Isomerization of 1-butene over SAPO-11 catalysts synthesized by varying synthesis time and silica sources

Ville Nieminen, Narendra Kumar, Teemu Heikkilä, Ensio Laine, Jose Villegas, Tapio Salmi, Dmitry Yu. Murzin*

*Korresponderande författare för detta arbete

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

29 Citeringar (Scopus)

Sammanfattning

A series of SAPO-11 catalyst samples were synthesized by varying source of silica and synthesis time. Products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption and FTIR spectroscopy of pyridine adsorption as well as evaluated towards 1-butene skeletal isomerization. By using waterglass as a source of silica, tridymite phase instead of SAPO-11 was obtained. The combination of colloidal silica and aluminum oxide as sources of silica and alumina resulted in SAPO-11 phase but small amounts of other phases, such as tridymite, were obtained. The number of the acid sites was observed to increase if synthesis time was prolonged indicating more silicon incorporation into the framework. Acidity and phase distribution had an influence on the conversion of 1-butene and selectivity to isobutene. The selectivity to isobutene was higher with catalysts, which contained more SAPO-11 phase.

OriginalspråkEngelska
Sidor (från-till)227-234
Antal sidor8
TidskriftApplied Catalysis A: General
Volym259
Utgåva2
DOI
StatusPublicerad - 15 mar 2004
MoE-publikationstypA1 Tidskriftsartikel-refererad

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