Hydrothermal Gasification (HTG)

Hydrothermal Gasification (HTG) is a high-temperature process that converts wet organic matter into gaseous products—primarily methane, hydrogen, and carbon dioxide—using supercritical water as the reaction medium. The process typically occurs at temperatures above 375 °C and pressures above 22 MPa, conditions under which water becomes supercritical, enhancing the solubility and reactivity of organic compounds. HTG enables the efficient conversion of wet biomass without the need for drying and is especially suited for low-energy-density wastes such as sewage sludge or food waste. Depending on the catalysts and process conditions used, the gas output can be optimized for energy generation, hydrogen production, or synthetic natural gas, making HTG a versatile solution in sustainable energy systems.