Innovative propane-nitrogen two-phase expander refrigeration cycle for energy-efficient and low-global warming potential LNG production

Nitrogen (N2) expander liquefaction process has the highest ecological and safety advantages over different types of available commercial natural gas liquefaction processes. However, its relatively low energy efficiency is a major issue. In this context, the optimum flow rate of propane as a high-boiling component with low-global warming potential was mixed with conventional refrigerant N2, resulting in a two-phase single mixed refrigerant...