Ethylene is one kind of important material for petrochemical industry and is mainly derived from thermal cracking of petroleum or nature gas feedstock. The cracking process requires high temperature of 600–1000 8C. In recent years with the shortage of naural resource and energy, and also with the soaring prices of crude oil, the way of bio-ethanol catalytic dehydration to ethylene has been paid more and more attention compared with the traditional route because of some advantages, such as the reduction of CO2 emission [1,2], low production cost and energy consumption.