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  • Title: Microwave-enhanced pyrolysis of macroalgae and microalgae for syngas production.
    Author: Hong Y, Chen W, Luo X, Pang C, Lester E, Wu T.
    Journal: Bioresour Technol; 2017 Aug; 237():47-56. PubMed ID: 28283330.
    Abstract:
    In this study, three different marine biomasses, i.e., microalgae-spirulina, chlorella and macroalgae-porphyra, were pyrolyzed in a laboratory-scale multimode-microwave cavity at 400, 550 and 700°C. Ovalbumin and cellulose were also chosen as model compounds to simulate algae. The influence of heating rate on pyrolysis and the βi curves of different samples under different temperatures were studied in detail. The porphyra was found to be the most reactive and produced the largest gaseous fraction (87.1wt%) amongst the three algae, which comprised of 73.3vol% of syngas. It was found that nitrogenated compounds in bio-oil were derived from protein in algae while carbohydrate led to the formation of PAHs. For the production of bio-oil, protein-rich microalgae is favorable compared with porphyra due to their lower amount of PAHs, while porphyra is more suitable for the production of H2+CO rich gas product, which is comparable with that of conventional gasification processes.
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