Torrefied biomass fuels as a renewable alternative to coal in co-firing for power generation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F20%3APU138530" target="_blank" >RIV/00216305:26210/20:PU138530 - isvavai.cz</a>

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S0360544220315528?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0360544220315528?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.energy.2020.118444" target="_blank" >10.1016/j.energy.2020.118444</a>

Result language

angličtina

Original language name

Torrefied biomass fuels as a renewable alternative to coal in co-firing for power generation

Original language description

This study aims to assess the torrefaction of biomass as alternative renewable energy fuel to coal during co-firing. It was evaluated that torrefaction improves biomass grindability to such an extent that it can be used in coal mills with coal in co-firing without capital intensive modification. Torrefaction of beech wood was performed on a batch scale reactor at three different temperatures (200, 250 and 300 degrees C) with 30 min of residence time. The chemical structural changes in torrefled biomass were investigated with binding energies and FTIR (Fourier transform infrared) analysis. Monocombustion and co-combustion tests were performed to examine the combustion behaviour regarding flue gas emissions (CO, NOx and SO2) at 0.5, 1.5 and 2.5 m distance from the burner opening along with fly ash analysis. The FTIR and binding energies showed that lignin hardly affected during light torrefaction while hemicellulosic material was significantly depleted. The Hardgrove grindability index (HGI) was calculated with three methods (DIN51742, IFK and ISO). The medium temperature torrefled biomass (MTTB) yields HGI value in the range of 32-37 that was comparable with HGI of El Cerrejon coal (36-41). A slight change in temperature enabled the torrefled beech wood to be co-milled with coal without capital intensive modification and improved grindability. Comparing the combustion behaviour of single fuels, low temperature torrefled biomass (LTTB) produces less amount of NOx (426 mg/m(3)), CO (0.002 mg/m(3)) and SO2 (2 mg/m(3)) as compared MTTB and raw beech wood. In the case of co-combustion, it was found that blending of coal with raw biomass does not show a stable behaviour. However, premixing of 50% of coal with 50% of torrefled biomasses (MTTB and LTTB) gives most stable behaviour and reduces NOx almost 30% and SOx up to almost 50% compared to coal. The fly ash contents analysis proved that K2O contents much decreased during co-firing of coal and torrefled fuels that could c

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

20704 - Energy and fuels

Project

<a href="/en/project/EF15_003%2F0000456" target="_blank" >EF15_003/0000456: Sustainable Process Integration Laboratory (SPIL)</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2020

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Energy

ISSN

0360-5442

e-ISSN

1873-6785

Volume of the periodical

neuveden

Issue of the periodical within the volume

209

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

118444-118444

UT code for WoS article

000571208100012

EID of the result in the Scopus database

2-s2.0-85089220866