Neopentane and solid acids: Direct hydron exchange before cracking

Article Abstract:

The hydrogen/deuterium (H/D) exchange reaction of 2,2-dimethylpropane (neopentane) over [D.sub.2]O-exchanged zeolites is investigated using a batch recirculation reactor by means of gas chromatography coupled with mass spectrometer. Findings suggest that H/D exchange between solid acids and neopentane is only possible through a carbonium ion since no primary product from oxidation can be stabilized by fast deprotonation/reprotonation process.

Analytical Laboratory Instrument Manufacturing, Analytical instruments, Ion Mass Spectroscopy, Usage, Spectra, Mass spectrometry, Deuterium, Structure

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Alkaline treatment of iron-containing MFI zeolites. Influence on mesoporosity development and iron speciation

Article Abstract:

The effect of alkaline treatment on the mesoporosity development and iron speciation in Fe-MFI zeolites is investigated. Iron in framework positions has shown to provoke mesopore formation, whereas nonframework iron species suppresses silicon leaching and lowers the extent of extra porosity.

Spain, Iron compounds, Properties, Atomic properties

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