eprintid: 7976
rev_number: 2
eprint_status: archive
userid: 1
dir: disk0/00/00/79/76
datestamp: 2023-11-09 16:19:49
lastmod: 2023-11-09 16:19:49
status_changed: 2023-11-09 16:10:52
type: article
metadata_visibility: show
creators_name: Tiong, L.
creators_name: Komiyama, M.
creators_name: Uemura, Y.
creators_name: Nguyen, T.T.
title: Catalytic supercritical water gasification of microalgae: Comparison of Chlorella vulgaris and Scenedesmus quadricauda
ispublished: pub
keywords: Algae; Carbohydrates; Carboxylation; Catalysts; Gasification; Microorganisms; Nickel; Proteins; Reaction kinetics, Hydrolytic breakdown; Laboratory-scale reactor; Micro-algae; Nickel catalyst; Scenedesmus quadricauda; Supercritical water; Supercritical water gasification; Supercritical water gasification (SCWG), Carbon dioxide
note: cited By 49
abstract: Batch-wise supercritical water gasification (SCWG) of two types of microalgae was carried out in the absence and the presence of nickel catalysts in a laboratory scale reactor at 385 °C and 26 MPa. The microalgae used include Chlorella vulgaris (high protein and low carbohydrate contents) and Scenedesmus quadricauda (low protein and high carbohydrate contents). Time course trend of the total carbon-based gas yield of C. vulgaris and S. quadricauda was similar, showing asymptotic convex changes that may be attributed to the positive reaction order of SCWG of microalgae. In the presence of catalyst, the yield increased to 80-90 with time in an asymptotic way, whereas it reached only 12 in the absence of catalyst. For non-catalytic SCWG, the predominant gas product was carbon dioxide, which may be formed by decarboxylation of biomass. For catalytic SCWG, the major gas products were CH4, CO2, H2, and CO, of which composition can be explained by successive reactions of (1) hydrolytic breakdown of macromolecules to smaller organics, (2) gasification of organics to CO, CO2 and H2, (3) shift reaction of CO, and (4) methanation of CO and CO2, and their equilibrium. © 2015 Elsevier B.V. All rights reserved.
date: 2016
publisher: Elsevier
official_url: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84958999536&doi=10.1016%2fj.supflu.2015.10.009&partnerID=40&md5=e1e58dd67d3c6c1b2b07566eacdd28bf
id_number: 10.1016/j.supflu.2015.10.009
full_text_status: none
publication: Journal of Supercritical Fluids
volume: 107
pagerange: 408-413
refereed: TRUE
issn: 08968446
citation:   Tiong, L. and Komiyama, M. and Uemura, Y. and Nguyen, T.T.  (2016) Catalytic supercritical water gasification of microalgae: Comparison of Chlorella vulgaris and Scenedesmus quadricauda.  Journal of Supercritical Fluids, 107.  pp. 408-413.  ISSN 08968446