**6. Summary**

Recently the Brisbane Airport of Australia made a partnership with Virgin Australia and the US fuel company of Gevo for a 2-year supply of bio-jet fuel produced by ATJ process to Virgin Australia and other Brisbane Airport-departing airlines, which approximately reached commercialization-capable level. However, economical feasibility is a prime concern before commercialization of bio-jet fuel and unit production cost is a major such index. For this, unit production cost of bio-alcohol is very important for its subsequent utilization as raw material of bio-jet fuel. As of 2011, unit retail price of ethanol produced by bio-chemical process from biomass was \$4.18/GGE (gallon for gasoline equivalent). On the other hand, minimum unit retail price for ethanol produced by thermochemical process was \$3.8 GGE. Butanol's unit retail price was \$0.34/kg produced by ABE fermentation process from corn of \$79.23/ton, while cellulosic raw material resulted in \$4.1/ GGE. For proper assessment of economic feasibility for ATJ conversion process, commercial production facility, upgrading process, and product distribution are primary considerations, which require intensive efforts for process upgrading.
