1. a Department of Chemical Engineering , Yuan‐Ze Institute of Technology , Nei‐Li, Taoyuan, Taiwan, R. O. C. , 320
2. b Department of Chemical and Environmental Engineering , Lien‐Ho Junior College of Technology , Miao‐Li, Taiwan, R.O.C. , 360
3. c Department of Chemical Engineering , Shuh‐Der Junior College of Technology , Taichung, Taiwan, R.O.C. , 414