related to a lower formation of silanol defects under intrusion of solvated ions and a weaker interaction of the ions with silanol groups of zeosil framework. The influence of zeosil nanostructure on LiCl aqueous solutions intrusion–extrusion is also discussed.

scholarly journals Investigation of the energetic performance of pure silica BEC-type zeolite under high pressure water and 20 M LiCl intrusion-extrusion experiments

2017 ◽  
Vol 254 ◽  
pp. 153-159 ◽  
Author(s):  
Laura Ronchi ◽  
Andrey Ryzhikov ◽  
Habiba Nouali ◽  
T. Jean Daou ◽  
Sébastien Albrecht ◽  
...  
Keyword(s):  
High Pressure ◽  
Pure Silica ◽  
Pressure Water ◽  
Type Zeolite ◽  
Energetic Performance

scholarly journals Intrusion–Extrusion of Electrolyte Aqueous Solutions in Pure Silica Chabazite by in Situ High Pressure Synchrotron X-ray Powder Diffraction

2018 ◽  
Vol 122 (49) ◽  
pp. 28001-28012 ◽  
Author(s):  
Giorgia Confalonieri ◽  
Andrey Ryzhikov ◽  
Rossella Arletti ◽  
Habiba Nouali ◽  
Simona Quartieri ◽  
...  
Keyword(s):  
High Pressure ◽  
Aqueous Solutions ◽  
Powder Diffraction ◽  
X Ray ◽  
Pure Silica

Investigation of the Energetic Performance of Pure Silica ITQ-4 (IFR) Zeolite under High Pressure Water Intrusion

2010 ◽  
Vol 114 (26) ◽  
pp. 11650-11658 ◽  
Author(s):  
Mohamed Ali Saada ◽  
Séverinne Rigolet ◽  
Jean-Louis Paillaud ◽  
Nicolas Bats ◽  
Michel Soulard ◽  
...  
Keyword(s):  
High Pressure ◽  
Water Intrusion ◽  
Pure Silica ◽  
Pressure Water ◽  
Energetic Performance

Magmatic evolution of the Gaussberg lamproite (Antarctica): volatile content and glass composition

2004 ◽  
Vol 68 (1) ◽  
pp. 83-100 ◽  
Author(s):  
E. Salvioli-Mariani ◽  
L. Toscani ◽  
D. Bersani
Keyword(s):  
High Pressure ◽  
Infrared Spectra ◽  
Melt Inclusions ◽  
Glass Composition ◽  
Relative Increase ◽  
The Other ◽  
Residual Liquid ◽  
Volatile Content ◽  
Magmatic Evolution ◽  
Ultrapotassic Rock

AbstractThe lamproite of Gaussberg is an ultrapotassic rock where leucite, olivine and clinopyroxene microphenocrysts occur in a glass-rich groundmass, containing microliths of leucite, clinopyroxene, apatite, phlogopite and rare K-richterite.Abundant silicate melt inclusions occur in olivine, leucite and, rarely, in clinopyroxene microphenocrysts. Raman investigations on melt inclusions showed the presence of pure CO2 in the shrinkage bubbles. On the other hand, the glass of the groundmass is CO2-poor and contains up to 0.70 wt.% of dissolved H2O, as estimated by infrared spectra. It is inferred that CO2 was released at every stage of evolution of the lamproite magma (CO2-rich shrinkage bubbles), whereas H2O was retained for longer in the liquid. At Gaussberg, CO2 seems to have a major role at relatively high pressure where it favoured the crystallization of H2O-poor microphenocrysts; the uprise of the magma to the surface decreased the solubility of CO2 and caused a relative increase in water activity. As a consequence, phlogopite and K-richterite appeared in the groundmass.The glass composition of both the groundmass and melt inclusions suggests different evolutions for the residual liquids of the investigated samples. Sample G886 shows the typical evolution of a lamproite magma, where the residual liquid evolves toward peralkaline and Na-rich composition and crystallizes K-richterite in the latest stage. Sample G895 derives from mixing/mingling of different batches of magma; effectively glasses from melt inclusions in leucite and clinopyroxene are more alkaline than those found in early crystallized olivine. Leucite and clinopyroxene crystallized early from a relatively more alkaline batch of lamproite magma and, successively, a less alkaline, olivinebearing magma batch assimilated them during its rise to the surface.

scholarly journals Effect of Cutting and Storage on Acetate and Nonacetate Esters in Convenient, Ready-to-eat Fresh-cut Melons and Apples

HortScience ◽  
2006 ◽  
Vol 41 (1) ◽  
pp. 65-73 ◽  
Author(s):  
John C. Beaulieu
Keyword(s):  
Relative Increase ◽  
The Other ◽  
Relative Decrease ◽  
Other Hand ◽  
Different Seasons ◽  
Postharvest Life ◽  
Fresh Cut ◽  
Harvest Regimes ◽  
And Storage ◽  
Volatile Esters

Examples from various harvest regimes, storage regimes, cultivars and different packaging methods are presented to characterize volatile ester differences after cutting and how changes occur in characteristic flavors throughout the postharvest life of certain cut fruit products. In many fresh-cut cantaloupe cultivars and in honeydew, there was a relative increase in nonacetates and coinciding relative decrease in acetates during storage. A similar and consistent nonacetate:acetate ester ratio was conserved in cantaloupe from eastern and western U.S. regions, as well as different cultivars from the same field. Furthermore, similar ratios were observed in many melon cultivars over multiple years from different seasons and growing regions. Since many cultivars exhibited similar trends in 2-year repeated studies, the trend is apparently independent of year and season. Fresh-cut `Gala' apples, on the other hand, displayed a slightly different trend whereby both acetates and nonacetate esters decreased appreciably during storage. The hypothesis is put forward that recycling of esters during storage in certain fresh-cut fruits disturbs the delicate fine balance of characteristic volatiles. Consistently decreasing acetates along with increasing nonacetates could alter the overall perceived desirable flavor attributes during fresh-cut melon storage, even though volatile esters are still abundant.

Absorption of Mechanical Energy via Formation of Ice Nanotubes in Zeolite

2021 ◽  
Author(s):  
Kenji Mochizuki
Keyword(s):  
Molecular Dynamics ◽  
Molecular Dynamics Simulations ◽  
Heterogeneous System ◽  
Mechanical Energy ◽  
Bulk Water ◽  
Pure Silica ◽  
Dynamics Simulations ◽  
First Time

Abstract Molecular dynamics simulations are carried out for a heterogeneous system composed of bulk water and pure-silica zeolites of the AFI type. Our simulations show, for the first time, the...

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