The first operating thermolytic reverse electrodialysis heat engine

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Abstract

Thermolytic reverse electrodialysis heat engine (t-RED HE) has been recently proposed as a technology for converting low-temperature waste heat into electricity. The construction and operation of the first world labscale prototype unit are reported. The system consists of: (i) a reverse electrodialysis unit where, the concentration gradient between two solutions of thermolytic salts is converted into electricity and (ii) a thermallydriven regeneration unit where low-temperature heat is used to restore the initial conditions of the two feed streams. Regeneration is based on a degradation process of salts into gaseous ammonia and carbon dioxide, which can be removed almost entirely from the exhausted dilute solution by vapour stripping and, subsequently, reabsorbed into the exhausted concentrate solution, thus restoring the initial salinity gradient of the two streams. For the first time, the feasibility of the process was demonstrated through an experimental campaign to evaluate the system performance via long-run tests.
Original languageEnglish
Number of pages12
JournalJournal of Membrane Science
Volume595
Publication statusPublished - 2020

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Filtration and Separation

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