Catalytic selective oxidation of isobutane in a decoupled redox-process

The catalytic selective oxidation of isobutane to methacrolein (MAC) and methacrylic acid (MAA) is known proceed via a Mars-Van Krevelen mechanism. When the reaction performed in common reactor with co-feeding reactant oxygen, reactive oxygen species are present on catalyst surface whereby non-selective reactions occur. In this work, we studied possibility decouple redox mechanism meaning separate step re-oxidation for (IBAN) MAC MAA. For purpose, two configurations were employed: periodic two-zone fluidized bed (TZFBR). Whereas allows temporal separation steps, TZFBR enables spatial separation. A Cs-based Keggin type heteropolycompound was employed as characterized before after by XRD, Raman XPS better understand structural chemical changes during operation. effect oxygen/IBAN concentration performance studied. it found that conversion formation products decreased consumption available period. whole tests, low injected into reoxidation part cycles led high selectivity desired (MAC+MAA).