1. Department of Environmental Engineering, Kongju National University, 1223-24 Cheonan-daero, Cheonan-si, Chungnam 31080, Republic of Korea
2. Clean Fuel Laboratory, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
3. Department of Energy and Resources Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan 49112, Republic of Korea