This summary presents different global coal gasification systems suitable for making power from coal in a more efficient way. The systems make a clean gas called synthesis gas that can be used to generate electricity. The gasifiers discussed come in different types with unique ways of converting coal into gas. The summary also talks about the history of gasification and explains the performance of the gasifiers, like how much gas they make and how well they work. Overall, it provides a snapshot of the main types of gasifiers used around the world and how they play a role in making power from coal cleaner.