Comparison of the reactivities of H{sub 3}PW{sub 12}O{sub 40} and H{sub 4}SiW{sub 12}O{sub 40} and their K{sup +}, NH{sub 4}{sup +} and Cs{sup +} salts in liquid phase isobutane/butene alkylation
Conference
·
OSTI ID:468000
- Institut de Recherches sur la Catalyse, Villeurbanne (France); and others
Aliphatic alkylation presents a great interest in petroleum refinery processes. Classic acid solid catalysts exhibit rapid deactivation. The aim of this work was to study different salts with varying compositions. Activity in n-butane isomerization reaction of various alkaline salts of H{sub 3}PW{sub 12}O{sub 40} and H{sub 4}SiW{sub l2}O{sub 40} was shown to be strongly dependent on the strength and number of accessible protons whereas the stability with time on stream was correlated to the presence of mesoporosity. For the liquid iC{sub 4}/C{sub 4}{sup =} continuous alkylation reaction, the strength and the number of acid sites appeared less important than the existence of mesoporosity indicating that the diffusion of the reactants and of the products plays an important role in this reaction.
- OSTI ID:
- 468000
- Report Number(s):
- CONF-960652--
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:467999