Synthesis of Me Doped Mg(OH)₂ Materials for Thermochemical Heat Storage

Elpida Piperopoulos; Marianna Fazio; Emanuela Mastronardo

doi:10.3390/nano8080573

Synthesis of Me Doped Mg(OH)₂ Materials for Thermochemical Heat Storage

Nanomaterials (Basel). 2018 Jul 26;8(8):573. doi: 10.3390/nano8080573.

Authors

Elpida Piperopoulos^{1

2}, Marianna Fazio³, Emanuela Mastronardo^{4

5}

Affiliations

¹ Department of Engineering, University of Messina, 98166 Messina, Italy. epiperopoulos@unime.com.
² National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Firenze, Italy. epiperopoulos@unime.com.
³ Department of Engineering, University of Messina, 98166 Messina, Italy. faziom@unime.it.
⁴ Institute of Advanced Studies of Madrid (IMDEA), Thermochemical Processes Unit, 28935 Madrid, Spain. emanuela.mastronardo@northwestern.edu.
⁵ Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208, USA. emanuela.mastronardo@northwestern.edu.

Abstract

In order to investigate the influence of metal (Me) doping in Mg(OH)₂ synthesis on its thermochemical behavior, Ca²⁺, Co²⁺ and Ni²⁺ ions were inserted in Mg(OH)₂ matrix and the resulting materials were investigated for structural, morphological and thermochemical characterization. The densification of the material accompanied by the loss in porosity significantly influenced the hydration process, diminishing the conversion percentage and the kinetics. On the other hand, it increased the volumetric stored/released heat capacity (between 400 and 725 MJ/m³), reaching almost three times the un-doped Mg(OH)₂ value.

Keywords: magnesium hydroxide; metal doping; thermochemical heat storage.