Physico-chemical properties of MoO3/ZrO2 catalysts prepared by dry mixing for isobutane alkylation and butene transformations

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Sh.O. Omarov, E.A. Vlasov, D.A. Sladkovskiy, K.V. Semikin, A.N. Matveyeva, S.P. Fedorov, G.V. Oganesyan, D.Yu. Murzin
Publiceringsår: 2018
Tidskrift: Applied Catalysis B: Environmental
Tidskriftsakronym: Appl. Catal., B
Volym: 230
Artikelns första sida, sidnummer: 246
Artikelns sista sida, sidnummer: 259
eISSN: 1873-3883


Abstrakt

MoO3/ZrO2 catalysts were prepared either by wet impregnation or tableting dry mechanical mixtures of corresponding zirconium hydroxide and molybdenum containing precursors. It was shown that synthesis parameters influence the phase composition, structure, nature and strength of the acid sites. The structural and textural properties of MoO3/ZrO2 catalysts were characterized by a range of techniques including DTA, XRD, N2-physisorption, pH-measurements, selective adsorption of a series of acid-base indicators and FTIR spectroscopy of adsorbed pyridine. It is shown that an increase in the concentration of MoO3 gave a rise to Brønsted acidity concomitant with an increase of 1-butene conversion in isobutane alkylation and butene dimerization. Introduction of up to 6.6% of MoO3 resulted in sharp changes in physico-chemical properties as well as in catalytic behaviour allowing generation of products with an increased content of C8 compounds because of alkylation and dimerization. A further increase of MoO3 content to 13.2% predominantly led to isomerization of 1-butene to 2-butene which can be related to elevated Brønsted acidity.


Senast uppdaterad 2019-20-10 vid 04:19