comparative kmetlc mvestlgatlon of the homogeneous and heterogeneous dye-sensltlzed photooxygenation of 2,3&methyl-2-butene and 2-methyl-2-butene m two photochemIcal reactors namely In the anular reactor and m a cylmdncal reactor of ongmal design Inside an elbphcal muror, IS reported The mertts of these two laboratory photochemIcal reactors are discussed with particular emphasis on theu mass transfer performances 3 m this gas-bquid and gas-hqtnd-solid reactlon Two types of regimes eX]st dynanuc and chemical m which the reachon takes place accordmg to the expertmental conditions In the anular reactor the presence of a wide dynamic rbgtme IS a severe hindrance for an adequate chemical kmehc analysis
The cybndrlcal reactor with special features for speeding up the mass transfer rate IS a conslderable tmprovement as shown by d higher preclslon of the kmetlc constants calculated through a statlstlcat approach Ttus cylntdrlcal reactor was also used as a slurry phase reactor with methylene blue supported on silica gel as a photosensltlzer The stnglet oxygen production and quenching rates on the heterogeneous photoscnsltlzer were then computed