Abstract
In this paper, Metal Organic Framework (MOF) undergoes N2 and water adsorption experiment to observe how the material properties affects the water sorption performance. The achieved N2 isotherms is used to estimate the BET surface area, pore volume and, most importantly, the pore size distribution of the adsorbent material. It is noted that Aluminium Fumarate and CAU-10 has pore distribution of about 6Å while MIL-101(Cr) has 16 Å. The water adsorption isotherms at 25°C shows MIL-101(Cr) has a long hydrophobic length from relative pressure of 0 ≤ P/Ps ≤ 0.4 with a maximum water uptake of 1kg/kg sorbent. Alkali metal ions doped MIL-101(Cr) reduced the hydrophobic length and maximum water uptake of original MIL-101(Cr). Aluminium Fumarate and CAU-10 has lower water uptake, but the hydrophobic length of both materials is within relative pressure of P/Ps ≤ 0.2. The kinetic behaviour of doped MIL-101(Cr), Aluminium Fumarate and CAU-10 are faster than MIL-101(Cr).
Highlights
The specialty of adsorption cooling system has caught many attentions in recent years
Metal Organic Framework (MOF) adsorbents were experimented through N2 adsorption and water adsorption test
The N2 isotherms showed the large number of macro pores can be found in Aluminium Fumarate surface
Summary
The specialty of adsorption cooling system has caught many attentions in recent years. Many researches have been ongoing for MOF + water system [6,7,8,9] with high potential of replacing the conventional material due to higher water uptake – offtake difference based on its ‘S’ – shaped isotherm. These material properties are able to reduce the size of the adsorption chiller, it may improve the performance of the cooling application. These materials show great potential in replacing the existing adsorbents for adsorption cooling system
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More From: IOP Conference Series: Materials Science and Engineering
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