13C MAS NMR mechanistic study of propane conversion into butanes over H-MFI catalyst

Autor:	Irina I. Ivanova, E.B. Pomakhina, A. I. Rebrov, Eric G. Derouane
Rok vydání:	1999
Předmět:	chemistry.chemical_classification Reaction mechanism Chemistry Process Chemistry and Technology Disproportionation Butane Partial pressure Molecular sieve Catalysis chemistry.chemical_compound Hydrocarbon Propane Organic chemistry Physical chemistry Physical and Theoretical Chemistry
Zdroj:	Journal of Molecular Catalysis A: Chemical. 141:107-116
ISSN:	1381-1169
DOI:	10.1016/s1381-1169(98)00254-4
Popis:	The mechanism of propane conversion into butanes over H-MFI as catalyst has been investigated using controlled atmosphere 13 C MAS NMR spectrsocopy. The labelled reactant was propane 2- 13 C and the reactant loading was varied from 0.5 to 4 molecules per MFI unit cell. The nature of the primary labelled products was found to depend on the propane partial pressure. A high pressure of propane enhances its bimolecular disproportionation to ethane and both butane isomers. At low pressure, the formation of i-butane only is favoured. A detailed mechanistic pathway is proposed to account for both high pressure and low pressure observations. The proposed mechanisms were ascertained by studying the effect of several additional probe molecules (C3H6 2- 13 C , C6H6, H2, H2O and CO).
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::98a5a02eb55ac5b542c11fffaedca1fc https://doi.org/10.1016/s1381-1169(98)00254-4 Zobrazit plný text záznamu Full Text from ScienceDirect