TY - JOUR
TI - Concept of co-firing coal with biomass and natural gas: On track of sustainable solution for future thermal power plants
AU - Hodžić Nihad
AU - Smajević Izet
AU - Kazagić Anes
JN - Thermal Science
PY - 2016
VL - 20
IS - 4
SP - 1171
EP - 1184
PT - Article
AB - This paper presents R&D project of multi fuel concept (MFC) for future  coal-based power plants, demonstrated on example of cofiring Middle-Bosnia  brown coal with waste woody biomass and natural gas. Pulverised Combustion  (PC) lab-scale furnace has been used for the cofiring tests, varying up to  20%w portion of biomass and up to 10%th portion of natural gas in the fuel  mix. Tests were purposed to optimize the combustion temperature, air  distribution, including Over Fire Air System (OFAS), fuel combination and  fuel distribution, including reburning concept, as function of emissions and  combustion efficiency estimated through the ash deposits behaviours and  unburnt. Considering application of proposed MFC in case of TPP Kakanj unit 6  (118 MWe) set here as a referent power plant, temperature levels and fuel  distributions for lowest emissions of CO2 and NOx were found during lab  tests, provided that combustion efficiency is at an acceptable level. Derived  research results yield input data for calculation sustainability indicators  of MFC for the referent power plant, considering 6 fuel options - different  combinations of coal, biomass and natural gas. Single criteria analysis and  multicriteria sustainability assessment have been done, giving an advantage  to the options of cofiring coal with woody biomass and natural gas in the  case demonstrated.