1. Department of Chemical Engineering, Universitas Riau; Kampus UR Panam; Pekanbaru Riau 28293 Indonesia
2. School of Engineering and Information Technology; Murdoch University; 6150 WA Australia
3. School of Science and Engineering; Teesside University; Middlesbrough United Kingdom
4. Universitas Teknologi Yogyakarta, and AMCS Research Center; Yogyakarta Indonesia
5. Department of Physics; Institut Teknologi Bandung (ITB); Bandung Indonesia
6. Indonesian Institute of Sciences (LIPI); Serpong; Tangerang Indonesia