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Metal phthalocyanine complexes encapsulated in MIL-101, and used as “ship-in-a-bottle” catalysts, show outstanding TONs in the aerobic oxidation of tetralin. [ABSTRACT FROM AUTHOR]

Abstract: This paper presents a series of applications of catalytic membrane reactors (CMR) to oxidation reactions. Four reactions were tested in our group. Alkane activation (C2, C3 and C4) or total oxidation (WAO) is implemented in various membrane reactor modes, using dense, microporous or mesoporous membranes. In some cases, a catalyst bed is associated with a membrane, whereas other applications use an intrinsically active membrane. Progresses in catalyst and membrane design, along with careful operational conditions led to overall higher performances when compared to conventional processes. [Copyright &y& Elsevier]

Abstract: Following the development of a high-throughput (HT) methodology for the evaluation of diesel soot oxidation catalysts in a 16 parallel channels reactor, a library of over 60 catalysts was tested under optimized conditions. The catalyst compositions were chosen to include solids which specific properties like oxygen storage capacity, oxygen mobility and ionic conductivity. The key parameters for high activity appear related to the presence of active and mobile surface oxygen species, and to an appropriate catalyst particle size in order to favour the number of contacts with the soot. In contrast, high oxygen storage capacity and bulk oxygen ion mobility do not appear as relevant properties for high catalytic activity. Nine new formulations were found to perform better than the reference catalyst “high surface area (HSA) ceria” (Rhodia). [Copyright &y& Elsevier]

Abstract: Ceria-based catalysts have been assessed for internal methane reforming at low temperature (400–600°C) in Solid Oxide Fuel Cell (SOFC). A combinatorial library of 15 metal (Cu, Pt, Ni) supported ceria was prepared using wet impregnation method. The ceria-based oxides are undoped or doped with metal transition (Zr) or by rare earth (Gd or Pr). The effect of the metal, the dopant and the surface area on the catalytic performances was investigated in high-throughput manner using a 16-parallel reactor. The catalysts were assessed in two different conditions, (i) in CH4 rich condition and (ii) in model reformate condition. Catalytic performances are very metal depending. In dry conditions, Cu-based catalysts do not produce H2 whereas Ni-catalysts are very active despite low carbon balance. However, when water and CO2 are added in the feed, the nature of the ceria plays an important role in the catalytic performances. At low temperature (T <550°C), most of Ni/ceria catalysts are not active under reformate conditions at low temperature while Pt catalysts appear more robust with respect to the conditions. From unsteady state parallel studies, we suggest that surface hydroxyl on ceria are the active species. [ABSTRACT FROM AUTHOR]