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Indexed by:期刊论文

Date of Publication:2019-01-10

Journal:JOURNAL OF CLEANER PRODUCTION

Included Journals:SCIE、Scopus

Volume:207

Page Number:618-629

ISSN No.:0959-6526

Key Words:Chlorella vulgaris; Spirulina; Air gasification; Thermogravimetric kinetic; Mass spectrometry

Abstract:This study investigates the non-isothermal (10, 15, 20 and 30 degrees C min(-1)) gasification of chlorella vulgaris and spirulina under air stream via thermogravimetric analysis coupled with mass spectrometry (30 -800 degrees C) to explore the application as feedstock for syngas production. The results showed four major peak conversion zones of organic matters in both chlorella vulgaris (60-100 degrees C, 280-305 degrees C, 390-420 degrees C, and 440-450 degrees C) and spirulina (280-305 degrees C, 380-410 degrees C, 430-450 degrees C, and 720-760 degrees C) during the gasification process. Thermogravimetric data via iso-conversional method was interpreted to achieve the kinetic parameters of the devolatilization reaction of algal biomass gasification. The kinetic investigation showed that the activation energy values (E-a) varied over the conversion values (alpha = 0.05-0.8). The comparison of kinetic results obtained by the model and those reported in other studies for micro-algal biomasses was in agreement. Quantification of evolved gases was accomplished via a semi-quantitative method. The main evolved gases were H-2, CO and CO2, implying that water gas reaction, water gas shift reaction and oxidation reactions were predominant. H-2 generation rate was supported with increase in lower heating rate (owing to its longest gasification time compared to higher heating rates). The obtained data are expected to facilitate the design and optimization of the gasification of low-lipid microalgae. (C) 2018 Elsevier Ltd. All rights reserved.