Micro-scale Thermodynamic and Kinetic Analysis of a Calcium Chloride Methanol System for Process Cooling

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Micro-scale Thermodynamic and Kinetic Analysis of a Calcium Chloride Methanol System for Process Cooling. / Korhammer, Kathrin; Neumann, Karsten; Opel, Oliver; Ruck, Wolfgang K.L.

in: Energy Procedia, Jahrgang 105, 05.2017, S. 4363-4369.

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

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@article{6b4d887d19f1443fb8d2217ae4779801,
title = "Micro-scale Thermodynamic and Kinetic Analysis of a Calcium Chloride Methanol System for Process Cooling",
abstract = "Calcium chloride methanol addition compounds are promising sorbent candidates, which can not only be used for thermal energy storage but also for providing evaporative cooling in industrial applications using low-grade heat. The methanolate dissociation occurs within the working temperature range of low temperature cooling systems. Methanol has a low freezing point and high operating pressure and is less toxic and corrosive than ammonia as refrigerant. In solid-gas reactions the overall specific cooling capacity mainly depends on the sorption rate of the reaction. In general the reaction pattern follows a complex mechanism, in which the formation of intermediate phases and structural changes might occur. In this study a comprehensive micro-scale analysis on the effect of the methanol partial pressure, the thermal history of the calcium chloride, the dissociation temperature and subsequent sorption-desorption cycling on the sorption rate has been carried out. Results show that thermodynamic conditions as well as the thermal history and physicochemical properties of the material have a great influence on the sorption rate, whereas only a marginal dependence between the regeneration temperature and the sorption process was observed.",
keywords = "calcium chloride, cycle stability, kinetics, methanol, Refrigeration, TGA/DSC, Energy research",
author = "Kathrin Korhammer and Karsten Neumann and Oliver Opel and Ruck, {Wolfgang K.L.}",
year = "2017",
month = may,
doi = "10.1016/j.egypro.2017.03.928",
language = "English",
volume = "105",
pages = "4363--4369",
journal = "Energy Procedia",
issn = "1876-6102",
publisher = "Elsevier B.V.",

}

RIS

TY - JOUR

T1 - Micro-scale Thermodynamic and Kinetic Analysis of a Calcium Chloride Methanol System for Process Cooling

AU - Korhammer, Kathrin

AU - Neumann, Karsten

AU - Opel, Oliver

AU - Ruck, Wolfgang K.L.

PY - 2017/5

Y1 - 2017/5

N2 - Calcium chloride methanol addition compounds are promising sorbent candidates, which can not only be used for thermal energy storage but also for providing evaporative cooling in industrial applications using low-grade heat. The methanolate dissociation occurs within the working temperature range of low temperature cooling systems. Methanol has a low freezing point and high operating pressure and is less toxic and corrosive than ammonia as refrigerant. In solid-gas reactions the overall specific cooling capacity mainly depends on the sorption rate of the reaction. In general the reaction pattern follows a complex mechanism, in which the formation of intermediate phases and structural changes might occur. In this study a comprehensive micro-scale analysis on the effect of the methanol partial pressure, the thermal history of the calcium chloride, the dissociation temperature and subsequent sorption-desorption cycling on the sorption rate has been carried out. Results show that thermodynamic conditions as well as the thermal history and physicochemical properties of the material have a great influence on the sorption rate, whereas only a marginal dependence between the regeneration temperature and the sorption process was observed.

AB - Calcium chloride methanol addition compounds are promising sorbent candidates, which can not only be used for thermal energy storage but also for providing evaporative cooling in industrial applications using low-grade heat. The methanolate dissociation occurs within the working temperature range of low temperature cooling systems. Methanol has a low freezing point and high operating pressure and is less toxic and corrosive than ammonia as refrigerant. In solid-gas reactions the overall specific cooling capacity mainly depends on the sorption rate of the reaction. In general the reaction pattern follows a complex mechanism, in which the formation of intermediate phases and structural changes might occur. In this study a comprehensive micro-scale analysis on the effect of the methanol partial pressure, the thermal history of the calcium chloride, the dissociation temperature and subsequent sorption-desorption cycling on the sorption rate has been carried out. Results show that thermodynamic conditions as well as the thermal history and physicochemical properties of the material have a great influence on the sorption rate, whereas only a marginal dependence between the regeneration temperature and the sorption process was observed.

KW - calcium chloride

KW - cycle stability

KW - kinetics

KW - methanol

KW - Refrigeration

KW - TGA/DSC

KW - Energy research

UR - http://www.scopus.com/inward/record.url?scp=85020749478&partnerID=8YFLogxK

U2 - 10.1016/j.egypro.2017.03.928

DO - 10.1016/j.egypro.2017.03.928

M3 - Journal articles

AN - SCOPUS:85020749478

VL - 105

SP - 4363

EP - 4369

JO - Energy Procedia

JF - Energy Procedia

SN - 1876-6102

ER -

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