Exhaustive dehydrogenation

Exhaustive dehydrogenation, 139-140, 338 Expansion of rings. See Ring expansion Extrusion of carbon dioxide, 80 of carbon monoxide, 78, 330 of molecular nitrogen, 35, 331, 334 of sulfur, 35, 38-39, 59-60, 80, 261, 334, 338 of sulfur dioxide, 80... 

The regeneration is done with air that has been preheated through a direct fired burner or, alternatively, with the exhaust of a gas turbine. The regeneration step is intended to preheat the catalyst to the onstream temperature necessary to initiate the next process cycle and to remove coke deposits on the catalyst. Flue gas sensible heat may be recovered in a waste heat boiler. The hydrogenation step prepares the catalyst for the dehydrogenation phase and also contributes additional heat from the reduction of Cr to Cr. ... 

Supported metal clusters play an important role in nanoscience and nanotechnology for a variety of reasons [1-6]. Yet, the most immediate applications are related to catalysis. The heterogeneous catalyst, installed in automobiles to reduce the amount of harmful car exhaust, is quite typical it consists of a monolithic backbone covered internally with a porous ceramic material like alumina. Small particles of noble metals such as palladium, platinum, and rhodium are deposited on the surface of the ceramic. Other pertinent examples are transition metal clusters and atomic species in zeolites which may react even with such inert compounds as saturated hydrocarbons activating their catalytic transformations [7-9]. Dehydrogenation of alkanes to the alkenes is an important initial step in the transformation of ethane or propane to aromatics [8-11]. This conversion via nonoxidative routes augments the type of feedstocks available for the synthesis of these valuable products. 

---