Characteristics and synergistic effects of co-combustion of carbonaceous wastes with coal

WOS: 000423248500022PubMed ID: 29097128This study presents combustion behavior and emission results obtained for different fuels: poultry litter (PL) and its char (PLC), scrap tires (ST) and its char (STC) and blends of char/lignite (PLC/LIG and STC/LIG). The combustion parameters and emissions were investigated via a non-isothermal thermogravimetric method and experiments in a lab-scale reactor. Fuel indexes were used for the prediction of high temperature corrosion risks and slagging potentials of the fuels used. The addition of chars to lignite caused a lowering of the combustion reactivity (anti-synergistic effect). There was a linear correlation between the NO,, emissions and the N content of the fuel. The form of S and the concentrations of alkali metals in the fuel had a strong effect on the extent of SO2 emissions. The use of PL and PLC in blends reduced SO2 emissions and sulphur compounds in the fly ash. The 2S/C1 ratio in the fuel showed that only PLC and STC/PLC would show a risk of corrosion during combustion. The ratio of basic to acidic oxides in fuel indicated that ST, STC and STC/LIG have low slagging potential. The molar (Si + P + K)/(Ca + Mg) ratio, which was used for PL, PLC and PLC containing blends, showed that the ash melting temperatures of these fuels would be higher than 1000 degrees C. (C) 2017 Elsevier Ltd. All rights reserved.European Biofuels Research Infrastructure for Sharing Knowledge (BRISK) [284498]; European CommissionEuropean Commission Joint Research Centre; Ege UniversityEge University [2014 Fen 032]This work was part of the research activities carried out in the framework of the "European Biofuels Research Infrastructure for Sharing Knowledge (BRISK)" (www.briskeu.com) project (contract nr. 284498). The European Commission is acknowledged for co-funding the work. The financial support from Ege University under contract 2014 Fen 032 is also gratefully acknowledged