Earticle

초록

영어

Biodiesel has attracted great attention as an alternative renewable energy source for the replacement of petroleumbased diesel fuel, yet its high production cost due to expensive oil feedstock remainsas the major economical obstacle. In this study, we investigated catalysts and reaction conditions for the acid catalyzed pre-conversion of free fatty acid (FFA) to fatty acid methyl ester (FAME) in cheap low-grade oils of high acid value. The NaOH base catalyzed reaction of vegetable oil of the initial acid value of 2 mg KOH/g led to a high FAME conversion above 95.4%, but the conversion abruptly decreased at higher initial acid values. This base catalyzed reaction was practically ineffective displaying the FAME conversion below 15% even at the initial acid value of 10 mg KOH/g by the severe saponification side reaction. Among the various catalysts studied for the pre-conversion of FFA to FAME, Amberlyst-15 was the most effective in reducing the acid value, and the optimum reaction condition identified was 65℃ with oil to methanol ratio of 1：3 and catalyst concentration of 15% (w/w). As the results, great enhancements in the overall biodiesel conversion were achievable via a consecutive reaction of the acid catalyzed FFA pre-conversion to FAME under the optimal condition obtained with Amberlyst-15 followed by the NaOH base catalyzed reaction, far above the extent which was obtainable by the single NaOH catalyzed reaction.

목차

Abstract
 서론
 재료 및 방법
  실험 재료
  실험 방법
  분석 방법
 결과 및 고찰
  저급 원료유에 의한 바이오디젤의 합성반응
  유리지방산으로부터 FAME 전환을 위한 촉매선별
  Amberlyst-15 촉매반응의 최적화
  고농도 유리지방산의 지방산 메틸에스터 전환반응
 결론
 감사
 REFERENCES

키워드

저자

• 심연주 [ Yeon Ju Sim | 서울시립대학교 공과대학 화학공학과 ]
• 김의용 [ Eui Yong Kim | 서울시립대학교 공과대학 화학공학과 ] Corresponding author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  KSBB Journal

• 간기

  격월간

• pISSN

  1225-7117

• 수록기간

  2009~2013

• 십진분류

  KDC 476 DDC 576