Methane Hydrate Formation in Hollow ZIF-8 Nanoparticles for Improved Methane Storage Capacity
Methane hydrate has been extensively studied as a potential medium for natural gas storage and transportation. Due to their high specific surface area, tunable porous structure, and surface chemistry, metal-organic frameworks are ideal materials to exhibit the catalytic effect for the formation proc...
| Published in: | Catalysts |
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| Main Authors: | , , |
| Format: | Report |
| Language: | English |
| Published: |
MDPI
2022
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| Subjects: | |
| Online Access: | http://ir.giec.ac.cn/handle/344007/36722 https://doi.org/10.3390/catal12050485 |
| Summary: | Methane hydrate has been extensively studied as a potential medium for natural gas storage and transportation. Due to their high specific surface area, tunable porous structure, and surface chemistry, metal-organic frameworks are ideal materials to exhibit the catalytic effect for the formation process of gas hydrate. In this paper, hollow ZIF-8 nanoparticles are synthesized using the hard template method. The synthesized hollow ZIF-8 nanoparticles are used in the adsorption and methane hydrate formation process. The effect of pre-adsorbed water mass in hollow ZIF-8 nanoparticles on methane storage capacity and the hydrate formation rate is investigated. The storage capacity of methane on wet, hollow ZIF-8 is augmented with an increase in the mass ratio of pre-adsorbed water and dry, hollow ZIF-8 (R-W), and the maximum adsorption capacity of methane on hollow ZIF-8 with a R-W of 1.2 can reach 20.72 mmol/g at 275 K and 8.57 MPa. With the decrease in R-W, the wet, hollow ZIF-8 exhibits a shortened induction time and an accelerated growth rate. The formation of methane hydrate on hollow ZIF-8 is further demonstrated with the enthalpy of the generation reaction. This work provides a promising alternative material for methane storage. |
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