| Thermolysis of microalgae and duckweed in a CO(2)-swept fixed-bed reactor: Bio-oil yield and compositional effects. | |
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MedLine Citation:
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PMID: 22285294 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Microalgae and duckweed were grown and harvested over a three-month period in CO(2)-sparged helioreactors and open earthen ponds, respectively. The biomass feedstocks were thermolyzed in a thermogravimetric analyzer (TGA) and fixed-bed reactor to produce a fuel precursor coined "bioleum". Analysis of the thermolysis kinetics revealed an increase in the activation energy with heating rate for both aquatic species. Activation energies were lower than literature-reported values for lignocellulosics, corroborated by TGA thermolysis of pinewood. Thermolysis of microalgae resulted in higher bioleum and energy yields than for duckweed, reflecting differences in the biomass composition. The algal bioleum properties resemble those of crude petroleum except for higher nitrogen and oxygen content and acid number. Speciation identified 300+ compounds in the oil phase, with similar amounts of hydrocarbons and oxygenates, while acetic acid was the major species in the aqueous phase. The compounds were classified according to their degree of aromaticity, oxygenation, and nitrogenation. |
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Authors:
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Alejandrina Campanella; Rachel Muncrief; Michael P Harold; David C Griffith; Norman M Whitton; Robert S Weber |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-5 |
Journal Detail:
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Title: Bioresource technology Volume: - ISSN: 1873-2976 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-30 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9889523 Medline TA: Bioresour Technol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2011 Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Chemical & Biomolecular Engineering, University of Houston, Houston, TX 77204-4004, United States. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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