Abstract
Ni-MOF-74 was prepared by microwave heating and coated with polydimethylsiloxane (PDMS) via vapor deposition. Both the pristine and the PDMS-coated Ni-MOF-74 samples were exposed to moisture in air (relative humidity of 75%) for different periods of time, and their methane storage capacities under 35 bar conditions were measured. The pristine sample had a Brunauer-Emmett-Teller (SBET) surface area of 1,050 m2·g−1, with a CH4 uptake capacity of 113.8 mg·g−1 at 300 K and 35 bar. After exposure to moisture for seven days, the BET surface area and CH4 uptake capacity declined drastically, whereas the PDMS-coated sample maintained its original BET surface area (1,018 m2·g−1) and CH4 uptake capacity (107.7 mg·g−1). After exposure to moisture in air for 30 days, however, even the PDMS-coated sample lost almost 60% of its CH4 storage capacity. All the methane storage capacity data were linearly correlated with the BET surface areas of the Ni-MOF 74 samples.
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Lee, YR., Cho, SM. & Ahn, WS. Effects of polydimethylsiloxane coating of Ni-MOF-74 on CH4 storage. Korean J. Chem. Eng. 35, 1542–1546 (2018). https://doi.org/10.1007/s11814-018-0049-1
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DOI: https://doi.org/10.1007/s11814-018-0049-1