 Supercritical water gasification is a promising technology for converting wet biomass into a product gas that can be used as substitute natural gas, SNG. It uses water in its supercritical state, which has drastically different physical properties than when it is in its liquid form. The process is also faster than traditional gasification processes, requiring only a few minutes of residence time. Research on this technology dates back to the 1970s, with many studies conducted since then. This article was authored by owner Sol Yacoboyla, John Herringk, K. G. Smit and others.