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Showing 1 to 14 of 14 for “"SSZ"”.
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Reaction and Transport Coupling in Multi-Functional Catalysts for Selective Oxidation of Ammonia to Nitrogen
… a bottom layer of Pt/Al2O3 and a top layer of Cu/SSZ-13. As emission control catalysts experience degradation under the severe operating conditions which can negatively impact the product distribution and conversion. The first part of this dissertation study elucidates the effect of hydrothermal …
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Fundamental studies on copper zeolites for catalytic NO x abatement
… show commercially viable SCR performance. Cu-SSZ-13 (CHA framework), a member of this family, is a preferred catalyst for SCR applications because it shows exceptional hydrothermal stability in addition to commercially viable SCR performance. Our work focuses on 1) determination of the active …
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Monazite Geochronology of the Madison Mylonite Zone and Environs, Southwestern Montana: With Implications for Precambrian Thermotectonic Evolution of the Northern Wyoming Province
… monazite growth throughout the Snowy shear zone (SSZ) and the Madison mylonite zone (MMZ), South Madison Range, Montana. Comparison of U-Pb and U-Th-Pb ages yielded by monazite grains from both shear zones and zircon rims from SSZ, a new timing for major SE-directed thrusting and formation of the …
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Exploring the Mechanistic Landscape of Nitric Oxide Oxidation and Ammonia Selective Catalytic Reduction of Nitric Oxide on Cu-Zeolites via Kinetic and Spectroscopic Characterization
… requirements. Small-pore Cu- and Fe-exchanged SSZ-13 catalysts with chabazite (CHA) topology are able to sustain high catalytic rates for selective catalytic reduction (SCR) even after exposure to harsh hydrothermal conditions present in diesel exhaust. Probing the redox behavior and the active …
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Spectroscopic and Kinetic Study of Copper-Exchanged Zeolites for the Selective Catalytic Reduction of NOx with Ammonia
… emission standard goals. Copper-exchanged SSZ-13 (Cu-SSZ-13), the small-pore zeolite in this study, has been shown to be very hydrothermally stable and active under conditions presented in the exhaust of the lean-burn diesel engine. In this work, detailed studies were performed to identify …
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Untersuchungen zum in vivo Differenzierungspotenzial muriner und humaner hämatopoetischer sowie muriner neuraler Stammzellen
… In der vorliegenden Arbeit wurde untersucht, ob SSZ tatsächlich auf die Bildung von Zellen ihres Stammzellkompartiments beschränkt sind. Dazu wurden drei verschiedene Stammzelltypen, murine hämatopoetische und humane HSZ sowie murine NSZ in murine Präimplantationsblastozysten injiziert. Da dies …
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Aromatization of n-hexane by platinum containing molecular sieves and distribution and motion of organic guest molecules in zeolites
… BaKL, KBaKL, NaY, CsNaY, FAU, EMT, ZSM-12 and SSZ-24) and aluminophosphate (AIP0₄-5 and VPI-5) molecular sieves. ¹³C MAS NMR, TEM and H₂ chemisorption measurements reveal that Pt can be loaded into the micropores of molecular sieves with both charged and neutral frameworks. Pt containing …
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Climate Variability and Farm-households in the Sudan Savannah Zone of Ghana
… by smallholder farmers. The Sudan Savannah Zone (SSZ) of Ghana, a zone that experiences and has rain-fed agriculture as the predominant livelihood source, presents an excellent lens through which this knowledge contribution can be explored. There is ample evidence suggesting that rural …
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First-principles molecular modeling of structure-property relationships and reactivity in the zeolite chabazite
… were calculated on a periodic chabazite (SSZ-13) model with various loadings of acid sites per unit cell, and with various structural framework defects. The four acidic oxygens at the aluminum T-site were found to all have roughly the same proton affinity, and the deprotonation energy is …
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Applied and Fundamental Studies of LNT-SCR Dual-layer Monolithic Catalysts for Lean NOx Emission Control
… effects of reductants (CO, H2 and C3H6) on Cu-SSZ-13 catalyzed NH3-SCR as the SCR component in the combined system is periodically exposed to a rich exhaust. The three reductants affect to different extent the NH3-SCR reactions. Propylene is most effective in promoting NO2 reduction to NO by …
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Understanding Heterogenous Catalysis on Zeolites and Manganese Oxides
… profile for different chain-sized alkynes in Cu-SSZ-13 was studied, using DFT and biased MD calculations. The results unequivocally show that the alkyne with size most commensurable to the hole to be thermodynamically favoured to adsorb. In addition, the elongation of the chain by just one …
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Geochemistry, structure, and tectonic evolution of the Eldivan ophiolite, Ankara Melange, central Turkey
<p>The Eldivan ophiolite, in the Ankara Mélange, represents the remnant of an ocean basin that developed in the İzmir-Ankara-Erzincan Ocean and collapsed the form the İzmir -Ankara-Erzincan suture zone (İAESZ) through continental block collision. Whole-rock and mineral geochemical evidence show …
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Κοιτασματογένεση πλατινοειδών ορυκτών και χρωμιτών συνδεόμενων με την πετρογενετική εξέλιξη των οφιολιθικών συμπλεγμάτων Βούρινου και Πίνδου
… ενός περιθωρίου πάνω από μια ζώνη καταβύθισης (SSZ). Η μετάβαση από τον Βούρινο στη Μηλιά και την Πεύκη και εν τέλει στον Κορυδαλλό πιθανά ισοδυναμεί με τη μετάβαση από το περιβάλλον μιας λεκάνης μπροστά από νησιωτικό τόξο στο (χώρο κάτω από το) ίδιο το τόξο και τέλος σε μια μικρών διαστάσεων …