Document Type : Original Article
Authors
1
Agricultural Engineering Department, Faculty of Agriculture, Cairo University, Egypt
2
Agricultural engineering department, faculty of agriculture, Cairo University
10.21608/agro.2025.364926.1636
Abstract
This research aims to estimate and calculate some thermal properties of terrified product from torrefaction process of rice straw cotton and stalk under different torrefaction temperatures (200,250,300) ℃, size (1.5, 3) cm and holding time (15,30,45) min. The highest calorific value for rice straw was 18.7 MJ / kg and for cotton stalk was 20.1 MJ/kg, at torrefaction temperature of 250 ℃, size 1.5 cm, and holding time 30 min. the highest value of mass yield and energy yield for rice straw were 70.1% and 72.84%, respectively, at torrefaction temperature 200 ℃ and size 1.5 cm and holding time 15 minutes. The lowest value of mass yield and energy yield for rice straw was 38% and 44.64%, respectively, at temperature 300 ℃, size 3 cm, and holding time 45 minutes. The highest value of mass yield and energy yield for cotton stalk was 74.5% and 76.44%, respectively, at torrefaction temperature 200 ℃, size1.5 cm, and a holding time of 15 minutes. The lowest value of mass yield and energy yield for cotton stalk were 40.25% and 45.5%, respectively, at torrefaction temperature 300 ℃, size of 3 cm, and holding time of 45 minutes. Also, the result indicated that the energy density for rice straw and cotton stalk was affected by the torrefaction temperature, size and holding time.
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