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

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1516 ◽  
Author(s):  
Algirdas Jasinskas ◽  
Dionizas Streikus ◽  
Egidijus Šarauskis ◽  
Mečys Palšauskas ◽  
Kęstutis Venslauskas

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, NOx, and unburnt hydrocarbons (CxHy)—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.

2014 ◽  
Vol 383 (1-2) ◽  
pp. 217-230 ◽  
Author(s):  
Sandhya Karki ◽  
Lars Elsgaard ◽  
Joachim Audet ◽  
Poul Erik Lærke

GCB Bioenergy ◽  
2011 ◽  
Vol 4 (4) ◽  
pp. 462-474 ◽  
Author(s):  
Ülo Mander ◽  
Järvi Järveoja ◽  
Martin Maddison ◽  
Kaido Soosaar ◽  
Rene Aavola ◽  
...  

2017 ◽  
Vol 63 (No. 1) ◽  
pp. 16-22
Author(s):  
Malaťák Jan ◽  
Bradna Jiří

Utilization of waste suitable as a fuel for small combustion devices is a very important issue. Therefore, this article analyzes selected waste materials from agriculture and maintenance of municipal vegetation. The pellet samples from composting had very high ash content (22.39 and 36.85% wt.), which resulted in low values of net calorific value (12.66 and 10.24 MJ/kg), <br /> but also in bad properties of these samples in high concentration of harmful emission. Other problematic fuel samples were pellets from maintenance of city vegetation and reed canary grass, for which high concentration of carbon monoxide was measured during combustion process. The device used for these experiments is based on burner furnace. Combustion conditions could be improved by more uniform fuel supply to the burner and better control of combustion air. Boiler with advanced combustion control can reach better results during combustion process. Results in this article are valid for tested materials combusted in simple pellet burner with limited ability to control combustion process.


Author(s):  
Maka Jishkariani ◽  

At the present stage, economic research on climate change and its main problem requires in-depth scientific study and analysis of various factors. An important source of air pollution is the energy sector, especially solid and liquid fuels used for technological purposes in thermal power plants. In Georgia, 1/5 of the total electricity generated is produced in thermal power plants. The article analyses Greenhouse gas emissions in Georgia by sectors and sub-sectors as well the criteria for estimating fuel combustion, such as net calorific value of fuel and carbon content standard indicators. The formula for calculation of CO2, CH4 and N2O emissions from the transport vehicles is developed in this work.


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