INVESTIGATION OF AGRICULTURE BIOMASS FOR PYROLYSIS AND GASIFICATION

A. Mlonka-Medrala1, M. Sieradzka1*, P. Evangelopoulos2, W. Yang2, A. Magdziarz1

1AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Krakow, Poland 2KTH Royal Institute of Technology, 100 44 Stockholm Brinellvägen 23, Sweden

*email: msieradz@agh.edu.pl

The agriculture biomass has a wide energy potential. The most

frequently applied thermochemical technologies for biomass

converting into energy or chemicals are combustion, pyrolysis,

gasification and high-pressure liquefaction.

Nineth European Combustion Meeting, Lisboa, Partugal, 14-17 April 2019

Pyrolysis process in biomass particles.

The general scheme of decomposition of large hydrocarbon molecules into smaller ones during the pyrolysis.

Scheme of gasification process.

Proximate and ultimate analysis of oat straw.

Thermal behaviour of oat straw under oxidizing atmosphere/combustion (TG, DTG, and DSC curves).

Thermal behaviour of oat straw under pyrolysis conditions (TG, DTG, and DSC curves).

CnHmOp (biomass) liquidCxHyOz + gasCxHyOz + C(char)

Gas analysis of oat straw gasification process.

Gas analysis of oat straw pyrolysis process.

Experimental facility – scheme: 1 – nitrogen/air supply, 2 – gas regulator, 3 – flow meter, 4 – three way valve, 5 – reactor, 6 – sample 7 – electrical heater, 8 – insulation, 9 – tar collecting vessels, 10 – cooling system, 11 – gas collecting vessels, 12 – exhaust gases output, 13 – heater controller, 14 – analog-to-digital converter, 15 – data recording, T1, T2 – K-type thermocouples.

Pyrolysis is thermochemical process which relies to decomposition of biomass in absence of additional

agents like oxygen or with very limited supply. The temperature range of biomass pyrolysis is 300 –

650 °C. A general reaction for pyrolysis process can be presented according to the following scheme:

The main purpose of gasification process is conversion of feedstock (solid or liquid) into gaseous fuel

as well as into chemical feedstock which can be a source of energy during combustion. Gaseous

products contain energy packed into chemical bonds. The presence of gasifying medium, like air,

oxygen or steam, is required to carry out the process. Agent allows to convert heavier hydrocarbons

into low-molecular-weight gases (for example CO and H2).

Pyrolysis is thermochemical process which relies to decomposition

of biomass in absence of additional agents like oxygen or with

very limited supply. The temperature range of biomass pyrolysis is

300 – 650 °C.

C, % N, % H, % S, %

46.39 0.56 5.83 0.11

Cl, % M, % A, % HHV, kJ/kg

0.15 4.83 7.6 18170

https://biomass-ccu.com/ Bioenergy – Carbon capture and utilisation – Energy Storage

Acknowledgements

Part of this project has received funding from

the European Union’s Horizon 2020 research

and innovation programme under the Marie Skłodowska-Curie grant agreement

No 823745.

Agata Mlonka-Medrala would like to kindly thanks to BRISK Biofuels Research

Infrastructure for Sharing Knowledge.