Documents in the NTIS Technical Reports collection are the results of federally funded research. They are directly submitted to or collected by NTIS from Federal agencies for permanent accessibility to industry, academia and the public.  Before purchasing from NTIS, you may want to check for free access from (1) the issuing organization's website; (2) the U.S. Government Printing Office's Federal Digital System website; (3) the federal government Internet portal; or (4) a web search conducted using a commercial search engine such as
Accession Number PB2013-100222
Title In Situ Transesterification of Microbial Oil to Produce Algal Biodiesel.
Publication Date Jun 2012
Media Count 25p
Personal Author B. B. He
Abstract This research was to process whole microalgae cells for biodiesel production without first extracting lipids. The ultimate goal is develop a novel process for algal biodiesel production directly from microalgae cells in a single step, i.e., in situ transesterification, to lower the processing costs. In this stage, we conducted research on (1) characterizing the selected microalgae strains and (2) screening the influential process parameters. Characterization was performed on microalgae through proximate and ultimate analyses, fatty acid profiles, ash content and mineral components of the microalgae samples, Thermogravimetric analysis and scanning electron microscopy examination on the samples. It was found that green microalgae are suitable for algal biodiesel production due to their relatively high lipid content, while brown microalgae may be good for fermentable sugar production due to their high carbohydrate content. Microalgae tested in this study have relatively high ash content (up to 25%wt), which is somewhat unexpected. Fatty acid profiles varied widely among the microalgae tested and need validation through further investigation. Reaction time affected the microalgal lipid conversion considerably at 300DGC, and extending the reaction would lead to satisfactory process efficiency. Findings from this study provide necessary information for the continued systematic investigation on algal biodiesel production.
Keywords Algae
Diesel fuels
Fuel processing

Source Agency Department of Transportation Research and Special Programs Administration
NTIS Subject Category 97K - Fuels
57B - Biochemistry
57K - Microbiology
Corporate Author Idaho Univ., Moscow. National Inst. for Advanced Transportation Technology.
Document Type Technical report
Title Note Final rept.
NTIS Issue Number 1301
Contract Number N/A

Science and Technology Highlights

See a sampling of the latest scientific, technical and engineering information from NTIS in the NTIS Technical Reports Newsletter

Acrobat Reader Mobile    Acrobat Reader