Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Effect of Diluted H2SO4 and NaOH Treatment on Chemical Composition of Larch and Yellow Poplar

황산 및 수산화나트륨처리가 낙엽송과 백합나무의 주요 화학조성에 미치는 영향

  • Lee, Soo-Min (Division of Wood Chemistry & Microbiology, Department of Forest Products, Korea Forest Research Institute) ;
  • Lee, A-Ram (Division of Wood Chemistry & Microbiology, Department of Forest Products, Korea Forest Research Institute) ;
  • Ahn, Byoung Jun (Division of Wood Chemistry & Microbiology, Department of Forest Products, Korea Forest Research Institute) ;
  • Kim, Yong Sik (Division of Wood Chemistry & Microbiology, Department of Forest Products, Korea Forest Research Institute) ;
  • Yang, In (Department of Wood and Paper Science, College of Agriculture, Life & Environments Sciences, Chungbuk National University) ;
  • Cho, Sung Taig (Division of Wood Chemistry & Microbiology, Department of Forest Products, Korea Forest Research Institute)
  • 이수민 (국립산림과학원 임산공학부 화학미생물과) ;
  • 이아람 (국립산림과학원 임산공학부 화학미생물과) ;
  • 안병준 (국립산림과학원 임산공학부 화학미생물과) ;
  • 김용식 (국립산림과학원 임산공학부 화학미생물과) ;
  • 양인 (충북대학교 농업생명환경대학 목재종이과학과) ;
  • 조성택 (국립산림과학원 임산공학부 화학미생물과)
  • Received : 2013.05.20
  • Accepted : 2013.07.16
  • Published : 2013.07.25
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Abstract

In this study, both mild acid and alkali treatments with 1.0 wt% and 2.0 wt% of $H_2SO_4$ and NaOH solution were applied to evaluate the effects on chemical compositions of wood biomass. Yellow poplar (Liriodendron tulipifera L.) and larch (Larix kaempferi C.) were chosen due to major species planted in Korea. Chemical treatments of biomass were carried out by being soaked in either acid or alkali solution with 1:20 ratio for 72 hours at ambient temperature. Afterward, lignin, 5 major reduced sugars, ash contents and elemental composition were determined. To statistically understand the relationship between samples and chemical treatments, the Tukey test, simple linear regression model and ANOVA analysis were introduced using a statistical software R. As results from both wet chemistry and statistical analysis, yellow poplar was more affected on the lignin and xylose contents by acid treatments under these experimental conditions. Meanwhile, larch was more affected on the composition of galactose and lignin by alkali treatments. A series of results in this study would show that equivalent chemical treatment makes a change the chemical composition of each species.

본 연구에서는 산 및 알칼리 처리가 목질계 바이오매스의 주요 화학조성 변화에 미치는 영향을 확인하기 위해 $H_2SO_4$와 NaOH를 각각 1.0 wt%와 2.0 wt% 수용액으로 제조한 후 국내 주요 수종인 백합나무와 낙엽송에 상온에서 72시간 침지 처리하였다. 리그닌, 주요 구성당, 원소분석 등 화학적 특성 분석을 수행하고 그 결과를 통계프로그램을 이용하여 분석하였다. 그 결과 동일한 화학적 처리에도 수종에 따라 95% 유의수준에서 유의한 결과를 확인하였다. 백합나무는 산 처리에 민감한 변화를 보이는 반면에 낙엽송에서는 알칼리 처리에서 유의한 결과를 얻을 수 있었다. 두 수종 모두에서 glucose보다는 헤미셀룰로오스에 미치는 영향이 큰 것으로 분석되었으며, 바이오매스의 에너지량과 밀접한 관계가 있는 H/C와 O/C 비율을 이용한 Van Krevelen 다이어그램에서는 산 또는 알칼리 처리 종류에 관계없이 수종에 따라 상반된 결과를 확인하였다. 이러한 결과는 바이오매스 종류에 따라 각기 다른 최적화된 바이오에너지 생산 공정이 필요함을 의미하며, 목재펠릿과 같은 고형 바이오연료 생산의 경우 바이오매스 내 헤미셀룰로오스 및 리그닌 함량 변화로 인하여 내구성에 영향을 미칠 것으로 분석되었다.

Keywords

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