Study of the Appropriate Conditions for the Production of Pellets as a Solid Biofuel from Agricultural Residues
Mohamed Mohamed Abd ElHameed Abd ElWahaab;
Abstract
This work targets the investigation and studying of the appropriate conditions for the production of pellets as a solid biofuel from agricultural residues. Agricultural residues in Egypt have been studied and characterized in order to select the most promising and suitable raw materials for the purpose of bio-pellets production.
Agricultural residues have been characterized based on amounts, availability, geographic distribution, collection prices, current utilization methods and physio-chemical properties of the residues. Trading off between these parameters is based on a screening matrix; in which every factor affecting the production of pellets was weighted on a 0 to 100 scale and the highest score raw material was selected to produce pellet samples for factory tests and experimentations. Based on the screening matrix results, rice straw, cotton stalks, and sorghum stalks have been chosen for study.
Agro-pellet samples were produced from rice straw, cotton and sorghum stalks with different water and molasses concentrations. The associated quality parameters of the produced pellet samples in terms of calorific value, single pellet density, bulk density of pellets and mechanical durability index were measured and compared to the requirement of international standards for agro-pellets. International agro-pellet standards’ lower limits are 12 MJ/kg for calorific value, 1.2 g/cm3 for single pellet density, 600 kg/m3 for bulk density and 96.6% mechanical durability index. A maximum water content of 10% and natural additives at a maximum of 2% is permitted. The results show that the produced agro-pellets well satisfythese international standards requirements.
Producing rice straw pellets with 1.1% water content (w.b.) will result in high quality pellets satisfying the requirements of international standards in terms of calorific value, single pellet density, bulk density of pellets and mechanical durability,their values were found to be 15.45 MJ/kg, 1.435 g/cm3, 717.5 kg/m3 and 99.904%, respectively.
Agricultural residues have been characterized based on amounts, availability, geographic distribution, collection prices, current utilization methods and physio-chemical properties of the residues. Trading off between these parameters is based on a screening matrix; in which every factor affecting the production of pellets was weighted on a 0 to 100 scale and the highest score raw material was selected to produce pellet samples for factory tests and experimentations. Based on the screening matrix results, rice straw, cotton stalks, and sorghum stalks have been chosen for study.
Agro-pellet samples were produced from rice straw, cotton and sorghum stalks with different water and molasses concentrations. The associated quality parameters of the produced pellet samples in terms of calorific value, single pellet density, bulk density of pellets and mechanical durability index were measured and compared to the requirement of international standards for agro-pellets. International agro-pellet standards’ lower limits are 12 MJ/kg for calorific value, 1.2 g/cm3 for single pellet density, 600 kg/m3 for bulk density and 96.6% mechanical durability index. A maximum water content of 10% and natural additives at a maximum of 2% is permitted. The results show that the produced agro-pellets well satisfythese international standards requirements.
Producing rice straw pellets with 1.1% water content (w.b.) will result in high quality pellets satisfying the requirements of international standards in terms of calorific value, single pellet density, bulk density of pellets and mechanical durability,their values were found to be 15.45 MJ/kg, 1.435 g/cm3, 717.5 kg/m3 and 99.904%, respectively.
Other data
| Title | Study of the Appropriate Conditions for the Production of Pellets as a Solid Biofuel from Agricultural Residues | Other Titles | دراسة الظروف المناسبة لتصنيع المصبعات كوقود حيوى من البواقى الزراعية | Authors | Mohamed Mohamed Abd ElHameed Abd ElWahaab | Issue Date | 2014 |
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