Lab-scale demonstration of thermochemical energy storage with NH₃ and impregnated-loaded zeolites

Author(s)

Danny Müller, Christian Knoll, Georg Gravogl, Andreas Werner, Ronald Miletich, Michael Harasek, Peter Weinberger

Abstract

High energy densities are one key-feature of thermochemical energy storage materials. Among the substance classes featuring the highest energy densities are oxides and carbonates, having both operational temperature profiles between 800 °C - 1200 °C. Comparable high energy contents are provided by the reaction between ammonia and (transition) metal salts, operable in a medium-temperature range between 150 °C - 450 °C. Due to the toxicity of ammonia a closed cycle preventing the release of ammonia to the surrounding environment would be necessary. Herein, CuSO4 and CuCl2 are investigated in a laboratory scale reactor for their application in thermochemical energy storage with ammonia as reactive gas. In the current setup after 80 seconds peak temperatures of 312 °C and 238 °C respectively were measured. To circumvent the notable volume expansion during the reaction with ammonia, both copper salts were loaded on zeolite 13X, yielding matrix-supported composite materials. Operation of those materials in the laboratory scale reactor under ammonia revealed, that the rapid temperature increase and the high peak temperatures could be retained, simultaneously simplifying the handling of the materials.

Organisation(s)

Department of Mineralogy and Crystallography

External organisation(s)

Technische Universität Wien

No. of pages

9

DOI

https://doi.org/10.18086/swc.2017.14.04

Publication date

2017

Peer reviewed

Yes

Austrian Fields of Science 2012

104003 Inorganic chemistry, 104011 Materials chemistry, 105113 Crystallography

Keywords

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment

Portal url

https://ucrisportal.univie.ac.at/en/publications/8455dde9-0524-49ff-9c41-4fb8d3a0534f