Quantum Lasers Enhance Biomass Recycling in Vienna

Researchers at TU Wien (Vienna), Austria, have developed a novel method using quantum cascade lasers to improve biomass recycling. The technology addresses the challenge of accurately measuring water vapor content in product gases during gasification, a critical step in producing valuable chemicals from waste. Traditional infrared methods struggle with water vapor detection due to interference from other hydrocarbons. The team employed terahertz radiation from quantum cascade lasers, which are specifically absorbed by water molecules, enabling precise measurements. This compact, portable device offers reliable results across varying temperatures and water vapor concentrations. The innovation promises more efficient and environmentally friendly biomass recycling by allowing for better monitoring and regulation of the gas production process. Experiments using waste wood at TU Wien validated the method's effectiveness, paving the way for further advancements in terahertz technology for detecting other gas components.