1. Center
of Excellence in Nanotechnology and Chemical Engineering Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
2. Chemical
Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta,
Midori-Ku, Yokohama 226-8503, Japan
3. Research and Development Center, Saudi Aramco, Dhahran 31311, Saudi Arabia