Synergy Effects of Cobalt Oxides on Ni/Co-Embedded Al2O3 for Hydrogen-Rich Syngas Production by Steam Reforming of Propane
Abstract
:1. Introduction
2. Results
2.1. Physicochemical Properties of NCA Catalysts
2.2. Reduction Properties of NCA Catalysts and Catalytic Activities of CA Supports Themselves
2.3. Catalytic Activities of NCA Catalysts with Coke Analysis
2.4. Relative Compositions of Active Metal (Oxides) Measured by X-ray Absorption Fine Structure (XAFS) Analysis
3. Discussion and Conclusions
4. Materials and Methods
4.1. Catalyst Preparation and Activity Measurement
4.2. Characterization of the CA Supports as Well as NCA Catalysts
Supplementary Materials
Author Contributions
Funding
Conflicts of Interest
References
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Notation | XRF (wt%) | N2-Sorption 1 | XRD | CO Chemi. | ||||
---|---|---|---|---|---|---|---|---|
NiO | Co3O4 | Al2O3 | Sg (m2/g) | Pv (cm3/g) | Pd (nm) | Crystallite Size of Ni0 (Reduced/Used) (nm) | Dispersion (%) | |
NCA(0.5) | 10.9 | 64.3 | 24.8 | 32 | 0.24 | 25.2 | 14.6/16.2 | 1.0 |
NCA(1) | 10.6 | 50.6 | 38.8 | 46 | 0.36 | 27.6 | 9.2/12.9 | 2.4 |
NCA(2) | 10.3 | 36.1 | 53.6 | 64 | 0.39 | 20.5 | 6.9/8.7 | 2.5 |
NCA(3) | 11.9 | 28.4 | 59.7 | 78 | 0.43 | 15.3 | 6.3/7.4 | 3.6 |
NCA(4) | 11.2 | 22.6 | 66.2 | 111 | 0.48 | 12.9 | 6.5/7.3 | 3.0 |
Notation | Catalytic Performances 1 | |||
---|---|---|---|---|
Conversion (mol%) | Specific Rate [Moles of C3H8 Converted/(Moles of (Ni + Co)·h)] | Deactivation Rate (%/h) | Product Distribution (H2/CO/CO2/CH4) | |
NCA(0.5) | 73.2 | 0.96 | 0.89 | 71.2/8.6/15.8/4.4 |
NCA(1) | 78.1 | 1.20 | 0.31 | 70.1/9.0/15.7/5.2 |
NCA(2) | 72.6 | 1.37 | 0.27 | 73.2/8.5/16.3/2.0 |
NCA(3) | 66.5 | 1.30 | 0.28 | 72.5/7.6/16.8/3.1 |
NCA(4) | 49.5 | 1.10 | 0.23 | 73.4/10.6/14.1/1.9 |
Notation | Status | Linear Combination Fitting (LCF) Results by Using XANES Spectra | |||||||
---|---|---|---|---|---|---|---|---|---|
Ni | NiO | NiAl2O4 | R-Factor (%) | Co | CoO | CoAl2O4 | R-Factor (%) | ||
NCA(0.5) | Reduced | 0.78 | 0.12 | 0.11 | 0.2 | 0.82 | 0.07 | 0.11 | 0.3 |
Used | 0.55 | 0.17 | 0.28 | 0.9 | 0.69 | 0.07 | 0.25 | 0.2 | |
NCA(1) | Reduced | 0.57 | 0.26 | 0.16 | 1.0 | 0.73 | 0.08 | 0.20 | 0.1 |
Used | 0.49 | 0.20 | 0.32 | 0.2 | 0.53 | 0.10 | 0.37 | 0.2 | |
NCA(2) | Reduced | 0.44 | 0.20 | 0.36 | 0.3 | 0.68 | 0.10 | 0.22 | 0.6 |
Used | 0.27 | 0.27 | 0.47 | 0.2 | 0.52 | 0.11 | 0.37 | 0.8 | |
NCA(3) | Reduced | 0.33 | 0.18 | 0.49 | 0.6 | 0.42 | 0.13 | 0.45 | 0.4 |
Used | 0.25 | 0.23 | 0.52 | 0.1 | 0.21 | 0.08 | 0.70 | 1.4 | |
NCA(4) | Reduced | 0.21 | 0.22 | 0.57 | 0.4 | 0.40 | 0.12 | 0.48 | 0.5 |
Used | 0.15 | 0.25 | 0.60 | 0.2 | 0.13 | 0.17 | 0.70 | 1.0 |
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Park, K.S.; Jeong, M.H.; Bae, J.W. Synergy Effects of Cobalt Oxides on Ni/Co-Embedded Al2O3 for Hydrogen-Rich Syngas Production by Steam Reforming of Propane. Catalysts 2020, 10, 461. https://doi.org/10.3390/catal10040461
Park KS, Jeong MH, Bae JW. Synergy Effects of Cobalt Oxides on Ni/Co-Embedded Al2O3 for Hydrogen-Rich Syngas Production by Steam Reforming of Propane. Catalysts. 2020; 10(4):461. https://doi.org/10.3390/catal10040461
Chicago/Turabian StylePark, Kyung Soo, Min Hye Jeong, and Jong Wook Bae. 2020. "Synergy Effects of Cobalt Oxides on Ni/Co-Embedded Al2O3 for Hydrogen-Rich Syngas Production by Steam Reforming of Propane" Catalysts 10, no. 4: 461. https://doi.org/10.3390/catal10040461