Fast Catalytic Co-pyrolysis Characteristics and Kinetics of Chlorella Vulgaris and Municipal Solid Waste over Hierarchic
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Fast Catalytic Co-pyrolysis Characteristics and Kinetics of Chlorella Vulgaris and Municipal Solid Waste over Hierarchical ZSM-5 Zeolite Yang Li 1,2 & Zhaosheng Yu 1,2
&
Liyao Chen 1,2 & Fangfang Tang 1,2 & Xiaoqian Ma 1,2
Received: 3 May 2020 / Accepted: 21 August 2020 # Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract In this work, catalytic co-pyrolysis characteristics and kinetics of chlorella vulgaris (CV), municipal solid waste (MSW), and their blends over hierarchical ZSM-5 zeolite were studied by thermogravimetric analysis (TGA) and pyrolysis-gas chromatography/ mass spectrometry (Py-GC/MS). Moreover, three zeolite additives, namely, ZSM-5, Al-MCM-41, and Al-SBA-15, were selected to compare their effects on catalytic co-pyrolysis and coking characteristics with hierarchical ZSM-5 zeolite. Results showed that co-pyrolysis of CV and MSW demonstrated significant synergistic effects at 260–330 °C, especially at the ratio of 5:5. Two model-free methods, Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS), were used to calculate the kinetic parameters. Product distribution results demonstrated that co-pyrolysis could improve pyrolysis products by increasing monocyclic aromatic hydrocarbons and aliphatic hydrocarbons as well as reducing polycyclic aromatic hydrocarbons and nitrogen compounds. Compared with other three kinds of zeolite additives, hierarchical ZSM-5 with both micropores and mesopores achieved superior monocyclic aromatic hydrocarbon selectivity (34.14%) and inferior acid selectivity (9.54%) for co-pyrolysis, thereby satisfying the preferred criteria. In addition, the difference from the thermogravimetric curve between after pyrolysis and fresh zeolites indicated that hierarchical ZSM-5 also had the best coking resistance. In brief, co-pyrolysis of chlorella vulgaris and municipal solid waste with hierarchical ZSM-5 was definitely a feasible way for high-quality bio-oil generation. Keywords Catalytic pyrolysis . Municipal solid waste . Microalgae . Thermogravimetric analysis . Chemical composition . Hierarchical zeolite
Introduction The increasing fossil fuel exhaustion and environmental pollution are inevitably threatening the world development and Highlights • The synergy of CV and MSW optimized pyrolysis product distributions. • Hi-ZSM-5 achieved the superior MAHs selectivity and inferior acids selectivity. • Co-pyrolysis lowered the activation energy of 70% MSW with 30%CV. • Hi-ZSM-5 had better coking resistance compared with unmodified zeolites. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s12155-020-10185-w) contains supplementary material, which is available to authorized users. * Zhaosheng Yu [email protected] 1
School of Electric Power, South China University of Technology, 381 Wushan Rd., Guangzhou 510640, China
2
Guangdong Province Key Laboratory of Efficient and Clean Energy Utilization, Guangzhou 510640, China
economic growth. As the carbon-containing renewable source, biomass can be expected to sol
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