Upgrading bio-heavy oil via esterification of fatty acids and glycerol
- Authors
- Kim, Jung-Hun; Jung, Jong-Min; Cho, Seong-Heon; Tsang, Yiu Fai; Wang, Chi-Hwa; Lee, Jechan; Kwon, Eilhann E.
- Issue Date
- Apr-2019
- Publisher
- ELSEVIER SCI LTD
- Keywords
- Bio-heavy oil; Biorefinery; Waste-to-energy; Renewable portfolio standard
- Citation
- JOURNAL OF CLEANER PRODUCTION, v.217, pp.633 - 638
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF CLEANER PRODUCTION
- Volume
- 217
- Start Page
- 633
- End Page
- 638
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/189512
- DOI
- 10.1016/j.jclepro.2019.01.289
- ISSN
- 0959-6526
- Abstract
- Bio-heavy oil (BHO), a crude mixture of fatty acids (FAs) and mono-, di-, and triglycerides unavoidably generated as waste during biodiesel production processes, is an alternative replacement of petro-heavy oil as a fuel for power generation. It is reported for the first time that upgrading the quality of raw BHO (lowering the acid value (AV) of BHO) can be achieved via a low-pressure non-catalytic esterification process. Esterification of the FAs contained in raw BHO on solid acid catalysts (tungsten trioxide and niobium pentoxide) were investigated by comparison with the non-catalytic method. The AV of raw BHO can be successfully reduced from 116 to similar to 38 in 2 h under a low pressure (0.1 bar) via the non-catalytic esterification process. Catalytic esterification with Nb2O5 or WO3 showed similar performance to the non-catalytic esterification. It can be suggested a possibility to make a high-quality renewable fuel (e.g., BHO with a low acid value) for power generation from inexpensive feedstock.
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