| บทคัดย่อ(English) |
This thesis concerns with the synthesis of ethyl ~itert~i-butyl ether(ETBE) from the liquid phase reaction between ethanol (EtOH) and~itert~i-butyl alcohol (TBA) by using synthesized beta zeolite with Si/Alratio of 36 and commercial beta zeolite with Si/Al ratio of 13.5 and 55. Itwas found that all beta zeolites with different Si/Al ratio offer almostthe same conversion and selectivity of ETBE. However, the beta zeolite withthe Si/Al ratio of 55 was selected for the following studies, as it isavailable in commercial market and present in a ready-to-use form. Betazeolite supported on monolith support was used in the kinetic and reactivedistillation studies. The reaction was carried out in a semi-batch reactorin the temperature range of 343-363 K to obtain the parameters of thereaction rate constant and the water inhibition coefficient. In the reactive distillation study, the supported beta zeolite wasplaced in the middle of the column and stainless steel packing material wasused in the top and the bottom sections of the column. Results under thestandard operating condition indicate that the conversion and theselectivity are 60.5 and 27.7%, respectively. In addition, variousoperating parameters such as condenser temperature, total molar feed flowrate, reflux ratio, heat duty and mole ratio of H(,2)O:EtOH were simulatedto find the effects on the reactive distillation performance by using AspenPlus. |