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dc.contributor.authorSavva, Petros G.en
dc.contributor.authorOlympiou, G. G.en
dc.contributor.authorCosta, Costas N.en
dc.contributor.authorRyzhkov, V. A.en
dc.contributor.authorEfstathiou, Angelos M.en
dc.creatorSavva, Petros G.en
dc.creatorOlympiou, G. G.en
dc.creatorCosta, Costas N.en
dc.creatorRyzhkov, V. A.en
dc.creatorEfstathiou, Angelos M.en
dc.date.accessioned2019-11-21T06:22:44Z
dc.date.available2019-11-21T06:22:44Z
dc.date.issued2005
dc.identifier.urihttp://gnosis.library.ucy.ac.cy/handle/7/56111
dc.description.abstractEthylene decomposition over Ni supported on novel carbon nanotubes (CNT) and nanofibers under consecutive reaction/regeneration cycles to form CO-free hydrogen and carbon deposits have been investigated. The present work highlights the effects of support chemical composition, catalyst synthesis method and Ni metal loading on the catalytic activity and stability of nickel. A novel 0.5 wt.% Ni/CNT catalyst which presents the highest value of a constant hydrogen product yield (17.5 mol H2/mol Ni), following consecutive reaction (complete deactivation) → regeneration (20% O2/He, 400 °C) cycles, ever reported in the open literature has been developed. Transmission electron microscopy (TEM) and XRD studies revealed that the 0.5 wt.% Ni/CNT catalyst promotes the formation of two types of carbon nanofibers during ethylene decomposition at 400 °C, result that reduces significantly the rate of Ni encapsulation during reaction. The opposite is true in the case of 0.3 wt.% Ni/SiO2 catalyst. In the case of Ni/CNT, there is a narrow range of Ni loading for which maximum H2 product yield is obtained, while in the case of Ni/SiO2, a monotonic increase in the H2 product yield is obtained (Ni loading in the range 0.3-7.0 wt.%). © 2005 Elsevier B.V. All rights reserved.en
dc.sourceCatalysis Todayen
dc.source.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-18844378577&doi=10.1016%2fj.cattod.2005.02.008&partnerID=40&md5=593fd8955bbdd61391feff3ae7bd1d8f
dc.subjectDecompositionen
dc.subjectHydrogenen
dc.subjectCarbon nanotubesen
dc.subjectX ray diffractionen
dc.subjectNickelen
dc.subjectTransmission electron microscopyen
dc.subjectEthyleneen
dc.subjectSilicaen
dc.subjectC2H4en
dc.subjectC2H4 decompositionen
dc.subjectGasification of carbon nanofibersen
dc.subjectNi/CNFen
dc.subjectNi/SiO2en
dc.titleHydrogen production by ethylene decomposition over Ni supported on novel carbon nanotubes and nanofibersen
dc.typeinfo:eu-repo/semantics/article
dc.identifier.doi10.1016/j.cattod.2005.02.008
dc.description.volume102-103
dc.description.startingpage78
dc.description.endingpage84
dc.author.faculty002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences
dc.author.departmentΤμήμα Χημείας / Department of Chemistry
dc.type.uhtypeArticleen
dc.description.notes<p>Cited By :19</p>en
dc.source.abbreviationCatal Todayen
dc.contributor.orcidEfstathiou, Angelos M. [0000-0001-8393-8800]
dc.contributor.orcidCosta, Costas N. [0000-0002-8459-0356]
dc.contributor.orcidSavva, Petros G. [0000-0001-6390-315X]
dc.gnosis.orcid0000-0001-8393-8800
dc.gnosis.orcid0000-0002-8459-0356
dc.gnosis.orcid0000-0001-6390-315X


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