材料科学
金属有机骨架
多孔性
天然气
空气分离
灵活性(工程)
化学工程
多孔介质
分离(统计)
气体分离
蒸馏
分离过程
工艺工程
复合材料
有机化学
吸附
计算机科学
化学
统计
机器学习
工程类
生物化学
膜
氧气
数学
作者
정민지,Parkjaewoo,Hyunchul Oh
出处
期刊:Korean Journal of Materials Research
[The Materials Research Society of Korea]
日期:2018-09-01
卷期号:28 (9): 506-510
标识
DOI:10.3740/mrsk.2018.28.9.506
摘要
Nitrogen is a serious contaminant in natural gas because it decreases the energy density. The natural gas specification in South Korea requires a N2 content of less than 1 mol%. Thus, cost-effective N2 removal technology from natural gas is necessary, but until now the only option has been energy-intensive processes, e.g., cryogenic distillation. Using porous materials for the removal process would be beneficial for an efficient separation of CH4/N2 mixtures, but this still remains one of the challenges in modern separation technology due to the very similar size of the components. Among various porous materials, metal-organic frameworks (MOFs) present a promising candidate for the potential CH4/N2 separation material due to their unique structural flexibility. A MIL-53(Al), the most well-known flexible metal-organic framework, creates dynamic changes with closed pore (cp) transitions to open pores (ops), also called the ‘breathing’ phenomenon. We demonstrate the separation performance of CH4/N2 mixtures of MIL-53(Al) and its derivative MIL-53-NH2. The CH4/N2 selectivity of MIL-53-NH2 is higher than pristine MIL-53(Al), suggesting a stronger CH4 interaction with NH2.
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