Catalytic Hydrodechlorination of 4-Chlorophenol by Palladium-Based Catalyst Supported on Alumina and Graphene Materials
Abstract
:1. Introduction
2. Materials and Methods
2.1. Reagents
2.2. Synthesis of the Pd-Based Catalysts
2.2.1. Synthesis of the Powdered Pd/Al Catalyst
2.2.2. Synthesis of the Powdered Pd/GO and Pd/rGO Catalysts
2.2.3. Granulation of Pd/GO and Pd/rGO with Sand to Prepare the Pd/GOSC and Pd/rGOSC Composites
2.3. Characterization Methods
2.4. Catalytic Hydrodechlorination (HDC) Reaction for the Removal of 4-CP
2.4.1. HDC Reaction for the Removal of 4-CP Using Powdered Pd-Based Catalysts
2.4.2. Continuous HDC Process Using a Granulated Pd/rGOSC Composite for 4-CP Removal
3. Results and Discussion
3.1. Structural Properties of the Powdered Pd-Based Catalysts (Pd/Al, Pd/GO, and Pd/rGO)
3.2. Characterization of Granulated Pd/rGOSC
3.3. HDC of 4-Chlorophenol (4-CP) Using Pd/Al and Pd/rGO Catalysts
3.3.1. Effect of the Pd Load on the HDC of 4-CP
3.3.2. Effect of the Initial 4-CP Concentration on the HDC of 4-CP
3.3.3. Effect of the Catalyst Dosage on the HDC of 4-CP
3.3.4. Effect of pH on the HDC of 4-CP
3.3.5. Effect of the Catalyst Support Materials
3.4. Reusability of Pd/Al and Pd/rGO
3.5. HDC in a Continuous Reactor Using Granulated Pd/rGOSC
3.6. Proposed HDC Mechanisms Using Pd Catalysts for the Removal of 4-CP
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Catalyst (%) | Support Material | 4-CP Concentration | Catalyst Dosage | Temperature (°C) | k Value (min−1) | Ref |
---|---|---|---|---|---|---|
Pd (1%) | Pillared clay | 0.1 g/L | 1 g/L | 25 | 0.0141 | [27] |
Pd (1%) | Al2O3 | 0.2 g/L | 2 g/L | 200 | 0.088 | [36] |
Pd (1.5%) | rGO | 0.1 g/L | 0.33 g/L | 30 | 0.0564 | [45] |
Pd (0.5%) * | Al2O3 | 0.1 g/L | 3.25 g/L | 30 | 0.0167 | [69] |
Pd (1%) | Al | 0.1 g/L | 1 g/L | 25 | 0.0757 | This study |
Pd (5%) | Al rGO | 0.1 g/L 0.1 g/L | 1 g/L 0.1 g/L | 25 | 0.1352 2.3340 | This study |
B.E of Pd (II) 3d3/2 (eV) [% Area] | B.E of Pd (0) 3d3/2 (eV) [% Area] | B.E of Pd (II) 3d5/2 (eV) [% Area] | B.E of Pd (0) 3d5/2 (eV) [% Area] | Pdn+/Pd0 | |
---|---|---|---|---|---|
Fresh Pd/Al | 342.68 | 340.76 | 337.68 | 334.77 | 1.62 |
[22.15] | [13.70] | [32.01] | [19.80] | ||
Used Pd/Al | 342.19 | 339.98 | 337.04 | 334.71 | 0.70 |
[7.85] | [19.18] | [12.20] | [27.80] | ||
Fresh Pd/rGO | 341.48 [22.90] | 340.58 [15.06] | 337.18 [31.64] | 335.42 [30.39] | 1.20 |
Used Pd/rGO | 340.88 | 340.28 | 337.07 | 335.23 | 0.43 |
[13.06] | [28.48] | [16.77] | [41.69] | ||
Fresh Pd/rGOSC | 342.49 | 340.08 | 337.28 | 334.78 | 4.05 |
[24.73] | [14.64] | [55.48] | [5.20] | ||
Used Pd/rGOSC | 342.38 | 338.88 | 336.38 | 334.18 | 0.69 |
[21.26] | [21.44] | [19.70] | [37.61] |
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Jeon, J.; Park, Y.; Hwang, Y. Catalytic Hydrodechlorination of 4-Chlorophenol by Palladium-Based Catalyst Supported on Alumina and Graphene Materials. Nanomaterials 2023, 13, 1564. https://doi.org/10.3390/nano13091564
Jeon J, Park Y, Hwang Y. Catalytic Hydrodechlorination of 4-Chlorophenol by Palladium-Based Catalyst Supported on Alumina and Graphene Materials. Nanomaterials. 2023; 13(9):1564. https://doi.org/10.3390/nano13091564
Chicago/Turabian StyleJeon, Jintae, Yuri Park, and Yuhoon Hwang. 2023. "Catalytic Hydrodechlorination of 4-Chlorophenol by Palladium-Based Catalyst Supported on Alumina and Graphene Materials" Nanomaterials 13, no. 9: 1564. https://doi.org/10.3390/nano13091564