1. Introduction
The energy crisis is becoming a global issue. Hydrogen, as a clean and efficient renewable energy, is considered to be the best alternative to fossil fuels [1-41. However, commercializa- tion of hydrogen energy is hampered by a cost-intensive process. Hythane, a mixture of hydrogen and methane, has attracted sig- nificant attention as a transit form of pure hydrogen in the near term [5]. With the addition of hydrogen to methane, hythane has been noted to exhibit obvious advantages over compressed nat- ural gas as a vehicle fuel, such as extended flammability range, shortened quenching distance, reduced greenhouse gas emissions,