Production and Characterization of Bio-Chars from Biomass via Pyrolysis
Ayhan Demirbas

Abstract

This article deals with slow pyrolysis of oak wood and agricultural residues such as hazelnut shell and wheat straw at high temperature (950–1250 K) in a cylindrical reactor. The aim of this work is to study the effect of the treatment conditions such as temperature, particle size, and lignin and inorganic matter contents on bio-char yield and reactivity. When the pyrolysis temperature increased, the bio-char yield decreased. A high temperature and smaller particles increase the heating rate resulting in a decreased bio-char yield. The higher lignin content in hazelnut shell results in a higher bio-char yield in comparison with oak wood and wheat straw. Bio-chars from hazelnut shell and wheat straw are more reactive in gasification than bio-chars from oak wood because of the higher ash content. The bio-char obtained are carbon rich, with high heating value and relatively pollution-free potential solid biofuel.

Keywords
biomass, pyrolysis, bio-char, reactivity
References

Journal Energy Sources, Part A: Recovery, Utilization, and Environmental Effects
Publisher Taylor & Francis
ISSN 1556-7036 (Print) 1556-7230 (Online)
Subject Energy Policy and Economics
Issue Volume 28, Number 5/April 1 2006
Category Original
DOI 10.1080/009083190927895
Pages 413-422
Online Date Thursday, March 02, 2006