01988nas a2200241   4500008004100000022001400041245009600055210006900151260000800220300001100228490000800239520117000247653000901417653001401426653001401440653002301454653003401477100003701511700002101548700003101569700002601600856012001626       2021                        eng d  a1566-736700aPromoted mesoporous Fe-alumina catalysts for the non-oxidative dehydrogenation of isobutane0 aPromoted mesoporous Fealumina catalysts for the nonoxidative deh  cFEB  a1062630 v1503 a<p>Production of isobutene is commercially consequential and highly demanding from the end-use industries being a key platform molecule as well as an intermediate for a variety of value-added chemicals. Traditionally, isobutene is prepared via steam cracking and fluid catalytic cracking methods. However, the catalysts used in these conventional methods have disadvantages like coke formation, sintering, etc. In this study, the catalytic non-oxidative dehydrogenation of isobutane over acidic, alkaline, and noble metal promoted mesoporous iron-doped catalysts was investigated. Iron doping has a significant function in controlling isobutene selectivity. The synthesis method is crucial to achieve successful metal doping in the mesoporous alumina matrix. Promoted catalysts exhibited a notable difference in isobutane conversion with a marginal change in dehydrogenation selectivity. Silver promoted catalyst showed slightly higher isobutene yield due to the optimal catalytic properties. This catalyst was stable for a considerable duration, and coke deposition, as well as particle agglomeration, were observed to faintly inhibit the catalytic activity.</p>
10airon10aIsobutane10aIsobutene10aMesoporous alumina10aNon-oxidative dehydrogenation1 aVenugopalan, Aswathy, Thareparam1 aKandasamy, Prabu1 aGupta, Nikitra, Nihalchand1 aThirumalaiswamy, Raja  uhttps://library.ncl.res.in/content/promoted-mesoporous-fe-alumina-catalysts-non-oxidative-dehydrogenation-isobutane01853nas a2200277   4500008004100000022001400041245012800055210006900183260000800252300001400260490000800274520094000282653000601222653001301228653001601241653001101257653000901268653001901277653003001296100002901326700002101355700001901376700002201395700002601417856013201443       2021                        eng d  a1011-372X00aUtilizing the oxygen carrier property of cerium iron oxide for the low-temperature synthesis of 1,3-butadiene from 1-butene0 aUtilizing the oxygen carrier property of cerium iron oxide for t  cOCT  a3057-30660 v1513 a<p>Low-temperature oxidative dehydrogenation (ODH) of 1-butene to 1,3-butadiene is one of the challenging reactions in the polymer industry. Towards this a highly dispersed cerium iron oxide was synthesized by citrate gel combustion method and employed for the synthesis of 1,3-butadiene (BD) from 1-butene. The reaction was carried out at low temperature under an oxygen-free atmosphere in a continuous flow mode fixed bed reactor. A decrease in the lattice parameters observed from PXRD and high-resolution TEM analysis proved that iron occupies cerium sites in the crystal lattice. XPS, TPR, and oxygen uptake studies quantified the nature and abundance of different oxygen species. ODH was observed through consuming lattice oxygens. The vacancies generated could be filled by re-oxidation with an external supply of oxygen which will restore the catalytic activity demonstrating the Mars van Krevelen mechanism. [GRAPHICS] .</p>
10a110a1-butene10a3-butadiene10aCerium10airon10aLattice oxygen10aoxidative dehydrogenation1 aVenugopalan, Aswathy, T.1 aKandasamy, Prabu1 aGogoi, Pranjal1 aRatneshkumar, Jha1 aThirumalaiswamy, Raja  uhttps://library.ncl.res.in/content/utilizing-oxygen-carrier-property-cerium-iron-oxide-low-temperature-synthesis-13-butadiene-1