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Exergy Analysis of Alternative Configurations of Biomass-Based Light Olefin Production System with a Combined-Cycle Scheme via Methanol Intermediate

Author

Listed:
  • Yuping Li

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Maolin Ye

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
    Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, China)

  • Fenghua Tan

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Chenguang Wang

    (Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China)

  • Jinxing Long

    (School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510641, China)

Abstract

Thermodynamic performance of three conceptual systems for biomass-derived olefin production with electricity cogeneration was studied and compared via exergy analysis at the levels of system, subsystem and operation unit. The base case was composed of the subsystems of gasification, raw fuel gas adjustment, methanol/light olefin synthesis and steam & power generation, etc. The power case and fuel case were designed as the combustion of a fraction of gasification gas to increase power generation and the recycle of a fraction of synthesis tail gas to increase olefin production, respectively. It was found that the subsystems of gasification and steam & power generation contribute ca. 80% of overall exergy destruction for each case, of which gasifier and combustor are the main exergy destruction sources, due to the corresponding chemical exergy degrading of biomass and fuel gas. The low efficiency of 33.1% for the power case could be attributed to the significant irreversibility of the combustor, economizer, and condenser in the combined-cycle subsystem. The effect of the tail gas recycle ratio, moisture content of feedstock, and biomass type was also investigated to enhance system exergy performance, which could be achieved by high recycle ratio, using dry biomass and the feedstock with high carbon content. High system efficiency of 38.9% was obtained when oil palm shell was used, which was 31.7% for rice husk due to its low carbon content.

Suggested Citation

  • Yuping Li & Maolin Ye & Fenghua Tan & Chenguang Wang & Jinxing Long, 2022. "Exergy Analysis of Alternative Configurations of Biomass-Based Light Olefin Production System with a Combined-Cycle Scheme via Methanol Intermediate," Energies, MDPI, vol. 15(2), pages 1-19, January.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:2:p:404-:d:718964
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    References listed on IDEAS

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    1. Jiang, Peng & Parvez, Ashak Mahmud & Meng, Yang & Xu, Meng-xia & Shui, Tian-chi & Sun, Cheng-gong & Wu, Tao, 2019. "Exergetic, economic and carbon emission studies of bio-olefin production via indirect steam gasification process," Energy, Elsevier, vol. 187(C).
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    Cited by:

    1. Li, Yuping & Tan, Fenghua & Peng, Jiangang & Feng, Mi & Liao, Yuhe & Luo, Weimin & Dong, Kaijun & Long, Jinxing, 2023. "Exergy analysis of alternative configurations of biomass gasification-mixed alcohol production system via catalytic synthesis and fermentation," Energy, Elsevier, vol. 280(C).
    2. Wang, Yuting & Chen, Heng & Qiao, Shichao & Pan, Peiyuan & Xu, Gang & Dong, Yuehong & Jiang, Xue, 2023. "A novel methanol-electricity cogeneration system based on the integration of water electrolysis and plasma waste gasification," Energy, Elsevier, vol. 267(C).

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