Light alkanes oxidation

Figure 1.3 Left. Detailed view of the Nb K-edge XANES data of a pyridine salt of niobium-exchanged molybdo(vanado)phosphoric acid (NbPMo fVJpry) as a function of temperature [31]. A change in niobium oxidation state, from Nb5+ to Nb4+, is identified between 350 and 420°C by a relative increase in absorption about 19.002 keV, and can be connected with the activation of the catalyst for light alkane oxidation. Right. Radial Fourier-transform EXAFS function for the NbPMo (V)pyr sample heated to 420°C [31 ]. The two peaks correspond to the Nb-O (1.5 A) and Nb-Mo (3 A) distances in the heteropolymolybdate fragments presumed to be the active phase for alkane oxidation. (Reproduced with permission from Elsevier.)...

Figure 7. Reductive activation of dioxygen for light alkane oxidation.

The main conclusion that could be derived from the above analysis is the ascertaining of the extraordinary complexity of the system we attempt to model. Even staying at the level of micro-chemical modeling we must accept as a fact the fundamental difference between the phenomenon and its model and, as a result, the impossibility to develop the description that reflects the reality in all its manifestations. A possible solution of the modeling problem, as applied to light alkane oxidative processing, can be found on the way of stepwise and successive execution of the basic principles stated below. 

Light Alkanes Oxidation-. Targets Reached and Current Challenges... 

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