Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on the Improved the Hydrophobicity of Torrefied Biomass

반탄화 과정을 통한 바이오매스의 소수성 개선 연구

  • JEONG, JAE-SEONG (School of Mechanical Engineering, Pusan National University) ;
  • KIM, GYEONG-MIN (School of Mechanical Engineering, Pusan National University) ;
  • JEONG, HYUN-JUN (Boryeong Power Station Headquarters, Korea Middle Power Co.) ;
  • KIM, GYU-BO (Pusan Clean Coal Center, Pusan National University) ;
  • JEON, CHUNG-HWAN (School of Mechanical Engineering, Pusan National University)
  • 정재성 (부산대학교 기계공학부) ;
  • 김경민 (부산대학교 기계공학부) ;
  • 정현준 (한국중부발전 보령발전본부) ;
  • 김규보 (부산대학교 화력발전에너지분석기술센터) ;
  • 전충환 (부산대학교 기계공학부)
  • Received : 2018.12.17
  • Accepted : 2019.02.28
  • Published : 2019.02.28
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Abstract

Biomass, a carbon-neutral fuel, has great advantages because it can replace fossil fuels to reduce greenhouse gas emissions. However, due to its low density, high water content, and hydrophilicity, biomass has disadvantages for transportation and storage. To improve these properties, a pretreatment process of biomass is required. One of the various pre-treatment technologies, torrefacion, makes biomass similar to coal through low-temperature pyrolysis. In this study, torrefacion treatment was carried out at 200, 230, 250, 280, and $300^{\circ}C$ for wood pellet, empty fruit bunch (EFB) and kenaf, and the feasibility of replacing coal with fuel was examined. Hygroscopicity tests were conducted to analyze the hydrophobicity of biomass, and its chemical structure changes were investigated using Infrared spectrum analysis. It was confirmed that the hygroscopicity was decreased gradually as the torrefacion temperature increased according to the hygroscopicity tests. The hydrophilicity was reduced according to the pyrolysis of hemicellulose, cellulose, and lignin of biomass.

Keywords

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Fig. 1. Correlation between energy yield & mass yield of torre-fied biomass

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Fig. 4. -OH quantity of biomass from 3,400-3200 cm-1

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Fig. 5. C-O-(H) quantity of biomass from 1,040-1,110 cm-1

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Fig. 2. Moisture absorption ratio of raw and torrefied (a) wood pellet, (b) EFB, (c) Kenaf

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Fig. 3. FT-IR spectra of raw and torrefied (a) wood pellet, (b) EFB, (c) Kenaf

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Table 4. The main functional groups of the hemicellulose, cellulose, and lignin

Table 1. Proximate and calorific value analysis of the samples

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Table 2. Ultimate analysis of the samples

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Table 3. Equations for HHV

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