TY - JOUR
T1 - Characterisation of CO/NO/SO2 emission and ash-forming elements from the combustion and pyrolysis process
AU - Houshfar, Ehsan
AU - Wang, Liang
AU - Vähä-Savo, Niklas
AU - Brink, Anders
AU - Løvås, Terese
PY - 2014
Y1 - 2014
N2 - Bioenergy is considered as a sustainable energy which can play a significant role in the future's energy scenarios to replace fossil fuels, not only in the heat production, but also in the electricity and transportation sectors. Emission formation and release of main ash-forming elements during thermal conversion of biomass fuels at different conditions have been the scope of this study. The experiments were conducted in a quartz glass reactor where the temperature and atmosphere could be controlled. The selected fuels represent a wide range of biomass compositions. They are torrefied softwood, spruce bark, waste wood, miscanthus, and wheat straw. The fuels were first grinded and then pressed with a pellet maker into pellets of the same size and weight. For each fuel, the experiments were carried out under both oxidation and pyrolysis condition, with atmosphere of 3 % O-2 + 97 % N-2 and 100 % N-2, respectively, at four residence times. The selected temperatures under which experiments were performed are 800, 900, and 1,050 A degrees C. The concentration of SO2, NO, CO, and CO2 emissions and O-2 were monitored online by three analysers, simultaneously. The residue weight was measured after each process, and the comparison with the ash content of the fresh pellet is made. Additionally, the release of several ash-forming elements (K, Zn, Na, and Mn) from the fuels has been quantified as function of temperature and residence time by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma atomic emission spectroscopy (ICP-AES). Time-dependent formation of NO and SO2 and other emissions is presented and discussed with respect to different temperature and combustion conditions.
AB - Bioenergy is considered as a sustainable energy which can play a significant role in the future's energy scenarios to replace fossil fuels, not only in the heat production, but also in the electricity and transportation sectors. Emission formation and release of main ash-forming elements during thermal conversion of biomass fuels at different conditions have been the scope of this study. The experiments were conducted in a quartz glass reactor where the temperature and atmosphere could be controlled. The selected fuels represent a wide range of biomass compositions. They are torrefied softwood, spruce bark, waste wood, miscanthus, and wheat straw. The fuels were first grinded and then pressed with a pellet maker into pellets of the same size and weight. For each fuel, the experiments were carried out under both oxidation and pyrolysis condition, with atmosphere of 3 % O-2 + 97 % N-2 and 100 % N-2, respectively, at four residence times. The selected temperatures under which experiments were performed are 800, 900, and 1,050 A degrees C. The concentration of SO2, NO, CO, and CO2 emissions and O-2 were monitored online by three analysers, simultaneously. The residue weight was measured after each process, and the comparison with the ash content of the fresh pellet is made. Additionally, the release of several ash-forming elements (K, Zn, Na, and Mn) from the fuels has been quantified as function of temperature and residence time by inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma atomic emission spectroscopy (ICP-AES). Time-dependent formation of NO and SO2 and other emissions is presented and discussed with respect to different temperature and combustion conditions.
KW - Biomass and Waste
KW - Combustion
KW - ICP
KW - NOx/SO2
KW - Fast pyrolysis
KW - Single Particle Reactor
KW - Biomass and Waste
KW - Combustion
KW - ICP
KW - NOx/SO2
KW - Fast pyrolysis
KW - Single Particle Reactor
KW - Biomass and Waste
KW - Combustion
KW - ICP
KW - NOx/SO2
KW - Fast pyrolysis
KW - Single Particle Reactor
U2 - 10.1007/s10098-014-0762-3
DO - 10.1007/s10098-014-0762-3
M3 - Artikel
SN - 1618-954X
VL - 16
SP - 1339
EP - 1351
JO - Clean Technologies and Environmental Policy
JF - Clean Technologies and Environmental Policy
IS - 7
ER -