Prospects for the direct conversion of light alkanes to petrochemicalfeedstocks and liquid fuels - a review
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Spring National Meeting AIChE, New Orleans
Spring National Meeting AIChE, New Orleans
Cited by (149)
The effect of active site distribution in bi-functional Pt-zeolite catalysts for ethane dehydroaromatization
2020, Applied Catalysis A: GeneralCitation Excerpt :Therefore, ethylene is required to be transformed to aromatics to overcome the thermodynamic limitation and increase the overall conversion [28]. As NH3-TPD results showed similar strong acid site concentration for all four zeolites, it may be assumed that the consumption of ethylene is favored by the close proximity of metal and acid sites which catalyzes the oligomerization and cyclization transformation [29,30]. For this reason, both distribution and location of metal active sites in the catalysts probably play a crucial role with respect to both activity and BTX selectivity.
Propane activation on Zn-modified zeolite. The effect of the nature of Zn-species on the mechanism of H/D hydrogen exchange of the alkane with Brønsted acid sites
2019, Journal of CatalysisCitation Excerpt :Indeed, the catalysts, which are traditionally prepared by the ion exchange or impregnation of ZSM-5 zeolite (ammonia- or acid-form) with aqueous solution of zinc salts, have demonstrated significantly higher activity and selectivity for aromatics as compared to the catalysts based on pure acid-form ZSM-5 zeolite [5,10]. On the other hand, the samples obtained by the mechanical mixing of zinc oxide and the acid-form zeolite were also found to exhibit satisfactory activity in the alkane conversion similar to that demonstrated by the ion exchanged or impregnated zeolites [5,7]. The studies of the composition and the state of zinc introduced into the zeolites by the ion exchange methods have shown the presence of different Zn-species: isolated Zn2+ cations and zinc oxide particles of various dimensions and localization.
DFT studies on the activation of C-H bonds on V/P mixed oxides
2015, Cuihua Xuebao/Chinese Journal of CatalysisCitation Excerpt :In contrast, a direct route, e.g., selective oxidation of light alkanes, in principle, would proceed more efficiently and cost effectively. In addition to the well-known industrial process of the oxidation of n-butane to maleic anhydride, some other important examples under active investigation are methane partial oxidation (MPO), oxidative dehydrogenation (ODH), and oxidation of propane to acrylonitrile [4]. Effective catalysts for the selective oxidation of alkane are multi-component oxides composed of more than two elements of which at least one is a transition metal with a variable valence (most often V, Mo or Fe) and another is a main group non-metal element (such as P, S, Se, or Te) [5].
Applications of the "nano to bulk" Mn oxides: Mn oxide as a Swiss army knife
2015, Coordination Chemistry Reviews