Technical and economic assessment of the pyrolysis and gasification integrated process for biomass conversion
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Author list: Im-orb K., Wiyaratn W., Arpornwichanop A.
Publisher: Elsevier
Publication year: 2018
Journal: Energy (0360-5442)
Volume number: 153
Start page: 592
End page: 603
Number of pages: 12
ISSN: 0360-5442
Languages: English-Great Britain (EN-GB)
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Abstract
The technical and economic prospects for synthesis gas production via an integrated biomass pyrolysis and gasification (IBPG) process are evaluated for the case where rice straw is a considered feedstock. Modeling of the integrated process is performed by using the Aspen Custom Modeler program. The simulation results show that the production rates of synthesis gas and bio-oil derived from an IBPG process increase as pyrolysis temperature increases, due to the increased volatiles. Compared to a conventional biomass gasification, IBPG provides additional bio-oil as a valued by-product, releases less waste heat and offers higher energy efficiency at the same synthesis gas production rate. The IBPG process with a pyrolysis temperature of 700 °C shows the best technical performance. However, pinch analysis indicates that the IBPG process with a pyrolysis temperature of 400 °C or 500 °C and conventional biomass gasification is technically feasible; the optimum heat integration structures are achieved. The economic analysis, which considers only the reaction-related equipment, indicates that the IBPG process with a pyrolysis temperature of 500 °C offers synthesis gas and bio-oil production rates of 1.185 and 0.2044 kmol h−1, respectively, and an energy efficiency of 68.86% is most economically feasible. © 2018 Elsevier Ltd
Keywords
Process analysis
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