1. Departmentof Chemical Engineering, Gadjah Mada University, Jalan Grafika 2, Yogyakarta 55281, Indonesia
2. Department of Chemical Engineering, Sultan Ageng Tirtayasa University, Cilegon 42435, Indonesia
3. Center of Excellence in the Department of Nanotechnology and Chemical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia