simulation and modelling combustion biomass 20 optimization 7 biofuels 6 fluid boilers 6 carbon dioxide 5 more ... wastes 4 combustion products 4 internal combustion motors 4 stirring 3 fuels (transport) 3 computational fluid dynamics 3 dust particles 3 pyrolysis 3 heating gases 3 coal-burning power stations 3 coal 3 briquetting 2 tar 2 experiments 2 brown coal 2 imissions 2 quality 2 lignite 2 unconventional energy sources 2 nitrogen oxides 2 tyres 2 separation processes 2 water 2 less ...