Energy Evaluation and Greenhouse Gas Emissions of Reed Plant Pelletizing and Utilization as Solid Biofuel

Energies

Kęstutis Venslauskas¹  Dionizas Streikus¹  Egidijus Šarauskis¹  Mečys Palšauskas¹  Algirdas Jasinskas¹ 

[1] Institute of Agricultural Engineering and Safety, Vytautas Magnus University, Agriculture Academy, Studentų 15 B, Akademija, LT-53362 Kaunas, Lithuania;

关键词: solid biofuel;    pellet and ash properties;    emissions;    energy evaluation;    greenhouse gas;   

DOI  :  10.3390/en13061516

来源: DOAJ

【 摘 要 】

This paper presents the results of research on the preparation and use for energy purposes of three reed herbaceous energy plants: reed (Phragmites australis) and bulrush (Typha); both grown in local vicinities on lakes and riverbanks and reed canary grass (Phalaris arundinacea L.). The physical-mechanical characteristics (density, moisture, and ash content) of chopped and milled reeds were investigated. The investigation of mill fractional compositions determined the largest amount of mill—reed mill, collected on the sieves of 0.63 mm (40.0%). The pellet moisture ranged from 10.79% to 6.32%, while the density was 1178.9 kg m⁻³ for dry matter (DM) of reed. The ash content of reed, bulrush and reed canary grass pellets was 3.17%, 5.88%, and 7.99%, respectively. The ash melting temperature ranged from 865 to 1411 °C; these temperatures were high enough for ash melting. The determined pellet calorific value varied from 17.4 to 17.9 MJ kg⁻¹ DM. The disintegration force, indicating pellet strength, ranged from 324.25 N for reed canary grass to 549.24 N for reed. The determined emissions of harmful pollutants—CO₂, CO, NO_x, and unburnt hydrocarbons (C_xH_y)—did not exceed the maximum permissible levels. The assessment of greenhouse gas emissions (GHG) from technology showed that the CO₂ equivalents ranged from 7.3 to 10.1 kg CO₂-eq. GJ⁻¹ for reed and reed canary grass, respectively.

【 授权许可】

Unknown