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Calculation of Standard Thermodynamic Potentials for Na-Zeolites with the Use of Linear Programming Problems
Na-Zeolites Standard Thermodynamic Potentials Linear Programming
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2013/3/7
Linear programming problems for Na-Al-Si-O-H system have been formulated and solved for calculations of standard enthalpies and Gibbs potentials of zeolites with unknown thermodynamic properties. The ...
Decolorization of KN-R catalyzed by Fe-containing Y and ZSM-5 zeolites
Catalytic decolorization Anthraquinone dye Fe-containing zeolite Heterogeneous Fenton-like oxidation
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2013/12/12
Decolorization of an anthraquinone dye, Reactive Brilliant Blue KN-R by hydrogen peroxide was examined using Fe-containing Y and ZSM-5 zeolites as heterogeneous catalysts. Catalysts were prepared by i...
Propylene Dimerization Over Nickel-Ion Exchanged Zeolites in the Liquid Phase
Propylene Dimerization Over Nickel-Ion Exchanged Zeolites in the Liquid Phase
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2010/4/22
Propylene Dimerization Over Nickel-Ion Exchanged Zeolites in the Liquid Phase.
Iron Influence in the Aluminosilicate Zeolites Synthesis
Al Coordination Iron Influence Kaolin Zeolite Synthesis
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2011/12/8
Abstract: The level of Fe impurities in 2 well-crystallized kaolinites was modified (by addition or chemical removal treatment) to analyze the Fe influence in the aluminosilicate zeolite synthesis.The...
Solubility and stability of zeolites in aqueous solution: I. Analcime, Na-, and K-clinoptilolite
Solubility stability zeolites I. Analcime K-clinoptilolite
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2012/3/31
The solubilities of analcime and clinoptilolite were determined in dilute, weakly alkaline,aqueous solutions below 300 8 C and at vapor-saturated pressures. Analcimes used in this study were from Mont...
Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite
Crystal structure-crystal chemistry relationships zeolites erionite offretite
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2012/3/31
This study clarifies the crystal structure variations and relationships in the zeolites eri-onite and offretite. The crystal structure analyses used Rietveld analysis of X-ray powder diffraction data,...
Crystal chemistry of the zeolites erionite and offretite
Crystal chemistry zeolites erionite offretite
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2012/3/31
Many known occurrences of the zeolites erionite and offretite have been characterized by electron probe microanalysis, X-ray powder diffraction, and optical microscopy. For the first time, a substanti...
Diagenesis of Oligocene Vitric Tuffs to Zeolites, Mexican Volcanic Belt
Diagenesis Oligocene Vitric Tuffs Zeolites
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2011/12/23
Abstract: Sedimentary zeolites clinoptilolite, mordenite and erionite occur as diagenetic products of ash falls of rhyolitic composition from the Oligocene Chichindaro Formation at the limits of the M...
Thermochemistry and phase equilibria in calcium zeolites
Thermochemistry phase equilibria calcium zeolites
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2012/4/6
Thermodynamic properties ofthe natural calcium zeolites laumontite, leonhardite, de-hydrated leonhardite (metaleonhardite), wairakite, and yugawaralite werestudied bycal-orimetry in lead borate solven...
Phase changes and amorphization of zeolites at high pressures: The case of scolecite and mesolite
Phase changes amorphization of zeolites high pressures scolecite mesolite
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2012/4/6
Pressure-induced amorphous-phase transitions (amorphization) have been observed in framework silicates like quartz and feldspars. Asimilar crystalline to highly disordered solid phase transition is re...
Zeolites in Pre-Caldera Pyroclastic Rocks of the Santorini Volcano, Aegean Sea, Greece
Clinoptilolite Diagenesis Mordenite Pyroclastic Tuff Zeolite
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2012/1/6
The vitric matrix of pre-caldera acid tuff and tuff breccia of the Santorini volcano, Aegean Sea, Greece has been generally replaced by one or more of the following authigenic minerals: K-rich and (K,...
Hypothetical Structures of Magadiite and Sodium Octosilicate and Structural Relationships Between the Layered Alkali Metal Silicates and the Mordenite- and Pentasil-Group Zeolites
Alkali metal silicate Bikitaite Crystal structure Dachiardite Epistilbite Infrared spectroscopy Magadiite Mordenite Nuclear magnetic resonance
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2012/1/9
Hypothetical model structures for magadiite and sodium octosilicate, based on the structure of the zeolite dachiardite, are proposed that consist of layers of 6-member rings of tetrahedra and blocks c...
Zeolites in Eocene Basaltic Pillow Lavas of the Siletz River Volcanics, Central Coast Range, Oregon
Analcime Apophyllite Isotope abundance Laumontite Mesolite Pillow lava Smectite Zeolites
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2012/1/13
Zeolites and associated minerals occur in a tholeiitic basaltic pillow lava sequence that makes up part of the Eocene Siletz River Volcanics in the central Coast Range, Oregon. Regional zoning of zeol...
Synthesis and Characterization of Zeolites in the System Na2O-K2O-Al2O3-SiO2-H2O
Gobbinsite Merlinoite Phillipsite Saline Alkaline lake Synthesis Zeolite Pt Zeolite W Zeolite ZK-19
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2012/2/6
Zeolites having the structures of phillipsite, merlinoite, and gobbinsite were synthesized from clear solutions at 80°C in the system Na2O-K2O-Al2O3-SiO2-H2O and their morphologies, cell parameters, a...
Alteration of Clay Minerals and Zeolites in Hydrothermal Brines
Backfill Bentonite Cesium Clinoptilolite Hydrothermal Mordenite Salt repository Smectire Strontium Vermiculite Zeolite
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2012/2/7
Clay minerals and zeolites, candidate backfill minerals for nuclear waste repositories, were treated with saturated NaCl brine and Mg-rich (Mg-Ca-Na-K) brine at 200∑C and 300∑C for 4 weeks under a con...