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Production of Solid Fuel From Rice Straw Through Torrefaction Process

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2015

Key Words:

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
Torrefaction tests were carried out on rice straw samples in order to understand the changes in chemical composition at temperatures of 200–300°C and residence times of 30 and 60 minutes. The raw material chemical composition has moisture content of 14.75%, carbon (C) 48.70%, hydrogen (H) 6.59%, nitrogen (N) 1.39%, sulphur (S) 0.36%, volatiles (V) 17.13%, and calorific value (CV) 19639.3 KJ/kg. The raw biomass also has a bulk density of 73 kg/m3. Torrefaction at temperatures of 250°C and residence time of 30 minutes resulted in a significant decrease in moisture by about 83.94%, but the other components, C, H, N, O, S, and V changed only marginally. Increasing the torrefaction temperature to 300°C and residence time to 60 minutes further reduced the moisture to a final value of 0.00% (a 100% reduction compared to original) and also resulted in a decrease in the other components, H, S, and O by 23.07%, 75.00%, and 22.32%, respectively. The carbon content at 300°C and 60 minutes increased by about 12.55% while N content increased by 91.37%. The calorific values increased by about 6.25% at 250°C and 30 minutes, whereas at 300°C and 60 minutes, the increase was higher (about 11.11%) and resulted in a maximum degree of carbonization of 1.111. The H/C ratio decreased with increase in torrefaction temperature, where a minimum value of 0.093 was observed at 300°C and 60 minute while bulk density decreased with increase in temperature with the lowest value of 66 kg/m3which represents 9.59% decrease at 300°C and 60 minutes residence time.
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REFERENCES

References: 

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International Journal of Science and Engineering Investigations, Volume 4, Issue 37, February 2014 6
www.IJSEI.com Paper ISSN: 2251-8843 ID: 43715-01
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