The role of propanal in the reaction of 2-propen-1-ol in H-ZSM-5
- Univ. of Pennsylvania, Philadelphia, PA (United States); and others
The adsorption of 2-propen-1-ol and propanal has been studied in H-ZSM-5 using simultaneous temperature programmed desorption (TPD) and thermogravimetric analysis (TGA) measurements and {sup 13}C NMR. For both adsorbates, the TPD-TGA results for both molecules form a large number of complex products. However, for low exposures, less than one molecule/Broensted site, the initial products can be observed. For 2-propene-1-ol, the initial reaction product, formed between 400 and 425 K, is propanal, formed through either a secondary cation or an epoxide intermediate. The intact desorption of propanal at low coverages was also observed in this temperature range. {sup 13}C NMR spectra of 2-propen-1-ol confirm the formation of propanal and condensation products of propanal. Finally, a potential energy model based on gas-phase proton affinities of the various conjugate bases along possible reaction coordinates for the reaction of 2-propen-1-ol explain the observed chemistry well. 21 refs., 7 figs., 1 tab.
- OSTI ID:
- 111015
- Journal Information:
- Journal of Catalysis, Vol. 154, Issue 2; Other Information: PBD: Jul 1995
- Country of Publication:
- United States
- Language:
- English
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