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Computational design of tetrazolate-based metal-organic frameworks for CH4 storage
Xuanjun Wu1, Liang Peng, Sichen Xiang
1School of Chemistry, Chemical Engineering & Life Sciences, Wuhan University of Technology, Wuhan 430070, P. R. China. wuxuanjun@whut.edu.cn.
Physical Chemistry Chemical Physics : PCCP
|October 26, 2018
Summary
New metal-organic frameworks (MOFs) using tetrazolate blocks show enhanced methane (CH4) storage. These materials offer improved CH4 deliverable capacity for cleaner energy applications.
Area of Science:
- Materials Science
- Chemical Engineering
- Computational Chemistry
Background:
- Methane (CH4) is a key clean energy source, driving demand for efficient storage materials.
- Metal-organic frameworks (MOFs) are promising porous materials for gas storage applications.
Purpose of the Study:
- To computationally design and evaluate tetrazolate-based MOFs for enhanced methane (CH4) storage capacity.
- To investigate the impact of tetrazolate functional groups on CH4 adsorption and delivery within MOFs.
Main Methods:
- Design and computational screening of 424 tetrazolate-based MOFs with diverse topological nets.
- Molecular simulations to predict CH4 deliverable volumetric capacities and adsorption isotherms at various pressures and temperatures (298 K).
Main Results:
- Tetrazolate blocks adjacent to pyrene or dibenzene linkers in fcu topological MOFs significantly enhance CH4 deliverable volumetric capacity.
- Zr-fcu-MOF-2Py demonstrated the highest CH4 deliverable capacity (177 cm3 (STP)/cm-3) among studied tetrazolate-based MOFs.
- Incorporation of tetrazolate links improved CH4 packing and delivery compared to carboxylate-based MOFs.
Conclusions:
- Tetrazolate-based MOFs offer a novel strategy for significantly improving methane storage performance.
- Tuning the chemical environment of MOFs with polar functional groups like tetrazolates is effective for enhancing CH4 volumetric delivery capacity.
- These findings pave the way for developing advanced materials for efficient and safe methane storage.
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