Gasification of lignocellulosic biomass char obtained from pyrolysis: Kinetic and evolved gas analyses

D. López-González, M. Fernandez-Lopez, J.L. Valverde and L. Sanchez-Silva

Energy, 2014, vol. 71, issue C, 456-467

Abstract: Pyrolysis and gasification processes of three types of lignocellulosic biomass (Eucalyptus wood, fir wood and pine bark) and biomass main components (cellulose, xylan and lignin) were studied by thermogravimetric-mass spectrometric analysis. Biomass samples were pyrolyzed between 30 °C and 1000 °C obtaining a solid fuel (char) that was later gasified using steam as the reacting agent (5% vol.). The gasification temperature was set at 900 °C. Biomass samples reactivity profiles showed a catalytic effect at high conversion values, which was correlated with their ash composition. Three models were used to reproduce the gasification process. Cellulose and pine bark samples were the only ones that properly fitted to these models. This fact was attributed to their low ash content. This way, a semi-empirical model for predicting the gasification rates including the catalytic effect of ashes was proposed, which highly improved the obtained fitting. H2, CO and CO2 were the main products obtained. Furthermore, the detection of CH4 indicated the existence of methanation reactions. NOx were also observed, indicating that nitrogen was retained in the char after the pyrolysis process.

Keywords: Lignocellulosic biomass; TGA-MS; Char; Pyrolysis; Gasification; Kinetics (search for similar items in EconPapers)
Date: 2014
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (24)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544214005362
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:71:y:2014:i:c:p:456-467

DOI: 10.1016/j.energy.2014.04.105

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().