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Exergy as a tool for measuring process intensification in chemical engineering

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Luis Alconero, Patricia [UCL]

Exergy is defined as the maximum shaft work that can be done in a process to bring the system into equilibrium with the environment. Thus, exergy analyses are the first step to understand where the weak points of processes are. It considers intrinsically the quality of energy: when energy loses its quality, exergy is destroyed. In addition, optimization of processes aiming at the minimization of exergy destruction can be done as a function of the topology and physical characteristics of the system, such as finite dimensions, shapes, materials, finite speeds, and finite-time intervals of operation, establishing a direct relationship between exergy and process intensification. However, the emphasis on exergy in chemical engineering is still very poor compared with other fields, in spite of being one of the areas in which more exergy is destroyed due to reaction and separation. This paper gives an overview of the current application of exergy analyses in chemical engineering, showing the main fields in which exergy studies are performed and focusing the attention on two critical points of action: separation technologies (distillation and membrane technology) and CO2 capture. New research trends in chemical engineering using exergy as a tool for process intensification are highlighted. © 2013 Society of Chemical Industry.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 2013
Language Anglais
Journal information "Journal of Chemical Technology and Biotechnology" - Vol. 88, no.11, p. 1951-1958 (2013)
Peer reviewed yes
issn 0268-2575
Publication status Publié
Affiliation UCL - SST/IMMC/IMAP - Materials and process engineering
Keywords CO2 capture ; Quality of energies ; Research trends ; Separation technologies ; Carbon dioxide ; Chemical engineering ; Distillation ; Membrane technology ; Separation ; Tools ; Exergy ; Exergy ; Carbon dioxide ; Analytical parameters ; Chemical engineering ; Distillation ; Energy balance ; Exergy ; Mathematical analysis ; Measurement ; Membrane ; Membrane technology ; Process intensification ; Process control ; Review ; Separation technique ; Technology ; Thermodynamics ; Separation ; Exergy destructions ; Finite dimensions ; Finite time intervals ; Physical characteristics ; Process intensification
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Bibliographic reference Luis Alconero, Patricia. Exergy as a tool for measuring process intensification in chemical engineering. In: Journal of Chemical Technology and Biotechnology, Vol. 88, no.11, p. 1951-1958 (2013)
Permanent URL http://hdl.handle.net/2078.1/135908