caa a22 4500 606195319 CHVBK 20210128100918.0 cr unu---uuuuu 210128e20150601xx s 000 0 eng 10.1007/s10934-015-9952-6 doi (NATIONALLICENCE)springer-10.1007/s10934-015-9952-6 Effect of different weight loadings of MoO x /SBA-15 on the oxidative dehydrogenation of n -octane [Elektronische Daten] [Ajij Golandaj, Abdul Mahomed, Sooboo Singh, Holger Friedrich] This study examines the effect of different weight loadings of molybdenum as molybdenum oxide, supported on SBA-15 for the oxidative dehydrogenation of n-octane. The loadings of molybdenum on SBA-15 were performed by wet impregnation method the resultant catalysts were characterised by ICP-OES, BET physisorption studies, PXRD, Raman spectroscopy, TEM and SEM. Raman spectroscopy showed the presence of monomeric MoO x species at 4wt%, monomeric and polymeric species at 7wt%, polymeric and crystalline MoO3 species at 10wt% and only crystalline Mo oxide at 18wt%. SBA-15 as the catalyst is active but mainly selective to cracked products (33%) and CO x (32%), whereas the loaded catalysts produced octenes and C8 aromatics. At similar conversion, the highest selectivity to octenes was observed with the 4wt% catalyst which decreased with an increase in the molybdenum loadings. The highest selectivity to aromatics was observed with the 7wt% catalyst. When the 10wt% catalyst was tested over the temperature range of 350-550°C, the conversion increased and selectivity towards aromatics was promoted. The extent of non-selective oxidation increased with an increase in the oxygen content in the feed while a variable GHSV study revealed that the octenes, cracked products and CO2 are the primary products of the reaction. Springer Science+Business Media New York, 2015 Molybdenum nationallicence SBA-15 nationallicence Monomeric nationallicence Polymeric nationallicence Oxidative dehydrogenation nationallicence n -Octane nationallicence Golandaj Ajij School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, 4000, Durban, South Africa aut Mahomed Abdul School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, 4000, Durban, South Africa aut Singh Sooboo School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, 4000, Durban, South Africa aut Friedrich Holger School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, 4000, Durban, South Africa aut Journal of Porous Materials Springer US; http://www.springer-ny.com 22/3(2015-06-01), 787-796 1380-2224 22:3<787 2015 22 10934 https://doi.org/10.1007/s10934-015-9952-6 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s10934-015-9952-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Golandaj Ajij School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, 4000, Durban, South Africa aut NATIONALLICENCE 700 1- Mahomed Abdul School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, 4000, Durban, South Africa aut NATIONALLICENCE 700 1- Singh Sooboo School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, 4000, Durban, South Africa aut NATIONALLICENCE 700 1- Friedrich Holger School of Chemistry and Physics, University of KwaZulu-Natal, Westville Campus, 4000, Durban, South Africa aut NATIONALLICENCE 773 0- Journal of Porous Materials Springer US; http://www.springer-ny.com 22/3(2015-06-01), 787-796 1380-2224 22:3<787 2015 22 10934