Experimental Study on the Influence of Metal Doping on Thermophysical Properties of Porous Aluminum Fumarate

Abstract

Metal-organic frameworks (MOFs) are emerging as potential adsorbents for adsorption based systems intended for various applications. Aluminum fumarate is one of the promising MOFs for being used as an adsorbent for water-based adsorption heat pumps. Though there have been a lot of studies regarding water adsorption characterization of aluminum fumarate, there is hardly any literature addressing the thermophysical properties. A green synthesis process is developed to enhance the thermophysical properties of MOFs. Transition metals (Nickel and Cobalt) are doped with parent aluminum fumarate at different weight percentage (5 wt%, 10 wt% and 20 wt%) during the synthesis. We measured and compared the specific heat capacity and thermal conductivity of parent aluminum fumarate and the six other modified samples. The current study shows that the specific heat capacity decreases whereas the thermal conductivity increases in accordance with the doping concentration. Among the studied samples, 20 wt% Cobalt-doped aluminum fumarate is found to have the lowest specific heat capacity and the highest thermal conductivity. These findings are crucial for the design and performance prediction of adsorption heat pumps.

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Notes on contributors

Israt Jahan

Israt Jahan is currently a doctoral student at Kyushu University, Japan. She has completed her B.Sc. and M.Sc. from the Department of Applied Chemistry and Chemical Engineering, University of Dhaka, Bangladesh. Her research interests are focused on adsorption, development of new adsorbent, metal-organic frameworks-synthesis and application as adsorbent and thermophysical characterization of adsorbent materials.

Md. Amirul Islam

Md. Amirul Islam is an assistant professor of Electronics and Telecommunication Engineering Department of Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalganj, Bangladesh. He has completed his B.Sc. and M.Sc. from University of Dhaka. He obtained his M.Eng. (2016) and Ph.D. (2019) degree from Energy and Environmental Engineering Department of Kyushu University, Japan. Currently he is working as a researcher in International Institute for Carbon-Neutral Energy Research (I²CNER) of Kyushu University. His research focuses on the performance enhancement of adsorption cooling system, functional adsorbent characterization, pore shaping of adsorbents, and environmental impact assessment from cooling systems.

M. L. Palash

M L Palash is an assistant professor of the Department of Electrical and Electronic Engineering at the University of Dhaka. He has completed his B.Sc. and M.Sc. from the University of Dhaka in 2005 and 2006, respectively. He has obtained his second M.S. in engineering degree from Kyushu University, Japan in 2017. Now he is on a doctoral study in energy and environmental engineering in the same university. His research focuses on the fundamentals of adsorption, metal-organic frameworks and energetic characterization of porous materials.

Kaiser Ahmed Rocky

Kaiser Ahmed Rocky is a faculty member of Physics Department at University of Dhaka, Bangladesh. He obtained his B.S. and M.S. degrees from the Department of Applied Physics, University of Dhaka, Bangladesh. Currently, he is a doctoral student at Kyushu University, Japan. His research interests include applied thermal science, adsorption, and thermophysical characterization of porous materials and composites.

Tahmid Hasan Rupam

Tahmid Hasan Rupam is currently pursuing his Ph.D. at Saha Laboratory, International Institute of Carbon-Neutral Energy Research, Kyushu University, Japan. He obtained his Master of engineering degree from the Department of Energy and Environment Engineering, Kyushu University, Japan in 2019. His main research interests are focused on fundamentals of adsorption thermodynamics, synthesis of new adsorbents, metal organic frameworks and molecular dynamic simulations.

Bidyut Baran Saha

Bidyut Baran Saha is a Professor and Principal Investigator at the International Institute for Carbon-Neutral Energy Research (WPI-I2CNER) of Kyushu University, Japan. He received his B.Sc. (Hons.) and M.Sc. degrees from Dhaka University of Bangladesh. He received his Ph.D. in 1997 from the Tokyo University of Agriculture and Technology, Japan. His research interests include thermally powered adsorption systems, heat and mass transfer analysis, and energy efficiency assessment. He has published more than 400 articles in peer-reviewed journals and international conference proceedings. He has edited seven books and holds thirty-one patents. Recently, he served as managing Guest Editor for Applied Thermal Engineering, Heat Transfer Engineering, and International Journal of Refrigeration.