Abstract:
This research investigated the effect of lanthanum (La) modified alumina-silica catalyst to ethanol dehydration by varying amount of La in catalysts from 0.5 to 3 wt% that was prepared by wet impregnation method. La-doped alumina-silica catalysts were characterized by XRD, SEM, EDX, NH3-TPD, TGA methods and were studied catalytic activity in ethanol dehydration during 200 400 ◦C with fixed bed reactor. Activity was represented through with ethanol conversion and product selectivity. A remarkable catalyst was tested about stability. From a result, it was found that La was highly dispersed form without basic phase structure transformation. The weak acid was increased, whereas the medium-strong acid site tended to decline after addition. Weak and medium-strong acid sites correlated with selectivity of products that was explained that diethyl ether was raised while ethylene became lower. From stability of catalyst, no transformation about activity was found for 19 hours. The coke deposition on a surface of catalyst reversed to the amount of La loading