Comparative evaluation of thermochemical liquefaction and pyrolysis for bio-oil production from microalgae

dc.contributor.author	Jena, U	en
dc.contributor.author	Das, KC	en
dc.date.accessioned	2014-06-06T06:50:52Z
dc.date.available	2014-06-06T06:50:52Z
dc.date.issued	2011	en
dc.identifier.issn	08870624	en
dc.identifier.uri	http://dx.doi.org/10.1021/ef201373m	en
dc.identifier.uri	http://62.217.125.90/xmlui/handle/123456789/5204
dc.subject.other	Aqueous phase	en
dc.subject.other	Bio oil	en
dc.subject.other	Bio-oil yield	en
dc.subject.other	Char yield	en
dc.subject.other	Comparative evaluations	en
dc.subject.other	Fuel properties	en
dc.subject.other	High moisture	en
dc.subject.other	High pressure	en
dc.subject.other	High temperature	en
dc.subject.other	Higher energy density	en
dc.subject.other	Liquid products	en
dc.subject.other	Low temperatures	en
dc.subject.other	Lower energies	en
dc.subject.other	Micro-algae	en
dc.subject.other	Parr reactors	en
dc.subject.other	Slow pyrolysis	en
dc.subject.other	Storage stability	en
dc.subject.other	Algae	en
dc.subject.other	Atmospheric pressure	en
dc.subject.other	Carbon steel	en
dc.subject.other	Energy utilization	en
dc.subject.other	Feedstocks	en
dc.subject.other	Fuel storage	en
dc.subject.other	Liquefaction	en
dc.subject.other	Moisture	en
dc.subject.other	Pyrolysis	en
dc.title	Comparative evaluation of thermochemical liquefaction and pyrolysis for bio-oil production from microalgae	en
heal.type	journalArticle	en
heal.identifier.primary	10.1021/ef201373m	en
heal.publicationDate	2011	en
heal.abstract	Bio-oil is the liquid product of thermochemical liquefaction or pyrolysis of biomass. Thermochemical liquefaction (TCL) is a low temperature (250-350 °C) and high pressure (5-20 MPa) process particularly suited for high moisture feedstocks, whereas pyrolysis is accomplished at moderate to high temperatures (400-600 °C) and atmospheric pressure and requires drying of the feedstock. In this paper, we present experimental results that provide a critical comparison of TCL and slow pyrolysis processes for producing bio-oil from algae. TCL experiments were performed in a 1.8-L Parr reactor using algae slurry (80% moisture) and pyrolysis runs were carried out in an 8-L mild steel cubical reactor, using dried algal powder as received (∼4% moisture). Yields and composition of bio-oil, char, gases, and aqueous phase were evaluated and compared for TCL and pyrolysis. TCL resulted in higher bio-oil yields (∼41%), lower char yields (∼6.3%), and lower energy consumption ratio compared to pyrolysis, which resulted in 23-29% bio-oil, and 28-40% solids yields. Bio-oil obtained from TCL was found to have higher energy density and superior fuel properties such as thermal and storage stabilities, compared to pyrolysis bio-oil. © 2011 American Chemical Society.	en
heal.journalName	Energy and Fuels	en
dc.identifier.issue	11	en
dc.identifier.volume	25	en
dc.identifier.doi	10.1021/ef201373m	en
dc.identifier.spage	5472	en
dc.identifier.epage	5482	en