Dry flue gas was analyzed with trad

Dry flue gas was analyzed with traditional on-line analyzers
(O2, CO2, CO, NO, SO2), and wet and hot (180 -C) flue gas
with an FTIR spectrometer (CO2, CO, NO, SO2, CH4, NO2,
H2O, HCl). The FTIR results for CO2, CO, NO and SO2 were
usually in good agreement with the results of on-line analyzers.
Deposit samples were analyzed from wind and lee-sides by
scanning electron microscopy (SEM) and energy dispersive
spectrometry (EDS) at A°
bo Academi University (see elsewhere,
[16]). In most of the experiments, where the mass of
collected deposit was sufficiently high, deposits at 50- up from
the center of the wind-side position were analyzed as well. The
tube area 30–90- up from the wind-side, where deposit
thickness is lowest, is especially sensitive to corrosion. Deposit
surface temperature increases with thickness. The molten
phase, if it exists, tends to diffuse towards the thinner parts
of deposits, increasing the corrosion. Volatile corrosion
products are most easily released in the area where the deposit
thickness is lowest [18]. In most experiments, spot analyses
made by SEM EDS were carried out from lee-side deposits.