Liquids and gases are conventionally separated using methods such as gravity-based, centrifugal separators, and coalescing filters. However, these methods encounter challenges related to efficiency and maintenance when dealing with smaller droplets. The emergence of supersonic separators represents a significant technological leap in this field. These separators leverage supersonic expansion and cyclonic separation to achieve enhanced efficiency without the reliance on rotating parts. This advancement is particularly advantageous in scenarios with space limitations and offshore applications due to its compact form factor and lower energy consumption. The intended operation of a supersonic separator involves the expansion of feed gas through a Laval nozzle, followed by the cooling and condensation of target components like water vapor and heavy hydrocarbons, and ultimately the separation of these components using an integrated cyclonic gas/liquid separator. Despite the merits, which include reduced maintenance and high efficiency, it is imperative to address challenges such as pressure drops and dependencies on gas composition. The optimal performance of this technology hinges on precise nozzle design and operating conditions. Significant enhancements in the design and efficiency of supersonic separators have been achieved through recent research and computational modeling. These advancements encompass the refinement of nozzle geometries and the optimization of operational parameters utilizing tools such as MATLAB and HYSYS. Consequently, these endeavors have substantially augmented the comprehension and operational adaptability of supersonic separators, rendering them increasingly indispensable in natural gas processing and other applications necessitating efficient gas–liquid separation.