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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Mass and Heat Integration in Ethanol Production Mills for Enhanced Process Efficiency and Exergy-Based Renewability Performance

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Author(s):
Silva Ortiz, Pablo A. [1, 2] ; Maciel Filho, Rubens [1] ; Posada, John [2]
Total Authors: 3
Affiliation:
[1] Univ Estadual Campinas, Sch Chem Engn, Lab Optimizat Design & Adv Proc Control LOPCA, BR-13083852 Campinas, SP - Brazil
[2] Delft Univ Technol, Fac Appl Sci, Dept Biotechnol, NL-2629 HZ Delft - Netherlands
Total Affiliations: 2
Document type: Journal article
Source: PROCESSES; v. 7, n. 10 OCT 2019.
Web of Science Citations: 0
Abstract

This paper presents the process design and assessment of a sugarcane-based ethanol production system that combines the usage of both mass and heat integration (pinch analysis) strategies to enhance the process efficiency and renewability performance. Three configurations were analyzed: (i) Base case: traditional ethanol production (1G); (ii) mass-integrated (1G2G); and (iii) mass and heat-integrated system (1G2G-HI). The overall assessment of these systems was based on complementary approaches such as mass and mass-heat integration, energy and exergy analysis, exergy-based greenhouse gas (GHG) emissions, and renewability exergy criteria. The performances of the three cases were assessed through five key performance indicators (KIPs) divided into two groups: one is related to process performance, namely, energy efficiency, exergy efficiency, and average unitary exergy cost (AUEC), and the other one is associated to environmental performance i.e., exergy-based CO2-equation emissions and renewability exergy index. Results showed a higher exergy efficiency of 50% and the lowest AUEC of all the systems (1.61 kJ/kJ) for 1G2G-HI. Furthermore, the destroyed exergy in 1G2G-HI was lower by 7% and 9% in comparison to the 1G and 1G2G cases, respectively. Regarding the exergy-based GHG emissions and renewability performance (lambda(index)), the 1G2G-HI case presented the lowest impacts in terms of the CO2-equivalent emissions (94.10 gCO(2)-eq/MJ products), while lambda(index) was found to be environmentally unfavorable (lambda = 0.77). However, lambda(index) became favorable (lambda > 1) when the useful exergy of the byproducts was considered. (AU)

FAPESP's process: 17/03091-8 - Techno-economic and environmental assessment of biorefinery technologies
Grantee:Pablo Andrés Silva Ortiz
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 17/16106-3 - Techno-economic and environmental assessment of biorefinery technologies
Grantee:Pablo Andrés Silva Ortiz
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor