combustion biomass 43 simulation and modelling 42 fuels (chemistry) 18 combustion physics 17 air pollution 15 coal 14 more ... wastes 13 issues 12 internal combustion motors 11 fluid boilers 10 imissions 10 optimization 10 steam boilers 10 combustion products 10 heating 10 waste disposal services 9 biofuels 8 physical chemistry 8 solid fuel boilers 8 carbon dioxide 8 mechanical engineering 8 pyrolysis 7 brown coal 6 heat-generating plants 6 solid fuels 6 environmental pollution 6 chemical technology 5 boilers 5 machines 5 less ...