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Showing 1 to 11 of 11 for “"Faujasite"”.
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Ab initio molecular dynamics simulations of lanthanide coordination structures in water and in faujasite
… increases the hydrothermal stability of faujasite in cracking catalysts, as well as in cation exchange in faujasite. The structures of the lanthanide aqua ions were resolved with density functional theory calculations and ab initio molecular dynamics (AIMD) simulations within ~0.05 Å of …
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The effect of metal ion exchange and alkali metal doping on the electrical conductivity of the Faujasite-type zeolite 13X
Zeolite 13X was synthesized in the sodium form. Some transition metal cations were introduced into the zeolite framework by ion exchange reactions. These different cationic zeolite forms were doped or impregnated with sodium metal, utilizing the adsorptive properties of the zeolite. An A.C. …
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An Experimental and Numerical Study on Metakaolin-based Geopolymers
… Three different types of zeolite seeds (hydrogen faujasite, sodium faujasite, mordenite) were used. The results showed that all the zeolites could improve the strength of GPs although hydrogen faujasite and mordenite seemed to be more effective than sodium faujasite.
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Molecular dynamics simulation of penetrant transport in composite poly (4-methyl-2-pentyne) and nanoparticles of different types
… PMP. Silica has different crystalline form. In faujasite silica, there are pores that are large enough to allow penetrants to pass through, while in cristobalite silica, the Si and O atoms are densely packed and there are no pores that penetrants can pass through. The transport properties of …
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Base catalysis by alkali modified zeolites
… properties of various alkali exchanged, faujasite-type zeolites are explored. It is found that upon impregnation of CsNaY with cesium hydroxide or cesium acetate, acetone production (normally attributed to base sites) is promoted by an order of magnitude above the untreated (not …
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Reaction of meta-diisopropylbenzene on acid molecular sieves and synthesis of zeolites by a vapor phase transport method
… mordenite, offretite, beta, hexagonal and cubic faujasite (hex and FAU), L, SAPO-37, and an amorphous silica-alumina at temperatures around 463 K in a flow-type fixed-bed reactor. A small amount of cracking is observed. The main reactions of meta-diisopropylbenzene are isomerization and …
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Oxidation Chemistries Over Catalysts Containing M-N4 Active Sites
… complexes can be housed within the supercages of faujasite zeolites (MPC@FAU), creating a hybrid catalyst. This dissertation comprises an integrated synthesis, structure, and function study of MPC@FAU catalysts compared to more heterogeneous metal-nitrogen doped carbons (M-N-C). CoF16PC@FAU …
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High throughput optical materials
… formation of analcime, sodalite, zeolite A and faujasite. All materials were characterised using powder x-ray diffraction.<br/>The thermal conversion of zeolite A and sodium chloride into sodalite has been studied using combined TGA and DTA analysis and time resolved powder neutron diffraction …
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Synthesis of zeolites from geological materials and industrial wastes for potential application in environmental problems
… LTA (LTA), sodalite (SOD), cancrinite (CAN), faujasite (FAU), zeolite Na-P1 (GIS), JBW-type zeolite (JBW), analcime (ANA), whereas the activation of KAO in KOH solutions produced chabazite (CHA), zeolite Barrer-KF, phillipsite (PHI) and K-feldspar. The hydrothermal conversion of kaolinite in …
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Θεωρητική και πειραματική μελέτη της απόκρισης ζεολίθων σε μεταβολές θερμοκρασίας, πίεσης και συγκέντρωσης ροφημένων ουσιών
Οι ζεόλιθοι ανήκουν στα νανοπορώδη υλικά ή αλλιώς και μοριακά κόσκινα. Βρίσκουν δε εφαρμογή σε πληθώρα εφαρμογών, καλύπτοντας ένα μεγάλο θερμοκρασιακό φάσμα. Η γνώση της απόκρισής τους κατά τις μεταβολές της θερμοκρασίας είναι καθοριστικής σημασίας για την αποδοτικότητά τους, ακόμα περισσότερο όταν …
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Μελέτη της δομής των πρωτονιωμένων ιοντικών υγρών με χρήση δονητικής φασματοσκοπίας
Τα ιοντικά υγρά (ΙΥ) έχουν κερδίσει το ενδιαφέρον των ερευνητών, λόγω των εξαιρετικών ιδιοτήτων τους σε εφαρμογές κατάλυσης, ηλεκτροχημείας, σύνθεσης και αναλυτικής χημείας καθώς και σε μεθόδους διαχωρισμού. Πρόκειται για ιοντικές ενώσεις που αποτελούνται από οργανικά κατιόντα και οργανικά/ανόργανα …