Relation between adsorption and catalysis in the case of NiO and Co3O4

Arvaniti, I; Netos, V; Siokos, V; Metaxa, E; Kalantzopoulou, FR

dc.contributor.author	Arvaniti, I	en
dc.contributor.author	Netos, V	en
dc.contributor.author	Siokos, V	en
dc.contributor.author	Metaxa, E	en
dc.contributor.author	Kalantzopoulou, FR	en
dc.date.accessioned	2014-03-01T01:34:26Z
dc.date.available	2014-03-01T01:34:26Z
dc.date.issued	2010	en
dc.identifier.issn	0169-4332	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20730
dc.subject	Adsorption/catalysis	en
dc.subject	Chemisorption/physisorption	en
dc.subject	Hydrogenation of alkenes	en
dc.subject	Inverse gas chromatography	en
dc.subject	Isomerization of alkanes	en
dc.subject	Reversed flow-inverse gas chromatography	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Materials Science, Coatings & Films	en
dc.subject.classification	Physics, Applied	en
dc.subject.classification	Physics, Condensed Matter	en
dc.subject.other	1-butene	en
dc.subject.other	Adsorbate-adsorbate interaction	en
dc.subject.other	Adsorption energy distribution	en
dc.subject.other	Adsorption/desorption kinetics	en
dc.subject.other	Chemisorption/physisorption	en
dc.subject.other	Differential energy	en
dc.subject.other	Experimental measurements	en
dc.subject.other	Heterogeneous surface	en
dc.subject.other	Hydrogenation reactions	en
dc.subject.other	Inverse gas chromatography	en
dc.subject.other	Isobutanes	en
dc.subject.other	Kinetic coefficient	en
dc.subject.other	Lateral interactions	en
dc.subject.other	n-Butane	en
dc.subject.other	Physicochemical property	en
dc.subject.other	Reversed flow	en
dc.subject.other	Surface chemicals	en
dc.subject.other	Activation energy	en
dc.subject.other	Adsorbates	en
dc.subject.other	Adsorbents	en
dc.subject.other	Adsorption	en
dc.subject.other	Bond strength (chemical)	en
dc.subject.other	Butane	en
dc.subject.other	Butenes	en
dc.subject.other	Catalysis	en
dc.subject.other	Catalysts	en
dc.subject.other	Distribution functions	en
dc.subject.other	Electron transitions	en
dc.subject.other	Gases	en
dc.subject.other	Hydrocarbons	en
dc.subject.other	Hydrogenation	en
dc.subject.other	Isomerization	en
dc.subject.other	Isomers	en
dc.subject.other	Liquefied petroleum gas	en
dc.subject.other	Rate constants	en
dc.subject.other	Surface structure	en
dc.subject.other	Gas chromatography	en
dc.title	Relation between adsorption and catalysis in the case of NiO and Co3O4	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.apsusc.2009.12.147	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.apsusc.2009.12.147	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Reversed flow-inverse gas chromatography is a quick, precise and effective methodology to characterize physicochemical properties of adsorbents. This is extended to the experimental measurement of the adsorption energy distribution function as well as of the differential energy of adsorption due to lateral interactions of molecules adsorbed on two catalysts, namely Co3O4 and NiO. Thus, the nature and the strength of the adsorbate-adsorbent and adsorbate-adsorbate interactions are extracted in order to give detailed answers to the questions: (a) where are the molecules on the heterogeneous surface and (b) which is the nature of the surface chemical bonds? Thus, adsorption of 1-butene was found to take place immediately and irreversibly. It holds a deep relation between adsorption and catalysis of 1-butene over these catalysts. As a consequence, the adsorption of 1-butene in the presence of hydrogen leads to isobutane and/or n-butane, depending on the temperature. It can be seen from the adsorption/desorption kinetic constants that the adsorption of 1-butene on Co3O4 is one order higher than over NiO. This fact in connection with the bigger activation energy and the lower kinetic coefficients concerning hydrogenation reaction over NiO shows that Co3O4 is a better catalyst for this kind of catalysis. (C) 2010 Elsevier B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Applied Surface Science	en
dc.identifier.doi	10.1016/j.apsusc.2009.12.147	en
dc.identifier.isi	ISI:000277731800076	en
dc.identifier.volume	256	en
dc.identifier.issue	17	en
dc.identifier.spage	5559	en
dc.identifier.epage	5565	en