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http://dx.doi.org/10.12925/jkocs.2020.37.6.1678

A Study on the possibility of using wood pellets of rice husk through the addition combusion improver and development of expansion technology  

Kim, Wanbae (Department of Environment Energy Engineering, Graduate School of Energy & Environment, Seoul National University of Science & Technology)
Oh, Doh Gun (Unibio Corporation)
Ryu, Jae Sang (Korea Testing & Research institute)
Jung, Yeon-Hoon (Gyeonggi Institute of Health & Environment)
Pak, Daewon (Department of Environment Energy Engineering, Graduate School of Energy & Environment, Seoul National University of Science & Technology)
Publication Information
Journal of the Korean Applied Science and Technology / v.37, no.6, 2020 , pp. 1678-1686 More about this Journal
Abstract
This study attempted to derive the possibility of using wood pellet using rice husk, which is an agricultural byproduct, and tried to improve the lower calorific value of rice hulls thorough expansion technology and combustion additives. In the physical and chemical analysis of rice husk, the result was obtained that the chlorine content was 0.09%, which did not meet the wood pellet quality standard of Korea. When making rice hulls into expanded rice husk through the expansion technology, the chlorine content decreased, resulting in a product of 0.02%, which is equivalent to the wood pellet standard of Korea, and the calorific value was also increased to 4,280 kcal/kg compared to the existing 3,780 kcal/kg. To obtain a product of 5,000 kcal/kg or more, borax, hydrogen peroxide, and sodium hydroxide was used as combustion improver. However the improvement in calorific value was insufficient. After conversion to coffee oil path using coffee grounds, which is a waste resource biomass, it is mixed into an expanded rice husk, and when the product is analyzed, the coffee oil 15 wt% mixed product shows an excess of 4,949 kcal/kg. When using rice husk, an agricultural byproduct, as wood pellets, it is considered desirable to use waste resources to improve the calorific value, and according to the results of this study, when mixing coffee oil, rice husk can be sufficiently used as wooden pellets.
Keywords
Combusion improver; Coffee grounds; Rice hulls; Swelling technology; Wood pellet;
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Times Cited By KSCI : 6  (Citation Analysis)
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