Abstract：
:In order to prepare a genuine biodiesel, it is essential to use methanol prepared from biomass but not natural gas for biodiesel production. Thus, we have proposed to use crude bio-methanol produced by wood gasification for biodiesel production. Since such a bio-methanol contains some impurities, an effect of its impurities was studied on the biodiesel production by supercritical method. In general, impurities in crude bio-methanol are reported to include methyl formate, ethanol, 1-butanol, diisopropyl ether, water, etc. Triglycerides and oleic acids were, thus, treated with these impurities under supercritical conditions. As a result, it was found that methyl formate, ethanol and 1-butanol could convert them to fatty acid alkyl esters (BDF), whereas no conversion was achieved with diisopropyl ether. Thus, crude bio-methanol can be used for BDF production as a substitute for methanol from fossil resources. However, due to more efficient reaction, crude bio-methanol can be more applicable to the two-step supercritical methanol process, consisting of hydrolysis of triglycerides and subsequent esterification of fatty acids, compared with the one-step supercritical methanol process, where transesterification of triglycerides is a major reaction.
journal_name
Bioresour Technoljournal_title
Bioresource technologyauthors
Isayama Y,Saka Sdoi
10.1016/j.biortech.2007.09.056subject
Has Abstractpub_date
2008-07-01 00:00:00pages
4775-9issue
11eissn
0960-8524issn
1873-2976pii
S0960-8524(07)00801-2journal_volume
99pub_type
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