Publication detail

PAHs concentration in particulate matter from the combustion of torrefied agricultural crops

PRCHAL, M. ZLEVOROVÁ, T.

Original Title

PAHs concentration in particulate matter from the combustion of torrefied agricultural crops

Type

abstract

Language

English

Original Abstract

Torrefaction is a promising thermal pretreatment of biofuels which enhances mechanical and chemical properties. Torrefied product is among others characterized by lower moisture content, higher hydrophobicity, lower H/C and O/C ratios and additionally by heating values comparable to coal. Such pretreatment thus allows pellet production from agricultural crops, its co-combustion with coal and combustion in extant devices. As a result, poor-quality agricultural crops could be an inexpensive alternative to commonly used biofuels such as softwood or to fossil fuels. Increasing interest in torrefaction motivates multiple researchers, however, to this day it is impossible to find studies which sufficiently describe influence of torrefaction on combustion and emissions. Therefore, the aim of this work is to analyze gaseous emissions and mainly provide quantitative and qualitative analysis of polycyclic aromatic hydrocarbons concentration in particulate matter and exhaust gas. Three raw materials (sunflower, grain residues and softwood as reference material) were torrefied under temperature 300 °C and pyrolyzed at 550 °C. Subsequently, all materials were burnt in an automatic pellet boiler. During the combustion gaseous emission were measured by online analyzer and more importantly particulate matter samples were collected using quartz fiber filters. The extraction was carried out in an ultrasound bath with a mixture of solvents hexane and dichlormethane (50:50). For the quantification of PAHs standard of 16 EPA PAHs was used and the quantification was performed on a Bruker EVOQ TQ (GC/MS/MS). The results showed significant influence of thermal pretreatment on gaseous emission which was related to unstable combustion conditions. In terms of PAH concentrations in particulate matter, no significant impact of torrefaction was detected.

Keywords

torrefaction; agricultural residue; PAH; particulate matter

Authors

PRCHAL, M.; ZLEVOROVÁ, T.

Released

30. 11. 2023

Publisher

Vysoké učení technické v Brně, Fakulta chemická

Location

Brno

ISBN

978-80-214-6204-5

Book

Studentská odborná konference Chemie je život 2023 Sborník abstraktů

Edition number

první

Pages from

92

Pages to

92

Pages count

1

URL

https://www.fch.vut.cz/vav/konference/sok/vystupy/sbornik-abstraktu-2023-na-web-pdf-p251584

BibTex

@misc{BUT187271,
  author="Miroslav {Prchal} and Tereza {Zlevorová}",
  title="PAHs concentration in particulate matter from the combustion of torrefied agricultural crops",
  booktitle="Studentská odborná konference Chemie je život 2023 Sborník abstraktů",
  year="2023",
  edition="první",
  pages="92--92",
  publisher="Vysoké učení technické v Brně, Fakulta chemická",
  address="Brno",
  isbn="978-80-214-6204-5",
  url="https://www.fch.vut.cz/vav/konference/sok/vystupy/sbornik-abstraktu-2023-na-web-pdf-p251584",
  note="abstract"
}