REAL

Pyrolysis of Untreated and Various Torrefied Stem Wood, Stump, and Bark of Norway Spruce

Barta-Rajnai, Eszter and Sebestyén, Zoltán and Pekkerné Jakab, Emma and Patus, Eszter and Bozi, János and Czégény, Zsuzsanna (2019) Pyrolysis of Untreated and Various Torrefied Stem Wood, Stump, and Bark of Norway Spruce. ENERGY & FUELS, 33 (4). pp. 3210-3220. ISSN 0887-0624

[img]
Preview
Text
EnergyFuel_2019_33_3210_3220_Realba.pdf

Download (1MB) | Preview

Abstract

The effect of torrefaction severity (temperature and residence time) was studied on the thermal decomposition of different parts of Norway spruce (stem wood, stump, and bark). The volatile content of the torrefied samples was characterized by pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS). The tendencies of the intensities of the most characteristic pyrolysis products of the untreated and torrefied samples have been compared. The Py-GC/MS results are interpreted in terms of the chemical composition changes (cellulose and hemicellulose). It was found that the alkali ions do not catalyze the thermal decomposition of hemicellulose contrary to cellulose. The results of the Py-GC/MS analysis demonstrated that the yields of acetic acid and other compounds of low molecular mass were reduced in the pyrolyzates of each torrefied sample, including the treatment at 225 °C. Principal component analysis has been used to reveal correlations between the torrefaction temperature, residence time, and product distribution of the samples. The torrefied stem wood and stump behaved similarly during torrefaction; therefore, they can be used together in thermochemical conversion applications. However, the torrefaction of bark requires about a 25 °C lower torrefaction temperature than stem wood and stump. © 2019 American Chemical Society.

Item Type: Article
Additional Information: Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, Budapest, H-1117, Hungary SINTEF Energy Research, Sem Sælands vei 11, Trondheim, NO-7034, Norway Department of Energy and Process Engineering, Norwegian University of Science and Technology (NTNU), Kolbjørn Hejes vei 1B, Trondheim, NO-7491, Norway Export Date: 3 May 2019 CODEN: ENFUE Correspondence Address: Czégény, Z.; Institute of Materials and Environmental Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Magyar tudósok körútja 2, Hungary; email: czegeny.zsuzsanna@ttk.mta.hu
Uncontrolled Keywords: CELLULOSE; Plants (botany); PYROLYSIS; WOOD; Gas chromatography; principal component analysis; thermolysis; Product distributions; Chemical compositions; Pyrolysis products; Residence time distribution; Thermochemical conversion; Pyrolysis-gas chromatography/mass spectrometry (py-GC/MS); Cellulose and hemicellulose; Low molecular mass; Volatile contents;
Subjects: G Geography. Anthropology. Recreation / földrajz, antropológia, kikapcsolódás > GE Environmental Sciences / környezettudomány
Q Science / természettudomány > QD Chemistry / kémia
SWORD Depositor: MTMT SWORD
Depositing User: MTMT SWORD
Date Deposited: 05 Jun 2019 12:36
Last Modified: 11 Mar 2020 00:15
URI: http://real.mtak.hu/id/eprint/93697

Actions (login required)

Edit Item Edit Item