TY - JOUR
T1 - Recent progress on water vapor adsorption equilibrium by metal-organic frameworks for heat transformation applications
AU - Ashraf, Sahrish
AU - Sultan, Muhammad
AU - Bahrami, Majid
AU - McCague, Claire
AU - Shahzad, Muhammad W.
AU - Amani, Mohammad
AU - Shamshiri, Redmond R.
AU - Ali, Hafiz Muhammad
N1 - This research was carried out with the financially supported of Bahauddin Zakariya University, Multan-Pakistan under the Director Research/ ORIC grant entitled “Investigation of agriculture based low-cost ad/sorbents for desiccant air-conditioning applications” awarded to Principal Investigator Dr. Muhammad Sultan. The 2nd Author (Dr. Muhammad Sultan) gratefully acknowledges the support from the Canadian Queen Elizabeth II Diamond Jubilee Scholarships (QES). The QES is managed through a unique partnership of Universities Canada, the Rideau Hall Foundation (RHF), Community Foundations of Canada (CFC), and Canadian universities.
PY - 2021/5/1
Y1 - 2021/5/1
N2 - Adsorption-based heat transformation systems are studied from the twentieth century; however, their performance is low to replace conventional systems. Metal-organic frameworks (MOFs) are providing a new class of micro- and nano-porous organic adsorbents. These have adjustable geometry/topology with a large surface area and pore volume. A comparison of the coefficient of performance (COP) between the MOFs and conventional adsorbents-based cooling systems is made for the years 1975–2020. Conventional adsorbents achieve COP of 0.85, whereas it is improved to 2.00 in the case of MOFs. The main bottleneck in the lower COP level is the low adsorption equilibrium amount. This study is aimed to provide comprehensive detail of water-vapor adsorption equilibrium and physicochemical properties of hydrophilic MOFs. Zn based MOFs are not stable in the presence of water-vapors, whereas MIL series, Zr, Ni, and Cu based MOFs are relatively more stable. Among the studied MOFs, MIL-101(Cr) possesses the highest adsorption uptake of 1.45 kg/kg at 25 °C (saturation condition) and outperformed for heat transformation applications. Its uptake can be increased to 1.60 kg/kg by coating with graphite oxide. For water desalination, MIL-53(Al) exhibits specific daily water production of 25.5 m3/ton.day (maximum) with a specific cooling power of 789.4 W/kg. Both MIL adsorbents are found promising which can be considered for various adsorption applications.
AB - Adsorption-based heat transformation systems are studied from the twentieth century; however, their performance is low to replace conventional systems. Metal-organic frameworks (MOFs) are providing a new class of micro- and nano-porous organic adsorbents. These have adjustable geometry/topology with a large surface area and pore volume. A comparison of the coefficient of performance (COP) between the MOFs and conventional adsorbents-based cooling systems is made for the years 1975–2020. Conventional adsorbents achieve COP of 0.85, whereas it is improved to 2.00 in the case of MOFs. The main bottleneck in the lower COP level is the low adsorption equilibrium amount. This study is aimed to provide comprehensive detail of water-vapor adsorption equilibrium and physicochemical properties of hydrophilic MOFs. Zn based MOFs are not stable in the presence of water-vapors, whereas MIL series, Zr, Ni, and Cu based MOFs are relatively more stable. Among the studied MOFs, MIL-101(Cr) possesses the highest adsorption uptake of 1.45 kg/kg at 25 °C (saturation condition) and outperformed for heat transformation applications. Its uptake can be increased to 1.60 kg/kg by coating with graphite oxide. For water desalination, MIL-53(Al) exhibits specific daily water production of 25.5 m3/ton.day (maximum) with a specific cooling power of 789.4 W/kg. Both MIL adsorbents are found promising which can be considered for various adsorption applications.
KW - Air-conditioning
KW - Cooling
KW - Desalination
KW - MOFs
KW - Water vapors adsorption equilibrium
UR - http://www.scopus.com/inward/record.url?scp=85105010744&partnerID=8YFLogxK
U2 - 10.1016/j.icheatmasstransfer.2021.105242
DO - 10.1016/j.icheatmasstransfer.2021.105242
M3 - Article
AN - SCOPUS:85105010744
SN - 0735-1933
VL - 124
JO - International Communications in Heat and Mass Transfer
JF - International Communications in Heat and Mass Transfer
M1 - 105242
ER -
