Abstract
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.
Highlights
Energy management is a major challenge for our society, requiring equal measures of political and scientific involvement [1]
MgO obtained by calcination of Mg(OH)2, MgCO3, and MgC2O4·2H2O was investigated regarding hydration reactivity and cycle stability
MgO obtained by calcination of Mg(OH)2, MgCO3, and MgC2O4·2H2O was compared regarding its rehydration reactivity and cycle stability to assess its applicability in thermochemical energy storage
Summary
Energy management is a major challenge for our society, requiring equal measures of political and scientific involvement [1]. Sustainable, environmentally benign energy production, and efficient utilization are key issues in managing global energy use [2]. In many cases, be better expressed as ‘heat management’, as heat is the most ubiquitous form of energy. Nanomaterials 2018, 8, 795 management may, in many cases, be better expressed as ‘heat management’, as heat is the most ubiquitous form of energy. In most types of electrical power plants, as well as in most industrial. IWrdisthoinf tohviesrcaollntgelxotb, athl eenuetirlgizyatpiorondoufcwtioanst,eisheaant, eaxccteonusnivtienlgy finovr etwstiog-athteidrdsfieolfdov[3e]r.aTllhgeloubsael eonfewrgaystperohdeuatctfiloonw, sis ianncleuxdtesnssievveelyrailnvasepsteicgtast,eodnfieeoldf [t3h]e.mThbeeuinsge otefmwpaosrtaelhdeeactofluopwlinsginocflwudaestsesheevaetralvasilpaebciltist,yoannedodfetmheamndb,eaisntghetetmwpooarraelndoetcnoeucpelsisnagriolyf wcoarsrteelahtedat Wstriitahlipnrtohciesscsoens,tehxeta,tthiseuusteidlizaastitohne dofrivwinasgtefohrceeata,nadccoopuenrtaitninggfomredtwiuom-th. iWrdisthoinf tohviesrcaollntgelxotb, athl eenuetirlgizyatpiorondoufcwtioanst,eisheaant, eaxccteonusnivtienlgy finovr etwstiog-athteidrdsfieolfdov[3e]r.aTllhgeloubsael eonfewrgaystperohdeuatctfiloonw, sis ianncleuxdtesnssievveelyrailnvasepsteicgtast,eodnfieeoldf [t3h]e.mThbeeuinsge otefmwpaosrtaelhdeeactofluopwlinsginocflwudaestsesheevaetralvasilpaebciltist,yoannedodfetmheamndb,eaisntghetetmwpooarraelndoetcnoeucpelsisnagriolyf wcoarsrteelahtedat
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