Oxidative dehydrogenation ethane

Liu YM, Cong PJ, Doolen RD, Guan SH, Markov V, Woo L, Zeyss S, Dingerdissen U. 2003. Discovery from combinatorial heterogeneous catalysis—a new class of catalyst for ethane oxidative dehydrogenation at low temperatures. Appl Catal A Gen 254 59 -66. 

The catalysts used and the temperature for the data shown in Fig. 2 are listed in Table IV. Except for one, the studies were conducted at or below 550°C, which was substantially lower than many experiments for ethane oxidative dehydrogenation. This is because above this temperature, the contribution of homogeneous gas-phase reaction begins to be significant (see, for example, Ref. 28). 

M.C. Huff and L.D. Schmidt. Elementary Step Model of Ethane Oxidative Dehydrogenation on Pt-Coated Monoliths. AIChE J., 42 3484-3497,1996. 

Symyx entered this competition in 1997 in collaboration with Hoechst with the goal of creating and validating primary and secondary synthesis and screening technologies and the use of this workflow to broadly explore mixed metal oxide compositions so as to discover and optimize new hits . The initial goal was a 10-fold increase in the space-time yield relative to the state-of-the-art MoVNb system for the ethane oxidative dehydrogenation reaction to ethylene. 

FIGURE 20 (A) Raman spectra recorded during ethane oxidative dehydrogenation on... 

Figure 8 shows the effect of temperature on the ethylene-to-ethane ratio. It is noted that the ratio increases with increasing temperature. The result is consistent with the result in a conventional reactor. It indicates that ethylene is formed from ethane as a secondary product. The reaction of ethane oxidative dehydrogenation is accelerated with a rise in temperature. 

Figure 2.14. The membrane reactor and some typical experimental results for the ethane oxidative dehydrogenation. From Yang et al. [2.288].

Membrane reactor with oxygen conducting membrane for ethane oxidative dehydrogenation... 

The process and the catalyst claimed were developed for ethane oxidative dehydrogenation, and acetic acid was only a minor by-product of the reaction however, the use of pressures above atmospheric enhanced the selectivity of acetic acid. 

Martinez-Huerta, M., Deo, G., Pierro, J., et al. (2008). Operando Raman-GC Smdy on the Structure-activity Relationships in V "-F/Ce02 Catalyst for Ethane Oxidative Dehydrogenation The Formation of CeV04, J. Phys. Chem. C, 112, pp. 11441-11447. 

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). 

Centi, G. (1993). Vanadyl Pyrophosphate A Critical Overview, Catal. Today, 16, pp. 5-26. Lopez Nieto, J., Botella Asuncion, P., Vazquez Navarro, M., et al. (2003). Worldwide Patent 2003064035 Al, Method for the Oxidative Dehydrogenation of Ethane (CSIC-UPV). Heracleous, E. and Lemonidou, A. (2006). Ni-Nb-O Mixed Oxides as Flighly Active and Selective Catalysts for Ethene Production via Ethane Oxidative Dehydrogenation. Part I Characterization and Catalytic Performance, J. Catal., 237, pp. 162-174. 

Heracleous, E. and Lemonidou, A. (2006). Ni-Nb-O Mixed Oxides as Highly Active and Selective Catalysts for Ethene Production via Ethane Oxidative Dehydrogenation. Part II Mechanistic Aspects and Kinetic Modeling, J. Catal., 237, pp. 175-189. 

Liu, Y., Cong, R, Doolen, R., etal. (2003). Discovery from Combinatorial Heterogeneous Catalysis A New Class of Catalyst for Ethane Oxidative Dehydrogenation at Low Temperatures, Appl. Catal. A Gen., 254, pp. 59—66. 

Rodriguez, M., Ardissone, D., Lopez, E.,etaJ.(20U). Reactor Designs for Ethylene Production via Ethane Oxidative Dehydrogenation Comparison of Performance, Ind. Eng. Chem. Res., 50, pp. 2690-2697. 

Thermodynamics disfavors the dissociation of CO2 to O2 and CO in the gas phase. Under standard conditions, the enthalpy of dissociation is A H° = +293.0 kJ/mol. At 427°C, the dissociation constant Kp is only about 10 . The literature shows that CO2 could play an oxidant role, but only at high temperatures (usually > 650°C). In fact, the first applications reported on the use of CO2 were those working at very high temperature reactions such as methane oxidative coupUng and ethane oxidative dehydrogenation. However, Dury et al. reported recently that, in the presence of oxide and noble metal catalysts, CO2 can dissociate and act as an oxidant at much lower temperatures (below 450°C). ... 

Woods, M., Mirkelamoglu, B. and Ozkan, U. (2009). Oxygen and nitrous oxide as oxidants Implications for ethane oxidative dehydrogenation over sUica-titania-supported molybdenum, J. Phys. Chem. C, 113, pp. 10112-10119. 

Argyle, M.D., Chen, K., Bell, A.T., and Iglesia, E. Ethane oxidative dehydrogenation pathways on vanadium oxide catalysts. J. Phys. Chem. B 2002, 106, 5421-5427. 

Liu, Y, Cong, R, Doolen, R.D., Turner, H.W., and Weinberg, W.H. High-throughput synthesis and screening of V-Al-Nb and Cr-Al-Nb oxide hbraries for ethane oxidative dehydrogenation to ethylene. Catal. Today 2000, 61, 87-92. 

Heracleous, E., Lemonidou, A. A., and Lercher, J. A. Mechanistic features of the ethane oxidative dehydrogenation by FTIR spectroscopy over a MoGj/AljO, catalyst. Appl. Catal, A 264, 73-80 (2004). 

Christodoulakis, A., and Boghosian, S. Molecular structure and activity of molybdena catalysts supported on zirconia for ethane oxidative dehydrogenation studied by oper-ando Raman spectroscopy. J. Catal. 260,178-187 (2008). 

Katerina, N., Roman, B., and Blanka, W. On the effect of cobalt loading on catalytic activity of Co-BEA zeolites in ethane oxidative dehydrogenation and anunoxidation. Scientific papers of the University of Pardubice. Series A. Faculty of Chemical Technology 9, 111-128(2003). 

J. Le Bars, J.C. Vedrine, A. Auroux, B. Pommier, G.M. Pajonk et al., Calorimetric study of vanadium pentoxide catalysts used in the reaction of ethane oxidative dehydrogenation. J. Phys. Chem. 96, 2217-2221 (1992)... 

The catalytic properties are presented in Fig, 5 and Table 2. Dependences of activity on pH sluny for propane oxidation (curee 2), propane ammoxidation (curve 3) and ethane oxidative dehydrogenation (curve 1) as well as content of Ml phase (curve 4) have... 

Ethylene is a sole product of selective conversion in ethane oxidative dehydrogenation. The studied catalytic system is most selective in this reaction. 

Rodriguez, M. A. L., Ardissone, D. E., L6pez, E., Pedemera, M. N. and Borio, D. O. (2010) Reactor designs for ethylene production via ethane oxidative dehydrogenation comparison of performance. Industrial and Engineering Chemistry Research, 50,2690-2697. 

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