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왕겨 및 왕겨재의 화학적 조성 성분과 열적 특성
Chemical Compositions and Thermal Characteristics of Rice Husk and Rice Husk Ash in Korea

박승제   (Bioindustrial Machinery Engineering Major, Chonbuk National UniversityUU0001120  ); 김명호   (Bioindustrial Machinery Engineering Major, Chonbuk National UniversityUU0001120  ); 신현명   (School of Mechanical and Automotive Engineering, Keimyung UniversityUU0000145  );
  • 초록

    For better and large utilization of rice husk, the production and consumption status, differences in chemical composition and heating value due to region and variety, and thermogravimetric characteristic of rice husk were studied. In addition, the differences in chemical composition due to region and variety and the crystallization characteristic of rice husk ash were also studied. Approximately 800,000 M/T of rice husk was produced per year in Korea, which is about $18\%$ of the paddy production by weight. Noticeable varietal and regional difference pattern in chemical composition was not found among the domestic rice husk samples. Their average ash content and higher heating value were $16.4\%$ and 16,660 kJ/kg by dry basis, respectively. A relation seemed to exist between the carbon content and higher heating value. Noticeable difference pattern in chemical composition was not found among the domestic rice husk ash samples. The $SiO_2$ contents were a little low, the maximum being $92.9\%,$ and the contents of major components such as CaO, MgO, and $K_2O$ were also lower compared with foreign rice husk ash due to the deficiency of compost matters in domestic soils. Thermogravimetry study showed the thermal decomposition of rice husk started at about $250^{\circ}C,$ followed by relatively fast combustion of combustible gas until the temperature rose to $350^{\circ}C.$ After $350^{\circ}C,$ combustion of the carbon component proceeded relatively slowly as the temperature increased. Therefore, the ignition temperature of the rice husk could be estimated around $300^{\circ}C$ . Crystallization of $SiO_2$ in the rice husk ash was found from the combustion temperature of $750^{\circ}C$ and became distinctly when the combustion temperature exceeded $900^{\circ}C$ . The ash became darker with $SiO_2$ crystallization.


  • 주제어

    Chemical composition .   Heating value .   Rice husk .   Rice husk ash .   Thermogravimetry .   X-ray diffraction.  

  • 참고문헌 (6)

    1. Kim, M. H., C. S. Kim and S. J. Park. 1997. Performance of a pilot-scale rice husk incinerator. J. of Korean Soc. Agric. Mach. 22(1):21-29 
    2. Shimizu, H. and T. Kimura. 1985. Direct combustion properties of rice hull. J. of Japanese Soc. Agric. Mach. 46(1):633-638 (In Japanese) 
    3. Beagle, E. C. 1978. Rice husk convention to energy. FAO Agricultural service bulletin 
    4. 김지동 외. 1981. 왕겨로부터 가연성 가스 제조에 관한 실험연구. 에너지 4(2):74-89 
    5. Shimizu, H., A. Kanno and Y. Nishiyama. 1978. Physical properties of rice hull as the fuel. J. of Japanese Soc. Agric. Mach. 39(4):477-481 (In Japanese) 
    6. 조명제, 박영재, 최경빈, 강점룡. 1981. 왕겨 연소 보일러 개발에 관한 연구. 에너지 4(2):65-73 
  • 이 논문을 인용한 문헌 (8)

    1. Sung, Yong-Joo ; Shin, Soo-Jeong ; Oh, Min-Taek 2009. "Chemical Composition of Rice Hull and Morphological Properties of Rice Hull Fibers" 펄프 종이기술 = Journal of Korea Technical Association of the Pulp and Paper Industry, 41(3): 22~28     
    2. Nam, Dong-Yoon ; Lee, Si-Rim ; Park, Chul-Hong ; Park, Kyu-Sik ; Nam, Sang-Heon ; Heo, Jin-Chul ; Lee, Sang-Han 2010. "Comparison of Anti-Oxidant Activities of Chaff Vinegar Liquor" 한국식품저장유통학회지 = Korean journal of food preservation, 17(3): 430~434     
    3. Lee, Young-Ju ; Jung, Woong-Ki ; Sung, Yong-Joo 2011. "Evaluation of fiberization of rice hull by autohydrolysis conditons" 농업과학연구 = CNU Journal of agricultural science, 38(1): 95~100     
    4. Yoon, Nara ; Lee, Sang Hoon ; Jang, Gwi Yeong ; Lee, Yoon Jeong ; Li, Meishan ; Kim, Min Young ; Lee, Junsoo ; Jeong, Heon Sang 2015. "Optimum Extraction of Tricin and Tricin 4'-O-(threo-β-guaiacylglyceryl) Ether (TTGE) from Rice Hull (Oryza sativa L.)" 한국식품영양과학회지 = Journal of the Korean Society of Food Science and Nutrition, 44(12): 1923~1926     
    5. Yoon, Nara ; Jang, Gwi Yeong ; Lee, Yoon Jeong ; Li, Meishan ; Kim, Min Young ; Kim, Hyun Young ; Lee, Junsoo ; Jeong, Heon Sang 2016. "Tricin and Tricin 4'-O-(Threo-β-Guaiacylglyceryl) Ether Contents of Rice Hull (Oryza sativa L.) with Heat Treatment and Germination" 한국식품영양과학회지 = Journal of the Korean Society of Food Science and Nutrition, 45(5): 696~701     
    6. Kim, Dong-Seop ; Sung, Yong Joo 2016. "Effects of Chlorine Dioxide Pretreatment on the Silica Extraction of Rice Husk" 펄프 종이기술 = Journal of Korea Technical Association of the Pulp and Paper Industry, 48(6): 211~217   
    7. Kim, Hyung Min ; Sung, Yong Joo ; Park, Young Seok ; Shin, Jea Chul 2016. "Manufacturing and Characterization of Pulp Mold with Rice Husk Fiber" 펄프 종이기술 = Journal of Korea Technical Association of the Pulp and Paper Industry, 48(3): 66~72     
    8. Yoon, Nara ; Jang, Gwi Yeong ; Lee, Yoon Jeong ; Li, Meishan ; Kim, Min Young ; Kim, Hyun Young ; Lee, Junsoo ; Jeong, Heon Sang 2016. "Isolation and identification of a tricin 4"-O-(threo-β-guaiacylglyceryl) ether producing microorganism from germinated rice" 한국식품과학회지 = Korean journal of food science and technology, 48(4): 361~365     

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