Selective Adsorption of CH4/N2 on Ni-based MOF/SBA-15 Composite Materials
Abstract
:1. Introduction
2. Materials and Methods
2.1. Synthesis of Spherical SBA-15
2.2. Synthesis of MOF-1/SBA-15
2.3. Synthesis of MOF-2/SBA-15
2.4. Characterization
2.5. Adsorption Performance
3. Results and Discussion
3.1. Scanning electron microscopy (SEM) Images
3.2. X-ray fluorescence (XRF) and Elemental Analysis
3.3. X-ray powder diffraction (XRD) Patterns
3.4. Fourier-transform infrared spectroscopy (FT-IR)
3.5. Nitrogen Adsorption–Desorption
3.6. High Pressure Adsorption Isotherm
3.7. Determination of Adsorption Selectivity Parameters
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Samples | Inorganic Component (wt %) | Organic Component (wt %) | ||||
---|---|---|---|---|---|---|
SiO2 | NiO | C | H | N | O | |
SBA-15 | 100 | - | - | - | - | - |
MOF-1/SBA-15 | 47.8 ± 0.07 | 14.0 ±0.02 | 21.5 ± 0.02 | 2.8 ± 0.005 | - | 13.9 ± 0.01 |
MOF-2/SBA-15 | 43.3 ±0.06 | 13.0 ±0.01 | 23.5 ± 0.03 | 2.8 ± 0.004 | 4.0 ± 0.003 | 13.4 ± 0.02 |
Samples | BET Surface Area (m2/g) | Average Pore Diameter (nm) | Total Pore Volume (cm3/g) |
---|---|---|---|
SBA-15 | 638 ± 9.6 | 3.0 ± 0.15 | 1.28 ± 0.09 |
MOF-1 | 26 ± 1.3 | 3.6 ± 0.08 | 0.25 ± 0.04 |
MOF-2 | 57 ± 2.1 | 4.2 ± 0.21 | 0.31 ± 0.03 |
MOF-1/SBA-15 | 43 ± 2.3 | 4.0 ± 0.33 | 0.53 ± 0.04 |
MOF-2/SBA-15 | 171 ± 3.5 | 3.1 ± 0.17 | 0.43 ± 0.02 |
Samples | CH4 Adsorption | N2 Adsorption | ||
---|---|---|---|---|
P/P0 | VCH4 (mL/g) | P/P0 | VN2 (mL/g) | |
SBA-15 | 0.49 | 0.87 | 0.50 | 0.45 |
0.70 | 1.24 | 0.70 | 0.62 | |
1.02 | 1.78 | 1.00 | 0.88 | |
1.29 | 2.24 | 1.32 | 1.15 | |
1.64 | 2.72 | 1.64 | 1.34 | |
MOF-1 | 0.57 | 0.20 | 0.56 | 0.17 |
0.71 | 0.26 | 0.76 | 0.20 | |
1.08 | 0.28 | 1.10 | 0.24 | |
1.25 | 0.32 | 1.27 | 0.27 | |
1.52 | 0.37 | 1.53 | 0.29 | |
MOF-2 | 0.55 | 1.42 | 0.51 | 0.30 |
0.71 | 1.54 | 0.76 | 0.38 | |
1.10 | 1.68 | 1.12 | 0.45 | |
1.26 | 1.72 | 1.28 | 0.50 | |
1.52 | 1.89 | 1.47 | 0.57 | |
MOF-1/SBA-15 | 0.51 | 0.09 | 0.49 | 0.04 |
0.72 | 0.14 | 0.71 | 0.06 | |
1.11 | 0.22 | 1.01 | 0.08 | |
1.27 | 0.23 | 1.29 | 0.11 | |
1.66 | 0.28 | 1.66 | 0.14 | |
MOF-2/SBA-15 | 0.50 | 0.65 | 0.50 | 0.19 |
0.69 | 0.92 | 0.71 | 0.27 | |
1.14 | 1.39 | 1.02 | 0.38 | |
1.33 | 1.69 | 1.23 | 0.46 | |
1.63 | 2.11 | 1.66 | 0.59 |
Samples | Adsorption Equilibrium Amount (mL/g) | |||
---|---|---|---|---|
At an Adsorption Pressure of 150 kPa | At a Desorption Pressure of 50 kPa | |||
VCH4 | VN2 | VCH4 | VN2 | |
SBA-15 | 2.56 | 1.30 | 1.23 | 0.58 |
MOF-1 | 0.35 | 0.29 | 0.21 | 0.18 |
MOF-2 | 1.82 | 0.54 | 0.49 | 0.41 |
MOF-1/SBA-15 | 0.28 | 0.13 | 0.15 | 0.07 |
MOF-2/SBA-15 | 1.89 | 0.55 | 0.90 | 0.24 |
Parameters related to the adsorption selectivity | ||||
αCH4/N2 | WCH4/N2 | SCH4/N2 | Reference | |
SBA-15 | 1.99 | 1.84 | 3.66 | |
MOF-1 | 1.12 | 1.39 | 1.56 | |
MOF-2 | 2.66 | 1.93 | 5.13 | |
MOF-1/SBA-15 | 2.17 | 2.19 | 4.75 | |
MOF-2/SBA-15 | 3.44 | 3.24 | 11.1 | |
MOF-5 | 1.13 | - | 0.67 | [46] |
MOF-177 | 4.00 | - | 8.45 | [46] |
Zeolite 5A | 0.94 | - | 0.81 | [46] |
Activated carbon | 4.60 | - | 4.02 | [47] |
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Liu, H.; Ding, W.; Lei, S.; Tian, X.; Zhou, F. Selective Adsorption of CH4/N2 on Ni-based MOF/SBA-15 Composite Materials. Nanomaterials 2019, 9, 149. https://doi.org/10.3390/nano9020149
Liu H, Ding W, Lei S, Tian X, Zhou F. Selective Adsorption of CH4/N2 on Ni-based MOF/SBA-15 Composite Materials. Nanomaterials. 2019; 9(2):149. https://doi.org/10.3390/nano9020149
Chicago/Turabian StyleLiu, Hong, Wei Ding, Shaohua Lei, Xupei Tian, and Fubao Zhou. 2019. "Selective Adsorption of CH4/N2 on Ni-based MOF/SBA-15 Composite Materials" Nanomaterials 9, no. 2: 149. https://doi.org/10.3390/nano9020149