Exergy efficiency based design and analysis of utilization pathways of biomasses

Hongliang Qian, Weiwei Zhu, Chang Liu, Xiaohua Lu, Georgios M. Kontogeorgis, Rafiqul Gani

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

6 Scopus citations

Abstract

The utilization of biomasses has advantages with respect to energy conservation, emission reduction and resource utilization. In this paper, the concept of functional exergy efficiency is extended as a unified approach for evaluating the effective utilization of energy in three utilization pathways of biomasses; pyrolysis, gasification and anaerobic digestion. Based on our prediction model for higher heat value (HHV) of biomass, it has been shown that the Gibbs energy minimization method can be used to simulate the pyrolysis and gasification processes of biomasses. Biogas data of anaerobic digestion process is obtained through the practical biochemical methane potential (PBMP) model. Based on our chemical exergy prediction model of biomass, functional exergy efficiencies of utilization processes of biomasses (three kinds of straws and three kinds of manures) are evaluated. It is found that the functional exergy efficiencies of gasification process of manures and straws are all greater than those of the pyrolysis process at different temperatures, and compare with pyrolysis and gasification processes after 850 °C, the functional exergy efficiencies of anaerobic digestion are the lowest.

Original languageEnglish
Title of host publicationComputer Aided Chemical Engineering
EditorsAnton Friedl, Jiří J. Klemeš, Stefan Radl, Petar S. Varbanov, Thomas Wallek
PublisherElsevier B.V.
Pages857-862
Number of pages6
ISBN (Print)9780444642356
DOIs
StatePublished - 1 Jan 2018

Publication series

NameComputer Aided Chemical Engineering
Volume43
ISSN (Print)1570-7946

Keywords

  • Biomass utilization
  • Exergy efficiency
  • Process evaluation
  • Process simulation

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