Activated carbon derived from peat soil as a framework for the preparation of shape-stabilized phase change material. (15th March 2015)

• Record Type: Journal Article
• Authors: Khadiran, Tumirah; Hussein, Mohd Zobir; Zainal, Zulkarnain; Rusli, Rafeadah
• Is Part Of: Energy. Volume 82(2015)
• Page Start: 468
• Page End: 478
• Publication Date: 2015-03-15
• Subjects: Phase change material -- Activated carbon -- Thermal energy storage -- n-Octadecane -- Shape-stabilized phase change materials; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2015.01.057
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: This work focuses on the preparation of AC (activated carbon) through a physical activation method using peat soil as a precursor, followed by the use of the AC as an inorganic framework for the preparation of SPCM (shape-stabilized phase change material). The SPCM, composed of n-octadecane as the core and AC pores as a framework, was fabricated by a simple impregnation method, with the mass fraction of n-octadecane varying from 10 to 90 wt.%. The AC has a specific surface area of 893 m 2 g −1 and an average pore size of 22 Å. The field emission scanning electron microscope images and nitrogen gas adsorption-desorption isotherms shows that the n-octadecane was actually encapsulated into the AC pores. The melting and freezing temperatures of the composite PCM (phase change material) were 30.9 °C and 24.1 °C, respectively, and its corresponding latent heat values were 95.4 Jg −1 and 99.6 Jg −1, respectively. The composite shows a good thermal reliability, even after 1000 melting/freezing cycles. The present research provided a new SPCM material for thermal energy storage as well as some new insights into the design of composite PCM by tailoring the pore structure of AC derived from peat soil, a natural resource. Highlights: Activated carbon from peat soil was used as framework. n-Octadecane/activated carbon composite was fabricated by impregnation method. The thermal property could be tailor by adjusting pore size of activated carbon. The shape-stabilized PCM (phase change material) have the potential to be used for thermal energy storage.