The study focuses on improvements in coal gasification technology called Prenflo, similar to the Shell method, where coal is turned into gas. This technology, along with Integrated Gasification Combined Cycle (IGCC), which has been around since the 1970s, is a way to produce energy. Prenflo uses a specific process to change coal into gas quickly. IGCC builds on this idea to create more efficient power plants. The research goes over the history, features of Prenflo, and advancements in IGCC, showing how this technology has evolved over time to make energy production cleaner and more effective.