Co-pyrolysis of Miscanthus Sacchariflorus and coals: A systematic study on the synergies in thermal decomposition, kinetics and vapour phase products

Abstract

In this work, co-pyrolysis of Miscanthus Sacchariflorus (MS) and three ranks of coal, namely lignite (LC), bituminous coal (BC), and anthracite (AC), was performed at the analytical scale. The co-pyrolysis kinetic and products were analysed and compared theoretically and experimentally. The results revealed the synergistic effects of the coal characterstics and biomass blend ratio (BBR) on the thermal decomposition and the products in gaseous phase. The co-pyrolysis of MS-LC and MS-BC samples was characterised by three distinct stages, which were sequentially dominated by moisture removal, decomposition of MS and decomposition of coal. The activation energies of the co-pyrolysis process were different from the activation energies of the pyrolysis of individual MS and coal samples. The kinetics analysis showed that increasing the BBR increased the activation energies of the MS-coal blends up to 25% at the temperatures below 350 °C. However, at the higher temperature range, it decreased the activation energies of MS-LC and MS-BC blends but increased those of MS-AC blends. Both of the coal rank and BBR had noticeable impacts on the thermal behaviour during co-pyrolysis. The optimum positive synergistic effects were obtained on MS-LC blend with a BBR of 1:1. The FTIR analysis results showed the evolution profiles of CH4, CO, CO2, water, formic acid, phenol and xylene. All the products analysed showed L-peaks (250–400 °C) corresponding to MS decomposition. Increasing the BBR promoted the release of all the analysed products from MS-LC and MS-BC, indicating the synergistic effect of the co-pyrolysis.

Publication DOI: https://doi.org/10.1016/j.fuel.2019.116603
Divisions: Engineering & Applied Sciences > Chemical Engineering & Applied Chemistry
Engineering & Applied Sciences > Aston Institute of Materials Research (AIMR)
Engineering & Applied Sciences
Engineering & Applied Sciences > European Bioenergy Research Institute (EBRI)
Additional Information: © 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Funding: Natural Science Foundation of China for Young Scholars (No.51706022), the Natural Science Foundation of Hunan Province of China for Young Scholars (No.2018JJ3545), the Excellent Youth Foundation of Hunan Educational Committee of China (No.16B001). EU Horizon 2020 Research and Innovation Programme under the Marie Skłodowska-Curie Action (Grant Agreement No. 823745).
Uncontrolled Keywords: Biomass-coal blend,Co-pyrolysis,Miscanthus Sacchariflorus,Synergistic effect,Chemical Engineering(all),Fuel Technology,Energy Engineering and Power Technology,Organic Chemistry
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Related URLs: https://linking ... 01623611931957X (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2020-02-15
Published Online Date: 2019-11-18
Accepted Date: 2019-11-05
Authors: Tian, Hong
Jiao, Hao
Cai, Junmeng
Wang, Jiawei ( 0000-0001-5690-9107)
Yang, Yang ( 0000-0003-2075-3803)
Bridgwater, Anthony V. ( 0000-0001-7362-6205)

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Access Restriction: Restricted to Repository staff only until 18 November 2020.

License: Creative Commons Attribution Non-commercial No Derivatives


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