Next Article in Journal
A Novel [email protected] as Self-Calibrating Luminescent Sensor for Nutritional Antioxidant
Next Article in Special Issue
New Composite Water Sorbents CaCl2-PHTS for Low-Temperature Sorption Heat Storage: Determination of Structural Properties
Previous Article in Journal
Isolation of Nb2Se9 Molecular Chain from Bulk One-Dimensional Crystal by Liquid Exfoliation
Previous Article in Special Issue
Synthesis of Me Doped Mg(OH)2 Materials for Thermochemical Heat Storage
Open AccessArticle

Cycle Stability and Hydration Behavior of Magnesium Oxide and Its Dependence on the Precursor-Related Particle Morphology

1
Department of Mineralogy and Crystallography, University of Vienna, Althanstraße 14, 1090 Vienna, Austria
2
Institute of Applied Synthetic Chemistry, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
3
Institute of Chemical, Environmental & Biological Engineering, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
4
Atominstitut, TU Wien, Stadionallee 2, 1020 Vienna, Austria
5
X-ray Center, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
6
RHI-AG, Magnesitstraße 2, 8700 Leoben, Austria
7
Institute of Chemical Technologies and Analytics, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
8
Institute for Energy Systems and Thermodynamics, TU Wien, Getreidemarkt 9, 1060 Vienna, Austria
9
Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Vienna, Austria
*
Author to whom correspondence should be addressed.
Nanomaterials 2018, 8(10), 795; https://doi.org/10.3390/nano8100795
Received: 31 August 2018 / Revised: 1 October 2018 / Accepted: 2 October 2018 / Published: 7 October 2018
Thermochemical energy storage is considered as an auspicious method for the recycling of medium-temperature waste heat. The reaction couple Mg(OH)2–MgO is intensely investigated for this purpose, suffering so far from limited cycle stability. To overcome this issue, Mg(OH)2, MgCO3, and MgC2O4·2H2O were compared as precursor materials for MgO production. Depending on the precursor, the particle morphology of the resulting MgO changes, resulting in different hydration behavior and cycle stability. Agglomeration of the material during cyclization was identified as main reason for the decreased reactivity. Immersion of the spent material in liquid H2O decomposes the agglomerates restoring the initial reactivity of the material, thus serving as a regeneration step. View Full-Text
Keywords: particle morphology; magnesium hydroxide; magnesium carbonate; magnesium oxalate; magnesium oxide; cycle stability; in-situ powder X-ray diffraction (PXRD); hydration reactivity; thermochemical energy storage; thermochemistry particle morphology; magnesium hydroxide; magnesium carbonate; magnesium oxalate; magnesium oxide; cycle stability; in-situ powder X-ray diffraction (PXRD); hydration reactivity; thermochemical energy storage; thermochemistry
Show Figures

Figure 1

MDPI and ACS Style

Gravogl, G.; Knoll, C.; Welch, J.M.; Artner, W.; Freiberger, N.; Nilica, R.; Eitenberger, E.; Friedbacher, G.; Harasek, M.; Werner, A.; Hradil, K.; Peterlik, H.; Weinberger, P.; Müller, D.; Miletich, R. Cycle Stability and Hydration Behavior of Magnesium Oxide and Its Dependence on the Precursor-Related Particle Morphology. Nanomaterials 2018, 8, 795.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop