Tuning of Particle Size of Zeolitic Imidazolate Framework-7 via Rapid Synthesis Duration for CH4 Adsorption

被引:0
|
作者
Chai, Li-Xing [1 ]
Abd Rahman, Alia Syuhada [1 ,2 ]
Yeong, Yin Fong [1 ,2 ]
机构
[1] Univ Teknol PETRONAS, Dept Chem Engn, Seri Iskandar 32610, Perak, Malaysia
[2] Univ Teknol PETRONAS, Inst Sustainable Energy & Resources, Ctr Carbon Capture Utilizat & Storage CCCUS, Seri Iskandar 32610, Perak, Malaysia
来源
JOURNAL OF COMPOSITES SCIENCE | 2024年 / 8卷 / 10期
关键词
ZIF-7; CH4; adsorption; synthesis; characterization; adsorption isotherm; METAL-ORGANIC FRAMEWORKS; ZIF-7; CO2;
D O I
10.3390/jcs8100400
中图分类号
TB33 [复合材料];
学科分类号
摘要
In this work, zeolite imidazolate framework-7 (ZIF-7) nanoparticles are synthesized via a solvothermal method and rapid synthesis durations of 1 h and 3 h. The effect of the synthesis duration on the structural properties of ZIF-7 was characterized by XRD and FESEM analyses. Subsequently, CH4 single gas adsorption over ZIF-7 nanoparticles was examined using the volumetric method at room temperature and pressure ranging from 2 to 9 bar. The results showed that the synthesized ZIF-7 adsorbents were highly crystalline with a well-defined and homogeneous particle size distribution of 50-60 nm. It was found that increasing the synthesis duration from 1 h to 3 h did not amend the structure and morphology of the resultant samples significantly, mainly due to the short synthesis duration. Meanwhile, the CH4 adsorbed by ZIF-7 nanoparticles increased with rising pressure for both samples, and the ZIF-7 nanoparticles synthesized at 3 h showed a greater adsorption capacity than that of 1 h, mainly due to its higher crystallinity and well-developed pore structure. The ZIF-7 synthesized at 3 h demonstrated an adsorption capacity up to 2.2 mol/kg, which was higher than those values reported in the literature for micron-sized ZIF-7 samples. The CH4 gas adsorption behavior of ZIF-7 nanoparticles synthesized at 1 h and 3 h were well predicted by the Langmuir isotherm model, with coefficients of determination, R2, of 0.9994 and 0.9982, respectively.
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页数:10
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