A comparative thermodynamic evaluation of bioethanol processing from wheat straw

Geoffrey Hammond, Ross Mansell

Research output: Contribution to journalArticle

Abstract

The thermodynamic implications of different bioethanol production routes from wheat straw (a cellulosic coproduct or ‘waste’ stream) have been evaluated. Comparative thermodynamic (energy and exergy) analysis gives rise to alternative insights into the relative performance of various process chains. Energy analysis of four different production paths were firstly analysed via the consideration of mechanical work, temperature changes and separating techniques. The Net Energy Value (NEV) of each production path or route was then evaluated, including the effect of system boundary expansion. In contrast, the thermodynamic property known as ‘exergy’ reflects the ability of undertake ‘useful work’, but does not represent well heating processes. Exergetic efficiencies were consequently obtained via chemical and physical exergy calculations, along with some of the electrical inputs to the different processes. The exergetic ’improvement potentials’ of the process stages were then determined using the exergetic efficiencies and irreversibility values respectively. These estimates will enable industrialists and policy makers to take account of some of the ramifications of alternative bioethanol production routes in a low carbon future.
LanguageEnglish
Pages136-146
Number of pages11
JournalApplied Energy
Volume224
Early online date4 May 2018
DOIs
StatusPublished - 15 Aug 2018

Fingerprint

Bioethanol
exergy
Straw
straw
Exergy
wheat
thermodynamics
Thermodynamics
Processing
energy
thermodynamic property
Industrial heating
heating
Thermodynamic properties
carbon
Carbon
evaluation
temperature
analysis
Temperature

Keywords

  • Bioethanol production
  • Wheat straw
  • Biofuel blends
  • Thermodynamic analysis

Cite this

A comparative thermodynamic evaluation of bioethanol processing from wheat straw. / Hammond, Geoffrey; Mansell, Ross.

In: Applied Energy, Vol. 224, 15.08.2018, p. 136-146.

Research output: Contribution to journalArticle

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