Effect of heating rate on biomass liquefaction: Differences between subcritical water and supercritical ethanol

Title
Effect of heating rate on biomass liquefaction: Differences between subcritical water and supercritical ethanol
Authors
스테펜 브랜드하르디김재훈서동진
Keywords
Liquefaction; Subcritical water; Supercritical ethanol; Heating rate; Liquefaction mechanism
Issue Date
2014-04
Publisher
Energy
Citation
VOL 68, 420-427
Abstract
This study investigates the influence of heating and cooling rate on liquefaction of lignocellulosic biomass in subH2O (subcritical water) or in scEtOH (supercritical ethanol), in dependency of final reaction temperatures (250e350 C) and residence times (1e40 min). The heating rate has been identified as a crucial parameter in the subH2O-based liquefaction, whereas it has marginal influence in the scEtOH-based liquefaction. Detailed characterization of gas, liquid and solid products enables to identify the individual reaction steps, which results in a new insight into the reaction mechanisms, depending on the liquefaction solvents and conditions. Similar to fast pyrolysis, hydrothermal liquefaction consists of beneficial primary reactions (pyrolytic & hydrolytic degradation) and non-beneficial secondary reactions i.e. recombination and secondary cracking. In scEtOH, biomass was decomposed by pyrolysis and alcoholysis at relatively high reaction temperatures while the recombination of reaction intermediates are retarded by the unique reactions of scEtOH such as hydrogen donation and hydroxylalkylation.
URI
http://pubs.kist.re.kr/handle/201004/47949
ISSN
03605442
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE