TY - JOUR
T1 - Metal-organic frameworks with high working capacities and cyclic hydrothermal stabilities for fresh water production
AU - Kim, Seung Ik
AU - Yoon, Tae Ung
AU - Kim, Min Bum
AU - Lee, Seung Joon
AU - Hwang, Young Kyu
AU - Chang, Jong San
AU - Kim, Hyun Jong
AU - Lee, Ho Nyun
AU - Lee, U. Hwang
AU - Bae, Youn Sang
PY - 2016/2/15
Y1 - 2016/2/15
N2 - In this work, we evaluated the working capacities of eight hydrothermally stable metal-organic frameworks (MOFs) for water adsorption under typical humidity conditions in three representative dry regions. Remarkably, three MIL-100(M) materials (M=Cr, Al, and Fe) and MIL-101(Cr) exhibited very high working capacities for medium and high humidity conditions due to their large surface areas. All of the MOFs consisting of only MIII sites (MIL-101(Cr), MIL-100(Cr), and MIL-100(Al)) showed good cyclic water adsorption/desorption performances and good hydrothermal stabilities. Due to the presence of FeII sites formed during activation at 250°C, MIL-100(Fe) showed a considerable decrease in its water adsorption isotherm during the 2nd cycle although almost unchanged water uptakes were observed in the following cycles. When MIL-100(Fe) was activated at 150°C (MIL-100(Fe)_150) to prevent formation of FeII sites, the sample showed good cyclic adsorption/desorption performance and good hydrothermal stability. Considering the high working capacities, cyclic adsorption/desorption behaviors, and good hydrothermal stabilities, MIL-101(Cr), MIL-100(Cr), MIL-100(Al) and MIL-100(Fe)_150 are promising adsorbents for producing drinking water in dry regions with medium or high humidity conditions during the night.
AB - In this work, we evaluated the working capacities of eight hydrothermally stable metal-organic frameworks (MOFs) for water adsorption under typical humidity conditions in three representative dry regions. Remarkably, three MIL-100(M) materials (M=Cr, Al, and Fe) and MIL-101(Cr) exhibited very high working capacities for medium and high humidity conditions due to their large surface areas. All of the MOFs consisting of only MIII sites (MIL-101(Cr), MIL-100(Cr), and MIL-100(Al)) showed good cyclic water adsorption/desorption performances and good hydrothermal stabilities. Due to the presence of FeII sites formed during activation at 250°C, MIL-100(Fe) showed a considerable decrease in its water adsorption isotherm during the 2nd cycle although almost unchanged water uptakes were observed in the following cycles. When MIL-100(Fe) was activated at 150°C (MIL-100(Fe)_150) to prevent formation of FeII sites, the sample showed good cyclic adsorption/desorption performance and good hydrothermal stability. Considering the high working capacities, cyclic adsorption/desorption behaviors, and good hydrothermal stabilities, MIL-101(Cr), MIL-100(Cr), MIL-100(Al) and MIL-100(Fe)_150 are promising adsorbents for producing drinking water in dry regions with medium or high humidity conditions during the night.
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U2 - 10.1016/j.cej.2015.10.098
DO - 10.1016/j.cej.2015.10.098
M3 - Article
AN - SCOPUS:84947086948
VL - 286
SP - 467
EP - 475
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
ER -