Thermal behaviour and kinetics of alga Polysiphonia elongata biomass during pyrolysis

Copyright © 2014 Elsevier Ltd. All rights reserved..

The pyrolysis characteristics and kinetics of Polysiphonia elongata were investigated using a thermogravimetric analyzer. The main decomposition of samples occurred between 225 °C and 485 °C at heating rates of 5-40 °C/min; owing to release of 78-82% of total volatiles. The heating rate effected pyrolysis characteristics such as maximum devolatilization rate and decomposition temperature. However, total volatile matter yield was not significantly affected by heating rate. The activation energy of pyrolysis reaction was calculated by model free Friedman and Kissenger-Akahira-Sunose methods and mean values were 116.23 kJ/mol and 126.48 kJ/mol, respectively. A variance in the activation energy with the proceeding conversions was observed for the models applied, which shows that the pyrolysis process was composed of multi-step kinetics. The Coats-Redfern method was used to determine pre-exponential factor and reaction order. The obtained parameters were used in simulation of pyrolysis process and results were in a good agreement with experimental data.

Media Type:

Electronic Article

Year of Publication:

2014

Publication:

2014

Contained In:

To Main Record - volume:171

Contained In:

Bioresource technology - 171(2014) vom: 15. Nov., Seite 193-8

Language:

English

Contributors:

Ceylan, Selim [Author]
Topcu, Yıldıray [Author]
Ceylan, Zeynep [Author]

Links:

Volltext

Keywords:

Biofuels
Biomass
Journal Article
Kinetics
Macro algae
Polysiphonia elongata
Pyrolysis

Notes:

Date Completed 08.06.2015

Date Revised 29.09.2014

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.biortech.2014.08.064

funding:

Supporting institution / Project title:

PPN (Catalogue-ID):

NLM241651263