1. Assistant Professor, Dept. of Chemical Engineering, College of Engineering Studies, Univ. of Petroleum and Energy Studies, Energy Acres, Bidholi, Dehradun, Uttarakhand 248007, India (corresponding author).
2. Senior Professor, Dept. of Chemical Engineering, College of Engineering Studies, Univ. of Petroleum and Energy Studies, Energy Acres, Bidholi, Dehradun, Uttarakhand 248007, India.