Propane reactions over natural Todorokite
| dc.contributor.author | Katranas, T. K. | en |
| dc.contributor.author | Godelitsas, A. C. | en |
| dc.contributor.author | Vlessidis, A. G. | en |
| dc.contributor.author | Evmiridis, N. P. | en |
| dc.date.accessioned | 2015-11-24T16:45:37Z | |
| dc.date.available | 2015-11-24T16:45:37Z | |
| dc.identifier.issn | 1387-1811 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/8958 | |
| dc.rights | Default Licence | - |
| dc.subject | todorokite | en |
| dc.subject | catalysis | en |
| dc.subject | propane | en |
| dc.subject | dehydrogenation | en |
| dc.subject | cracking | en |
| dc.subject | octahedral molecular-sieves | en |
| dc.subject | marine manganese nodules | en |
| dc.subject | oxidative dehydrogenation | en |
| dc.subject | catalytic-activity | en |
| dc.subject | oxide catalysts | en |
| dc.subject | physicochemical characteristics | en |
| dc.subject | chemical-composition | en |
| dc.subject | crystal-structures | en |
| dc.subject | tunnel-structure | en |
| dc.subject | behavior | en |
| dc.title | Propane reactions over natural Todorokite | en |
| heal.abstract | This study reports results of propane transformation over the natural microporous manganese oxide, todorokite, and its hydrogen form (H-Todorokite), at the temperature range of 350degrees-550 degreesC. Both materials were fully characterized and their catalytic results were compared with results obtained with commercial Ultra-Stable-Y (USY), and steamed H-ZSM-5 zeolite catalysts. The natural todorokite sample shows appreciable dehydrogenation activity (propylene yield similar to8%, selectivity to propylene >31%), considerably higher compared to H-ZSM-5 zeolite. This is justified by the absence of strong acid sites and the presence of a large amount of ion-exchangeable cations, which induce the dehydrogenation capability of the material. The proton-exchanged form of todorokite, appears to act as a very efficient cracking catalyst (yield to methane and ethylene similar to40%, selectivity to cracking products >85%), due to the formation of a large number of framework Bronsted acid sites. The observed cracking capability of H-todorokite is superior to the activity of the commercial fluid catalytic cracking (FCC) USY catalyst, thus suggesting that the proton form of the mineral is a promising catalyst for the cracking of small alkanes. (C) 2004 Elsevier Inc. All rights reserved. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | DOI 10.1016/j.micromeso.2004.02.007 | - |
| heal.identifier.secondary | <Go to ISI>://000220946800003 | - |
| heal.identifier.secondary | http://ac.els-cdn.com/S1387181104000484/1-s2.0-S1387181104000484-main.pdf?_tid=b537640c-356a-11e3-80da-00000aab0f02&acdnat=1381821997_0c8a1105934c8e41ba8282dd3ba77318 | - |
| heal.journalName | Microporous and Mesoporous Materials | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2004 | - |
| heal.publisher | Elsevier | en |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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