Synthesis of Me Doped Mg(OH)2 Materials for Thermochemical Heat Storage
Abstract
:1. Introduction
2. Materials and Methods
2.1. Samples Preparation
2.2. Samples Characterization
2.3. Thermochemical Performance
3. Results and Discussion
3.1. Me Doped Mg(OH)2 Preparation
3.2. Structure and Morphology of Samples
3.3. Thermochemical Behavior
4. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Sample Code | Type of Me2+ | [Me] | Me/Mg2+ Nominal Molar Ratio |
---|---|---|---|
MH | - | - | - |
MH-Ca1 | Ca2+ | 0.0003 | 0.033 |
MH-Ca2 | Ca2+ | 0.0007 | 0.067 |
MH-Ca3 | Ca2+ | 0.0020 | 0.200 |
MH-Ni1 | Ni2+ | 0.0003 | 0.033 |
MH-Ni2 | Ni2+ | 0.0007 | 0.067 |
MH-Ni3 | Ni2+ | 0.0020 | 0.200 |
MH-Co1 | Co2+ | 0.0003 | 0.033 |
MH-Co2 | Co2+ | 0.0007 | 0.067 |
MH-Co3 | Co2+ | 0.0020 | 0.200 |
Hydroxide | [Me2+] [OH−]n | Ksp (at 25 °C) | Supersaturation Condition |
---|---|---|---|
Mg(OH)2 | 3.98 × 10−7 | 1.80 × 10−11 | Y |
Ca(OH)2 | 1.33 × 10−8 | 7.90 × 10−06 | N |
Ca(OH)2 | 2.65 × 10−8 | 7.90 × 10−06 | N |
Ca(OH)2 | 7.96 × 10−8 | 7.90 × 10−06 | N |
Ni(OH)2 | 1.33 × 10−8 | 2.80 × 10−16 | Y |
Ni(OH)2 | 2.65 × 10−8 | 2.80 × 10−16 | Y |
Ni(OH)2 | 7.96 × 10−8 | 2.80 × 10−16 | Y |
Co(OH)2 | 1.33 × 10−8 | 2.50 × 10−16 | Y |
Co(OH)2 | 2.65 × 10−8 | 2.50 × 10−16 | Y |
Co(OH)2 | 7.96 × 10−8 | 2.50 × 10−16 | Y |
Entry | Sample Code | Intensity Ratios | Rietveld Refinement | Morphological Properties | |||
---|---|---|---|---|---|---|---|
I001/101 | I001/110 | V(Å3) | Mean Particle Size (nm) * | ρ (kg/m3) | Vpore (cm3/g) | ||
1 | MH | 0.78 | 2.63 | 40.9 | 180.5 ± 24.0 | 350 | 0.618 |
2 | MH-Ca1 | 1.16 | 3.64 | 40.7 | 78.9 ± 44.5 | 685 | 0.614 |
3 | MH-Ca2 | 1.34 | 4.77 | 40.8 | 131.3 ± 33.1 | 644 | 0.497 |
4 | MH-Ca3 | 1.04 | 3.57 | 41.3 | 117.1 ± 45.6 | 740 | 0.525 |
5 | MH-Ni1 | 1.09 | 3.26 | 40.8 | 97.8 ± 50.1 | 752 | 0.885 |
6 | MH-Ni2 | 0.97 | 3.19 | 41.3 | 105.8 ± 38.1 | 712 | 0.478 |
7 | MH-Ni3 | 0.95 | 3.26 | 41.0 | 118.4 ± 20.6 | 663 | 0.515 |
8 | MH-Co1 | 0.89 | 2.36 | 40.4 | 85.8 ± 34.0 | 616 | 0.778 |
9 | MH-Co2 | 0.72 | 1.69 | 40.9 | 67.1 ± 40.0 | 587 | 0.914 |
10 | MH-Co3 | 1.85 | 4.84 | 41.5 | 188.6 ± 23.4 | 1.050 | 0.245 |
Entry | Sample Code | 1st Cycle | 3rd Cyle | QsV (MJ/m3) | QsV (MJ/m3) | ||
---|---|---|---|---|---|---|---|
βd (%) | βh (%) | βd (%) | βh (%) | ||||
1 | MH | 89.0 | 61.6 | 58.8 | 58.0 | 285.4 | 281.95 |
2 | MH-Ca1 | 90.0 | 62.7 | 58.8 | 54.0 | 536.4 | 513.98 |
3 | MH-Ca2 | 90.0 | 52.7 | 49.4 | 45.6 | 444.9 | 408.44 |
4 | MH-Ca3 | 88.3 | 55.8 | 51.2 | 45.6 | 525.7 | 475.5 |
5 | MH-Ni1 | 93.7 | 36.6 | 38.2 | 38.0 | 401.7 | 397.01 |
6 | MH-Ni2 | 97.7 | 42.0 | 44.4 | 49.0 | 441.0 | 485.01 |
7 | MH-Ni3 | 94.8 | 41.1 | 44.4 | 49.0 | 407.0 | 449.36 |
8 | MH-Co1 | 89.0 | 55.5 | 52.5 | 48.6 | 450.6 | 416.22 |
9 | MH-Co2 | 89.0 | 56.6 | 56.8 | 57.2 | 463.3 | 466.98 |
10 | MH-Co3 | 87.2 | 55.5 | 49.7 | 43.8 | 724.8 | 640.75 |
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Piperopoulos, E.; Fazio, M.; Mastronardo, E. Synthesis of Me Doped Mg(OH)2 Materials for Thermochemical Heat Storage. Nanomaterials 2018, 8, 573. https://doi.org/10.3390/nano8080573
Piperopoulos E, Fazio M, Mastronardo E. Synthesis of Me Doped Mg(OH)2 Materials for Thermochemical Heat Storage. Nanomaterials. 2018; 8(8):573. https://doi.org/10.3390/nano8080573
Chicago/Turabian StylePiperopoulos, Elpida, Marianna Fazio, and Emanuela Mastronardo. 2018. "Synthesis of Me Doped Mg(OH)2 Materials for Thermochemical Heat Storage" Nanomaterials 8, no. 8: 573. https://doi.org/10.3390/nano8080573