Water Adsorption on Various Metal Organic Framework

In this paper, Metal Organic Framework (MOF) undergoes N-2 and water adsorption experiment to observe how the material properties affects the water sorption performance. The achieved N-2 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 6 angstrom while MIL-101(Cr) has 16 angstrom. The water adsorption isotherms at 25 degrees C shows MIL-101(Cr) has a long hydrophobic length from relative pressure of 0 <= P/P-s <= 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/P-s <= 0.2. The kinetic behaviour of doped MIL-101(Cr), Aluminium Fumarate and CAU-10 are faster than MIL-101(Cr).