Abstract
HZSM-5 has the potential in the dehydration of ethanol to gasoline (ETG) because of its acid property and shape selectivity. HZSM-5 had been used as the support of phosphorus oxide for ethanol dehydration, which resulted in the production of oil in the gasoline range. It can be noticed that the moderate pore size of HZSM-5 limits the production of heavier oils in the kerosene and gas oil ranges. Therefore, in this work, the large pore size zeolites, HY, and HBeta, were expected to produce larger hydrocarbon molecules. Then, bio-ethanol dehydration using HY and HBeta doped with phosphorus oxide was investigated, aiming to improve the production of distillate-range products. The reaction was carried out in an isothermal fixed-bed reactor. The temperature was controlled at 500 °C, and the LHSV was fixed at 0.5 h-1. Phosphorusoxide (5 %wt) was loaded to all zeolites using incipient wetness impregnations. The characterizationtechniques; XRD, XPS, SAA, were used to characterize the catalysts. The products were analyzed by using GC, GC×GC-MS/TOF and SIMDIST GC. As a result, it was shown that HBeta (modified and unmodified) gave the greater selectivity to kerosene and gas oil than HZSM-5 that gave gasoline mostly. On the other hand, HY gave the LVGO, and HVGO than other supports. Moreover, Kerosene and gas oil was improved when introducing phosphorus oxide to zeolite.
