High potential of employing bentonite in adsorption cooling systems driven by low grade heat source temperatures

Ahmed A. Askalany; Sebastian Johannes Ernst; Philipp P.C. Hügenell; Hans Jörg Bart; Stefan K. Henninger; Ahmed S. Alsaman

doi:10.1016/j.energy.2017.07.171

High potential of employing bentonite in adsorption cooling systems driven by low grade heat source temperatures

Ahmed A. Askalany^*
, Sebastian Johannes Ernst
, Philipp P.C. Hügenell
, Hans Jörg Bart
, Stefan K. Henninger
, Ahmed S. Alsaman

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

30 Scopus citations

Abstract

In this research article a new modified adsorbent has been presented to be used in thermally driven adsorption systems for renewable energy applications. Bentonite is introduced as a cheap adsorbent with high potential for use in heat pumps or chillers driven by renewable energy. A simple acid activation procedure increases the inner surface of the material and also enhances the water adsorption capacity markedly. The raw bentonite is activated with different concentrations (0.2, 0.4, 0.6 mol L⁻¹) of HCl. FT-IR, XRD, N₂ adsorption, water adsorption and heat capacity measurements have been carried out for the raw and HCl activated bentonite. The acid activation process increased the surface area of the bentonite from 64 m² g⁻¹ to a level of 500 m² g⁻¹. In that respect the maximum adsorption capacity has markedly increased by the acid activation. Experimental and theoretical studies for the adsorption isotherms and kinetics at different adsorption temperatures of water vapor onto 0.6 HCl treated bentonite have been conducted. A simulation for an adsorption cooling system employing treated bentonite has been presented. The performance of the modeled system has been also studied to be driven by low grade heat source temperatures at different operating conditions.

Original language	English
Pages (from-to)	782-791
Number of pages	10
Journal	Energy
Volume	141
DOIs	https://doi.org/10.1016/j.energy.2017.07.171
State	Published - 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

Keywords

Adsorption
Adsorption heat pump
Bentonite
Thermal heat storage

ASJC Scopus subject areas

Civil and Structural Engineering
Modeling and Simulation
Renewable Energy, Sustainability and the Environment
Building and Construction
Fuel Technology
Energy Engineering and Power Technology
Pollution
Mechanical Engineering
General Energy
Management, Monitoring, Policy and Law
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.energy.2017.07.171

Cite this

@article{8aea307be71d451b9533d6b8ff5ac458,

title = "High potential of employing bentonite in adsorption cooling systems driven by low grade heat source temperatures",

abstract = "In this research article a new modified adsorbent has been presented to be used in thermally driven adsorption systems for renewable energy applications. Bentonite is introduced as a cheap adsorbent with high potential for use in heat pumps or chillers driven by renewable energy. A simple acid activation procedure increases the inner surface of the material and also enhances the water adsorption capacity markedly. The raw bentonite is activated with different concentrations (0.2, 0.4, 0.6 mol L−1) of HCl. FT-IR, XRD, N2 adsorption, water adsorption and heat capacity measurements have been carried out for the raw and HCl activated bentonite. The acid activation process increased the surface area of the bentonite from 64 m2 g−1 to a level of 500 m2 g−1. In that respect the maximum adsorption capacity has markedly increased by the acid activation. Experimental and theoretical studies for the adsorption isotherms and kinetics at different adsorption temperatures of water vapor onto 0.6 HCl treated bentonite have been conducted. A simulation for an adsorption cooling system employing treated bentonite has been presented. The performance of the modeled system has been also studied to be driven by low grade heat source temperatures at different operating conditions.",

keywords = "Adsorption, Adsorption heat pump, Bentonite, Thermal heat storage",

author = "Askalany, \{Ahmed A.\} and Ernst, \{Sebastian Johannes\} and H{\"u}genell, \{Philipp P.C.\} and Bart, \{Hans J{\"o}rg\} and Henninger, \{Stefan K.\} and Alsaman, \{Ahmed S.\}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

doi = "10.1016/j.energy.2017.07.171",

language = "English",

volume = "141",

pages = "782--791",

journal = "Energy",

issn = "0360-5442",

}

TY - JOUR

T1 - High potential of employing bentonite in adsorption cooling systems driven by low grade heat source temperatures

AU - Askalany, Ahmed A.

AU - Ernst, Sebastian Johannes

AU - Hügenell, Philipp P.C.

AU - Bart, Hans Jörg

AU - Henninger, Stefan K.

AU - Alsaman, Ahmed S.

PY - 2017

Y1 - 2017

N2 - In this research article a new modified adsorbent has been presented to be used in thermally driven adsorption systems for renewable energy applications. Bentonite is introduced as a cheap adsorbent with high potential for use in heat pumps or chillers driven by renewable energy. A simple acid activation procedure increases the inner surface of the material and also enhances the water adsorption capacity markedly. The raw bentonite is activated with different concentrations (0.2, 0.4, 0.6 mol L−1) of HCl. FT-IR, XRD, N2 adsorption, water adsorption and heat capacity measurements have been carried out for the raw and HCl activated bentonite. The acid activation process increased the surface area of the bentonite from 64 m2 g−1 to a level of 500 m2 g−1. In that respect the maximum adsorption capacity has markedly increased by the acid activation. Experimental and theoretical studies for the adsorption isotherms and kinetics at different adsorption temperatures of water vapor onto 0.6 HCl treated bentonite have been conducted. A simulation for an adsorption cooling system employing treated bentonite has been presented. The performance of the modeled system has been also studied to be driven by low grade heat source temperatures at different operating conditions.

AB - In this research article a new modified adsorbent has been presented to be used in thermally driven adsorption systems for renewable energy applications. Bentonite is introduced as a cheap adsorbent with high potential for use in heat pumps or chillers driven by renewable energy. A simple acid activation procedure increases the inner surface of the material and also enhances the water adsorption capacity markedly. The raw bentonite is activated with different concentrations (0.2, 0.4, 0.6 mol L−1) of HCl. FT-IR, XRD, N2 adsorption, water adsorption and heat capacity measurements have been carried out for the raw and HCl activated bentonite. The acid activation process increased the surface area of the bentonite from 64 m2 g−1 to a level of 500 m2 g−1. In that respect the maximum adsorption capacity has markedly increased by the acid activation. Experimental and theoretical studies for the adsorption isotherms and kinetics at different adsorption temperatures of water vapor onto 0.6 HCl treated bentonite have been conducted. A simulation for an adsorption cooling system employing treated bentonite has been presented. The performance of the modeled system has been also studied to be driven by low grade heat source temperatures at different operating conditions.

KW - Adsorption

KW - Adsorption heat pump

KW - Bentonite

KW - Thermal heat storage

UR - https://www.scopus.com/pages/publications/85030466587

U2 - 10.1016/j.energy.2017.07.171

DO - 10.1016/j.energy.2017.07.171

M3 - Article

AN - SCOPUS:85030466587

SN - 0360-5442

VL - 141

SP - 782

EP - 791

JO - Energy

JF - Energy

ER -

High potential of employing bentonite in adsorption cooling systems driven by low grade heat source temperatures

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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