Reactive pellets for improved solar hydrogen production based on sodium manganese ferrite thermochemical cycle

Carlo Alvani, Mariangela Bellusci, Aurelio La Barbera, Franco Padella, Marzia Pentimalli, Luca Seralessandri, Francesca Varsano

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Abstract

Hydrogen production by water-splitting thermochemical cycle based on manganese ferrite/sodium carbonate reactive system is reported. Two different preparation procedures for manganese ferrite/sodium carbonate mixture were adopted and compared in terms of material capability to cyclical hydrogen production. According to the first procedure, conventionally synthesized manganese ferrite, i.e., high temperature (1250 °C)heating in Ar of carbonate/oxide precursors, was mixed with sodium carbonate. The blend was tested inside a temperature programed desorption reactor using a cyclical hydrogen production/material regeneration scheme. After a few cycles, the mixture resulte rapidly passivated and unable to further produce hydrogen. An innovative method that avoids the high temperature synthesis of manganese ferrite is presented. This procedure consists in a set of consecutive thermal treatments of a manganese carbonate/ sodium carbonate/iron oxide mixture in different environments (inert, oxidative, and reducing) at temperatures not exceeding 750°C. Such material, whose observed chemical composition consists of manganese ferrite and sodium carbonate in stoichiometric amounts, is able to evolve hydrogen during 25 consecutive water-splitting cycles, with a small decrease in cyclical production efficiency. © 2009 by ASME.
Original languageEnglish
Pages (from-to)0310151 - 0310155
Number of pages5
JournalJournal of Solar Energy Engineering, Transactions of the ASME
Volume131
Issue number3
DOIs
Publication statusPublished - Aug 2009
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment

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