Oxidative dehydrogenation of propane using lattice oxygen of vanadium oxide was carried out with a fix-bed flow reactor at 450 °C under atmospheric pressure. Vanadium oxide loaded on SiO₂ from V(t-BuO)₃O afforded a high propylene selectivity of 88.3% with a propane conversion of 26.5% based on the lattice oxygen of vanadium oxide. The catalyst prepared with V(t-BuO)₃O exhibited higher propane conversion and propylene selectivity than that prepared with NH₄VO₃ . Raman, XPS, and XRD analyses revealed that isolated VO₄ ^{3 −} species seem to be active sites in the ODHP. For the dehydrogenation of propane, the lattice oxygen of the isolated VO₄ ^{3 −} species was used to give propylene and H₂O. The isolated VO₄ ^{3 −} species was reduced to the isolated V³⁺ species and was regenerated by oxidation with oxygen. The activity was maintained for at least 10 repeated cycles, suggesting that VO_x /SiO₂ would be a promising catalyst for ODHP.

Metal–organic frameworks (MOFs) represent the largest class of materials among crystalline porous materials ever developed, and have attracted attention as core materials for separation technology. Their extremely uniform pore aperture and nearly unlimited structural and chemical characteristics have attracted great interest and promise for applying MOFs to adsorptive and membrane-based separations. This paper reviews the recent research into and development of MOF membranes for gas separation. Strategies for polycrystalline membranes and mixed-matrix membranes are discussed, with a focus on separation systems involving hydrocarbon separation, CO₂ capture, and H₂ purification. Challenges to and opportunities for the industrial deployment of MOF membranes are also discussed, providing guidance for the design and fabrication of future high-performance membranes. The contributions of the underlying mechanism to separation performance and adopted strategies and membrane-processing technologies for breaking the selectivity/permeability trade-off are discussed.

Metal-organic frameworks (MOFs) represent the largest class of materials among the crystalline porous materials ever developed and have attracted attention as core materials for separation technology. Their extremely uniform pore aperture and nearly unlimited structural and chemical characteristics have attracted great interest and promise in applying MOFs to adsorptive and membrane–based separations. This paper reviews the recent research and development of MOF membranes for gas separation. Strategies for polycrystalline membranes and mixed matrix membranes are discussed, with a focus on separation systems involving hydrocarbon separation and CO2 capture. Challenges and opportunities for the industrial deployment of MOF membranes are also be discussed, providing guidance for the design and fabrication of future high-performance membranes. The contributions of the underlying mechanism to separation performances, and the adopted strategies and membrane processing technologies for breaking the selectivity/permeability trade–off are discussed.

It is well known that V–Mg based complex oxide catalysts show a high activity for the oxidative dehydrogenation of 1-butene (1-C₄H₈) to buta-1,3-diene (BD). In this study, in order to improve the catalytic performance of V–Mg based complex oxides, we tried to add metal oxide such as Al₂O₃, Fe₂O₃, and Co₂O₃ and carried out the oxidative dehydrogenation (ODH) of 1-C₄H₈ without and with molecular O₂ at 480 °C. The addition of Co₂O₃ to the V–Mg complex oxides resulted in the highest BD yield of 22.5 % with only lattice oxygen of the catalyst. For continuous production of BD, the ODH under O₂ flow was also investigated. The V–Mg–Co catalyst exhibited higher 1-C₄H₈ conversion (28.5 %) and BD yield (17.5 %) than those of the V–Mg catalyst, and it was indicated that the high reactivity of the lattice oxygen affected the ODH under O₂ flow according to the pulse reaction of 1-C₄H₈ and ¹⁸O₂.