Publication detail

Analysis of Organic Compounds in Biochar Produced by Pyrolysis of Sludge

MRAVCOVÁ, L. BITTENCOURT-MORÉ F. RAČEK, J. ŠEVČÍK, J. VÁVROVÁ, M. MEINDL, J. ČÁSLAVSKÝ, J.

Original Title

Type

lecture

Language

English

Original Abstract

The largest part of energy production is realized by the burning of fossil fuels, the resources are depletable and their using causes the environmental pollution. Because of this, renewable sources of energy are constantly being sought, for example generation of gas from biomas and waste product (eg. sludge from sewage treatment plants) by pyrolysis and combustion processes. Pyrolysis is a thermochemical process (decomposition) without the presence of oxygen. The products can be divided into gas, liquid (pyrolysis oil) and solid residue (biochar). The gas mainly contains CO, H2, CO2, nitrogen oxides, CH4 and other low molecular weight hydrocarbons. The oil is composed from hydrocarbons with a high number of carbon and other organic compounds. The carbonaceous residue is composed from unreacted particles of decomposed material, mainly charred matter and ash. Biochar could be applied to soil for the carbon enrichment and better physical qualities. Pyrolysis of organic material is known to produce a wide variety of low and high molecular weight aromatic coumpounds (PAHs) and their derivatives depending on the biomass type, pyrolysis conditions and kinetic factors. In this work, the microwave pyrolysis under low temperature conditions was used for the processing of sludge from the waste water treatment plant. Especially, we analysed the biochar, as one pyrolysis product, for PAHs content. The pressurized solvent extraction (PSE) was used for extraction of PAHs into dichlormethane. The extract was cleaned by silicagel column and the fraction contain PAHs was analyzed using gas chromatography with time of flight mass spectrometry detection (GC-TOF MS).

Keywords

Biochar, GC-TOF-MS, PAHs

Authors

MRAVCOVÁ, L.; BITTENCOURT-MORÉ F.; RAČEK, J.; ŠEVČÍK, J.; VÁVROVÁ, M.; MEINDL, J.; ČÁSLAVSKÝ, J.

Released

12. 9. 2018

Pages from

Pages to

Pages count

159

BibTex

@misc{BUT153408,
  author="MRAVCOVÁ, L. and BITTENCOURT-MORÉ F. and RAČEK, J. and ŠEVČÍK, J. and VÁVROVÁ, M. and MEINDL, J. and ČÁSLAVSKÝ, J.",
  title="Analysis of Organic Compounds in Biochar Produced by Pyrolysis of Sludge",
  year="2018",
  pages="44--44",
  note="lecture"
}