Propane selective oxidation

Products obtained by propane-selective oxidation have been analyzed by gas sensor systems [19, 26]. Usually, several or multiple kinds of compounds are produced during the selective oxidation of propane. The formation of CO, C02, aldehydes such as acrolein, and ketone were observed over iron-silica catalysts [28, 29]. During the initial stage of catalyst investigation, the conversion of propane and the selectivity toward useful oxygenate products as chemical resources are of interest. Semiconductor-type gas sensors selective toward the oxygenate were employed to estimate the yield of oxygenate products, with a combination of the potentiometric CO sensor and the ND-IR C02 sensor [30]. 

Trunschke A. Propane selective oxidation to acrylic acid. In Hess C, Schlogl R, editors. Nanostructured catalysts Selective oxidation reactions. Cambridge RSC Nanoscience Nanotechnology 2011. p. 56-95. 

Lin MM. Complex metal-oxide catalysts for selective oxidation of propane and derivatives. I. Catalysts preparation and application in propane selective oxidation to acrylic acid. Applied Catalysis, A General. 2003 250(2) 305-318. 

Propane Selective Oxidation to Propene and Oxygenates on Metal Oxides. In Metal Oxides, Chemistry and Applications (ed. J.LG. Eierro), CRC Press, Boca Raton, p. 414. 

Xu J, Mojet BL, van Ommen JG, Lefferts L (2005) Formation of M2-F(02)(C3H8) species in alkaline-earth-exchanged Y zeolite during propane selective oxidation. J Phys Chem B... 

Ueda W, Vitry D, Katou T (2004) Stmctural organization of catalytic functions in Mo-based oxides for propane selective oxidation. Catal Today 96 (4) 235-240 Farges F, Brown GE, Rehr JJ (1997) Ti K-edge XANES studies of Ti coordination and disorder in oxide compounds Comparison between theory and experiment Phys Rev B 56 (4) 1809-1819... 

Extensive efforts have been undertaken for propane selective oxidation and ammox-idation to acrylic acid and acrylonitrile, respectively. In fact, as can be seen in Fig. 24.1, and according to the literature of patents, the major interest in alkane heterogeneous catalysis over the last few years has covered the selective oxidation of propane. 

With respect to the catalytic reactions, there are well-established industrial reactions (as occurs in the case of n-butane to maleic anhydride), reactions in the preindustrial stage (such as the transformation of propane to acrylonitrile), very promising reactions (such as ethane oxidative dehydrogenation to ethylene), and potential reactions whose economical viability will depend on the prices of crude and natural gas in the future (such as propane selective oxidation to acrylic acid or methane transformation). 

Vitry, D., Morikawa, Y, Dubois, J., et al. (2003). Propane Selective Oxidation over Monophasic Mo-V-Te-O Catalysts Prepared by Hydrothermal Synthesis, Top. Catal., 23, pp. 47-53. KendeU, S., Alston, A. and Brown, T. (2009). Kinetic Simulation of Methacrolein and Lactone Production from the Catalytic Oxidation of Isohutane over Lanthanide Phosphomolybdates, Chemical Product and Process Modeling, 4, pp. No pp given. 

Li, W., Oshihara, K. and Ueda, W. (1999). Catalytic Performance for Propane Selective Oxidation and Surface Properties of 12-Molybdophosphoric Acid Treated with Pyridine, Appl. Catal. A. Gen., 182, pp. 357—363. 

Vitry, D., Dubois, J. and Ueda, W. (2004). Strategy in Achieving Propane Selective Oxidation over Multi-Functional Mo-Based Oxide Catalysts, J. Mol. Catal. A Chem., 220, pp. 67-76. 

Propane Selective Oxidation to Propene and Oxygenates on Metal Oxides 415... 

Propane is a homologue of -butane with one less CH2 group and therefore, the same mechanism of catalyst operation may apply. Unfortunately, VPO catalysts are not particularly effective in propane selective oxidation (<15% yield to acrylic acid) due to lesser reactivity of propane (higher reaction temperatures) and lesser stability of acrylic acid compared with maleic anhydride (enhanced total combustion) [29]. At the higher reaction temperatures, coke is also formed in some cases on the catalyst surface [30]. Typical catalytic results for propane partial oxidation over VPO catalysts, reported in the literature, are summarized in Table 13.2. 

Li, W., Oshikara, K., and Ueda, W. Catalytic performance for propane selective oxidation and surface properties of 12-molybdophosphoric acid treated with pyridine. Gatal. A Gen. 1999,182, 357-363. 

Xu, J., Mojet, B.L., vanOmmen, J.G., andLefferts, L. Propane selective oxidation on alkaline earth exchanged zeolite Y Room temperature in situ IR study. Phys. Chem. Chem. Phys. 2003, 5, 4407-4413. 

---