Catalytic Oxidation of Dichloromethane on γ-Al2O3: A Combined Flow and Infrared Spectroscopic Study

Catalytic combustion of chlorinated ethylenes over H‐zeolites

“…Jiang at al 30 found that CO was favoured in the oxidation of methylene chloride over acidic sulfated oxide catalysts. Similarly, van den Brink et al 31,32 found substantial quantities of CO during the decomposition of several chlorocarbons over g-alumina.…”

Synthesis and characterization of sol–gel zirconia supported Pd and Ni catalysts

“…The analysis technique allows the quantification of all reactants and products present in the gas phase having a dipolar moment different from zero. That is homomolecular diatomic molecules like Cl 2 and H 2 cannot be observed but chlorometanes, carbon oxides, partial oxidation products of the reactant as CH 3 OH, HCHO or HCOOH, HCl and H 2 O or even phosgene are easily detected, and all of them have been previously detected in the oxidation of DCM [6,[23][24][25][26]. A careful study of the gas phase IR spectra under steady state reaction conditions at different reaction temperatures studied in this work let us confirm the presence in the gas phase of DCM, CO x , HCl and H 2 O.…”

Investigation of the behaviour of a Pd/γ-Al2O3 catalyst during methane combustion reaction using in situ DRIFT spectroscopy

“…The assignment of the peak at 1460 cm À1 is as difficult as that of the band at 1590 cm À1 . However, based on literature data (Table 1), it can tentatively be ascribed to free carbonates ions on the alumina surface or to m-CO 3 2À species [60,[65][66][67][68][69]71,74,[76][77][78], without excluding the potential formation of hydrogenocarbonates [64,67] or surface methoxy groups [73]. The peak at 1460 cm À1 will therefore tentatively be assigned to carbonates species, likely in the monodentate conformation.…”

“…Very close (if not identical) wavenumber values are ascribed to different surface species, especially concerning the peak observed at 1590 cm À1 . If we consider the 1600-1575 cm À1 range, this band accounts either for formates [54,59,60,64,65,[68][69][70][71][72][73][74] or for carbonates species [67,[75][76][77]. Some authors do not even dare to definitely ascribe a peak of this region to a well-defined structure (see e.g.…”