Gasification is struggling with challenges compared to the more maturely developed combustion technology, such as tar or other trace impurities, which cause operational problems for downstream gas utilization. STABILISE project encompasses characterization methods of raw, catalyst-supported feedstocks, char for its consideration as a catalyst for tar removal, methods of mathematical modelling for gasification process optimization, syngas chemical content detection, and methods for produced syngas quality improvement. STABILISE is an industry-preferred sustainable gasification technology upgrade with a remarkable local socio-economic impact. Its implementation should reduce the cost of operation and pollution control in the biomass-to-energy industry.