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Catalytic Pyrolysis of Sawdust with Desulfurized Fly Ash for Pyrolysis Gas Upgrading

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  • Jinling Song

    (School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China)

  • Chuyang Tang

    (School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China)

  • Xinyuan An

    (School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China)

  • Yi Wang

    (School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China)

  • Shankun Zhou

    (School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China)

  • Chunhong Huang

    (School of Civil Engineering, University of Science and Technology Liaoning, Qianshan Road, Anshan 114051, China)

Abstract

In this study, the catalytic effects of desulfurized fly ash (DFA) on the gaseous products of sawdust (SD) pyrolysis were investigated in a tubular furnace. The results indicated that DFA catalyzed the process of SD decomposition to improve the hydrogen content and the calorific value of pyrolysis gas. As to its effect on pyrolysis products, DFA increased the non-oxide content of CH 4 , C 3 H 4 , and H 2 in pyrolysis gas by 1.4-, 1.8-, and 2.3-fold, respectively. Meanwhile, the catalytic effect of DFA reduced the CO and CO 2 yields during DFA/SD pyrolysis. Based on the model compound method, CaSO 3 and Ca(OH) 2 in DFA was proved to have quite different catalytic effects on pyrolysis gas components. Ca(OH) 2 accelerated the formation of CH 4 and H 2 through the cracking of methoxyl during lignin and cellulose degradation, while CaSO 3 favored the generation of CO and CO 2 due to the carbonyl and carboxyl of lignin in SD. CaSO 3 also catalyzed SD pyrolysis to promote the C 3 H 4 yield in pyrolysis gas. Overall, the catalytic pyrolysis of SD with DFA yielded negative-carbon emission, which upgraded the quality of the pyrolysis gas.

Suggested Citation

  • Jinling Song & Chuyang Tang & Xinyuan An & Yi Wang & Shankun Zhou & Chunhong Huang, 2022. "Catalytic Pyrolysis of Sawdust with Desulfurized Fly Ash for Pyrolysis Gas Upgrading," IJERPH, MDPI, vol. 19(23), pages 1-11, November.
    • Handle: RePEc:gam:jijerp:v:19:y:2022:i:23:p:15755-:d:985236
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    References listed on IDEAS

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    1. Prashanth Reddy Buchireddy & Devin Peck & Mark Zappi & Ray Mark Bricka, 2021. "Catalytic Hot Gas Cleanup of Biomass Gasification Producer Gas via Steam Reforming Using Nickel-Supported Clay Minerals," Energies, MDPI, vol. 14(7), pages 1-21, March.
    2. Wu, Yujian & Wang, Haoyu & Li, Haoyang & Han, Xue & Zhang, Mingyuan & Sun, Yan & Fan, Xudong & Tu, Ren & Zeng, Yimin & Xu, Chunbao Charles & Xu, Xiwei, 2022. "Applications of catalysts in thermochemical conversion of biomass (pyrolysis, hydrothermal liquefaction and gasification): A critical review," Renewable Energy, Elsevier, vol. 196(C), pages 462-481.
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