Stereodynamic effects in the absorption of propylene molecules on Ag(001)

Article Abstract:

A report on the experimental evidence of the role of rotational alignment of the gas-phase molecules in the interaction of propylene with Ag(001) is presented. The findings suggest that the absorption process is mediated by a nonthermal precursor state which survives long enough to allow molecules to sample, on the average, at least seven sites around the initial impact position.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Silver, Analysis, Absorption

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A quantum chemical study of comparison of various propylene epoxidation mechanisms using [H.sub.2][O.sub.2] and TS-1 catalyst

Article Abstract:

A comparison of several prominent olefin epoxidation mechanisms at same level of theory is presented, where all the pathways are investigated for propylene epoxidation only. The implications of different Ti site models are discussed in order to explain the nature of external/internal and nondefect/defect sites of Ti-containing MFI-type silicalite (TS-1).

Science & research, Research, Quantum chemistry

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Iron-Catalyzed propylene epoxidation by nitrous oxide: Studies on the effects of alkali metal salts

Article Abstract:

A study is performed on iron catalysts with and without alkali metal salt modifications for propylene oxidation by nitrous oxide. UV-Vis, XANES and Raman spectroscopy techniques revealed that the modification with KCI increased the dispersion of the iron species and changed the local coordination of iron into a tetrahedral configuration.

Industrial Gas Manufacturing, Industrial gases, Nitrous Oxide, Alkali metal compounds

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