2013, №4

сс. 4-14

Conversion of isobutane-butenes mixtures on H-USY and SO42+/ZrO2 catalysts under supercritical conditions: isobutane alkylation and butenes oligomerization

2013, №4

сс. 4-14

Цитировать

A.E. Koklin, V.M.Kh. Chan, V.I. Bogdan

Key words: isobutane, butenes, alkylation, oligomerization, sulfated zirconia, ultrastable zeolite Y, supercritical conditions

Conversion of isobutane-butenes mixtures is studied on the H-USY and SO42+/ZrO2 catalysts under supercritical conditions at 150—160 °C and 80 atm. Isobutane/C4-olefins ratio (I/O) was 1.5, 14 and 28. In the alkylation of isobutane (I/O = 14 and 28) sulfated zirconia is more stable: at 150 °C and 80 atm the olefin conversion above 90 % is kept for 5 hours. In the same conditions zeolite catalyst deactivation starts within 1—2.5 hours depending on the initial I/O ratio. The selectivity to C8-hydrocarbons is 30—40 %. The increasing initial concentration of butenes leads to the dominance of their dimerization over alkylation of isobutane.

doi:10.1134/S1990793114080089