Heterogeneous oxidation effects material

The available data concerning the effect of metal compounds on the pyrolysis and combustion of polymeric materials show that there is a great potential in the control of these materials, This field is still in its embryonic stage. Much is yet unclear. In many cases the analysis is rendered difficult because of the dual function of metal compounds (especially of the d- and f-types) in redox reactions. Their ability not only to inhibit but also to promote polymer decomposition manifests itself most clearly in concentration effects The specific effects of certain metal compounds on the ignition and combustion rate of polymers indicate that heterogeneous oxidation... 

The related Au/Ce02—AI2O3 catalyst was reported to be effective for the heterogeneous oxidation of 1-tetradecanol, used as a model to test the catalytic potential of the material toward other fatty alcohols. All the reac-... 

Nanoparticles, which often show enhanced catalytic abilities [32, 33] unusual optical properties [34], and novel quantum size effects [35], have been widely used in fields such as catalysis [36, 37], sensing [38], optoelectronics [39], and microelectronics [40]. Nanoparticle catalysis is industrially and experimentally important because a large variety of C-C coupling [41] and alcohol oxidation [32] can be effectively catalyzed by nanoparticles. In this part, we will present a brief review on recent advances in supported nanoparticle heterogeneous catalysts on various mesoporous materials. Heterogeneous nanoparticle catalysts have several... 

Transesterification Reactions. The heterogeneous acid-catalyzed transesterification of TGs has not been investigated as much as its counterpart, the base-catalyzed reaction. Various solids are available with sufficient acid strength to be effective catalysts for the named reaction. Among the solid acids available are functionalized polymers, such as the acid forms of some resins, as well as inorganic materials, such as zeolites, modified oxides, clays, and others. Some of these solids have already been found to be effective in transesterification reactions of simple esters and (3-ketoesters. 

Although the role of crystalline phases in the leachability of HT materials is unclear and must be examined from case to case, the identified silicates and oxides are overall more resistant to corrosion than silicate glass and residues of incineration (Scholze 1991). Thus, a clear assessment of the durability of HT materials as a function of crystalline components must take into account the combined effects of their enrichment or depletion in trace metals, their individual leachability, the increase (but sometimes decrease) in overall reactivity due to local heterogeneities and increased Sspec (Jacquet-Francillon et al. 1982 Bickford Jantzen 1984 Jantzen Plodinec 1984 Scholze 1991 Adams 1992 Sproull et al. 1994 Sterpenich 1998). 

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