Loughborough University
Leicestershire, UK
LE11 3TU
+44 (0)1509 263171
Loughborough University

Loughborough University Institutional Repository

Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/24715

Title: An experimental investigation to assess the potential of using MgSO 4 impregnation and Mg 2+ ion exchange to enhance the performance of 13X molecular sieves for interseasonal domestic thermochemical energy storage
Authors: Mahon, Daniel
Claudio, Gianfranco
Eames, Philip C.
Keywords: Thermochemical energy storage
Magnesium Sulfate
Zeolite-Y
Molecular sieves
Ion exchange
Thermal analysis
Issue Date: 2017
Publisher: © The Author(s). Published by Elsevier Ltd.
Citation: MAHON, D., CLAUDIO, G. and EAMES, P.C., 2017. An experimental investigation to assess the potential of using MgSO 4 impregnation and Mg 2+ ion exchange to enhance the performance of 13X molecular sieves for interseasonal domestic thermochemical energy storage. Energy Conversion and Management, http://doi.org/10.1016/j.enconman.2017.03.080
Abstract: The need to develop renewable heat sources for domestic space heating is a well known problem, for solar thermal systems mismatch between generation and load is a major issue, and thermochemical interseasonal heat storage offers a solution to this problem. Recent research has shown that using an absorbent material as a host for salt hydrates can be advantageous in achieving a high energy density material while alleviating the problematic practical characteristics, such as agglomeration, which salt hydrates typically possess. In this paper results are presented for a 13X molecular sieve which was tested to determine its potential for interseasonal domestic thermochemical energy storage alone and as a host material for Magnesium Sulfate (MgSO4). Two different impregnation preparation methods have been utilised in our experiments, (i) a wetness impregnation method and (ii) a new method in which 13X molecular sieve powders and MgSO4 are formed into pellets with use of a binder. The materials produced by each method were tested against each other and compared to a zeolite-Y material to assess which is the best candidate material for thermal energy storage. The impact of ion exchange on the energy storage potential of the 13X materials was also investigated. Analysis of the materials characteristics and thermal performance was conducted using a Differential Scanning Calorimeter (DSC), Thermogravimetric Analyser (TGA) coupled with a Residual Gas Analyser (RGA), Scanning Electron Microscope (SEM) with Energy Dispersive X-ray (EDX) spectroscopy and a custom built fixed bed 200 g in-situ hydration and dehydration chamber to assess the materials performance on a larger scale. The results demonstrate that the thermochemical storage potential of the 13X molecular sieve was enhanced following a Mg2+ ion exchange process, resulting in a maximum increased energy storage of approximately 14% (65 J/g) compared to standard non treated 13X pellets.
Description: This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
Sponsor: This work was supported in full by the UK Engineering and Physical Sciences Research Council (EPSRC) (grant number: EP/ K011847/1), i-STUTE and a Loughborough University PhD studentship.
Version: Published
DOI: 10.1016/j.enconman.2017.03.080
URI: https://dspace.lboro.ac.uk/2134/24715
Publisher Link: http://dx.doi.org/10.1016/j.enconman.2017.03.080
ISSN: 0196-8904
Appears in Collections:Published Articles (Mechanical, Electrical and Manufacturing Engineering)

Files associated with this item:

File Description SizeFormat
2017 An experimental investigation to assess the potential of using MgSO4.pdfPublished version1.19 MBAdobe PDFView/Open

 

SFX Query

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.