Isotopic studies on the dehydroalkylation of toluene with ethane

An investigation on the selective hydrodealkylation of C9+ aromatics over alkali-treated Pt/H-ZSM-5 zeolites

“…hindrance as compared with ET isomers, 39 and (2) the hydrodealkylation of ET isomers to toluene and ethane is kinetically strongly preferred as the dissociation energies of alkyl groups on the benzene ring are lower than those of TMB isomers. 40 Interestingly, after the 120 min of alkali treatment, the TMB recovery yield is anomalously increased up to 95.4%, which is similar to that of the untreated Pt/H-ZSM-5 (Pt/H-ZSM-5IJ0)). This result implies that the silicon species extracted from the ZSM-5 framework would be readily converted into amorphous siliceous species under prolonged alkali-treatment time, which would tightly scatter on the surface without any aggregation as well as partially or totally cover some of the pores (Scheme 1).…”

Production of High-Octane Fuel Components by Dehydroalkylation of Benzene with Mixtures of Ethane and Propane

“…The alkylation of benzene with ethane is very selective. Mainly, the primary alkylation product ethylbenzene is formed with small amounts of the secondary product toluene, which probably originates from hydrogenolysis of ethylbenzene. , Thus, the RON of the liquid product phase (denoted with b in Figure ) is, with a value of 124, rather high. However, because the benzene conversion is low, the RON of the total liquid with unconverted benzene (blending RON of 99) is only 102.…”