A thermogravimetric analyzer (Setsys-1750, Setaram) coupled to
an FTIR spectrophotometer (Bruker Vector 22) was employed to
investigate the mass loss of lignins and the formation of typical
volatiles About 20 mg lignin sample was placed into the furnace and
heated at a heating rate of 20 C/min within the temperature range
from the ambient temperature to 900 C under a nitrogen flow of
20 mL/min to maintain an inert atmosphere. The FTIR instrument
was connected to the thermogravimetric analyzer by a pipe and a
flow cell, which were preheated to 180 C to prevent condensation of
the evolved gases . By means of the FTIR real-time tracking on the
pyrolysis gases, the spectra for volatile evolution during lignin pyrolysis can be recorded bymeans of the FTIR real-time tracking mode with the scanning range from 4000 to 400 cm1
.