Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
Collection
For ¥0.57 per day, unlimited downloads CREATE MEMBERSHIP Download

toTop

If you have any feedback, Please follow the official account to submit feedback.

Turn on your phone and scan

home > search >

Author:
Katarzyna Slopiecka   Pietro Bartocci   bartocci@crbnet.it   Francesco Fantozzi  


Journal:
Applied Energy


Issue Date:
2012


Abstract(summary):

Poplar cultivated with Short Rotation Forestry (SRF) technique could be an important source of biomass. This dedicated crop could be produced to obtain solid biofuel transformed through combustion, pyrolysis or gasification into heat and power in CHP plants. In this work a kinetic study of the slow pyrolysis process of poplar wood (populus L.) is investigated with a thermogravimetric analyzer. A comparison of selected non-isothermal methods for analyzing solid-state kinetics data is presented. The weight loss was measured by TGA in nitrogen atmosphere. The samples were heated over a range of temperature from 298 K to 973 K with four different heating rates of 2, 5, 10, 15 K min?. The results obtained from thermal decomposition process indicate that there are three main stages such as dehydration, active and passive pyrolysis. In the DTG thermograms the temperature peaks at maximum weight loss rate changed with increasing heating rate. The activation energy and pre-exponential factor obtained by Kissinger method are 153.92 kJ mol? and 2.14 × 1012 min?, while, the same average parameters calculated from FWO and KAS methods are 158.58 and 157.27 kJ mol? and 7.96 × 1013 and 1.69 × 1013 min?, respectively. The results obtained from the first method represented actual values of kinetic parameters which are the same for the whole pyrolysis process, while the KAS and FWO methods presented apparent values of kinetic parameters, because they are the sum of the parameters of the physical processes and chemical reaction that occur simultaneously during pyrolysis. Experimental results showed that values of kinetic parameters obtained from three different methods are in good agreement, but KAS and FWO methods are more efficient in the description of the degradation mechanism of solid-state reactions. The devolatilization process was mathematically described by first order single reaction. The results of the kinetic study can be used in modeling devolatilization process through computational fluid dynamics (CFDs) to simulate mass and energy balances.


Page:
491-497


VIEW PDF

The preview is over

If you wish to continue, please create your membership or download this.

Create Membership

Similar Literature

Submit Feedback

This function is a member function, members do not limit the number of downloads