Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics Reaction
Abstract
:1. Introduction
2. Results and Discussions
2.1. Sample Characterizations
2.2. Catalytic Performance in Methanol to Aromatics (MTA) Reaction
3. Materials and Methods
3.1. Catalyst Preparation
3.1.1. The Preparation of ZSM-5 Zeolites via Dry Gel Conversion (DGC)
3.1.2. The Preparation of Hierarchical ZSM-5 Zeolites via the Destructive Method
3.1.3. The Preparation of Zn-Modified or Zn-P Co-Modified Hierarchical ZSM-5 Zeolites via Impregnation Method
3.2. Characterization
3.3. MTA Catalytic Tests
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Conflicts of Interest
References
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Relative Crystallinity | SBET a | Smicro b | Smeso c | Vtotal b | Vmicro b | Vmeso d | |
---|---|---|---|---|---|---|---|
(%) | (m2/g) | (m2/g) | (m2/g) | (cm3/g) | (cm3/g) | (cm3/g) | |
ZSM-5 | 100% | 262 | 206 | 56 | 0.182 | 0.108 | 0.079 |
HZSM-5 | 49.9 | 311 | 167 | 144 | 0.311 | 0.088 | 0.244 |
0.5Zn/HZSM-5 | 52.1 | 297 | 164 | 133 | 0.302 | 0.086 | 0.238 |
1.0Zn/HZSM-5 | 52.5 | 289 | 160 | 129 | 0.293 | 0.084 | 0.229 |
1.5Zn/HZSM-5 | 54.8 | 282 | 154 | 128 | 0.294 | 0.081 | 0.235 |
2.0Zn/HZSM-5 | 52.2 | 271 | 154 | 117 | 0.280 | 0.081 | 0.219 |
1.5Zn0.1P/HZSM-5 | 50.5 | 299 | 144 | 155 | 0.312 | 0.076 | 0.258 |
1.5Zn0.3P/HZSM-5 | 49.5 | 314 | 159 | 155 | 0.321 | 0.084 | 0.259 |
1.5Zn0.6P/HZSM-5 | 49.5 | 332 | 167 | 163 | 0.329 | 0.088 | 0.262 |
1.5Zn1.0P/HZSM-5 | 32.2 | 363 | 169 | 194 | 0.348 | 0.089 | 0.277 |
Samples | Py-IR (μmol/g) | NH3-TPD (μmol/g) | |||||
---|---|---|---|---|---|---|---|
Brønsted a | Lewis a | L/B b | Total c | Strong d | Medium d | Weak d | |
HZSM-5 | 262 | 114 | 0.44 | 761.6 | 212.7 | 174.3 | 374.7 |
0.5Zn/HZSM-5 | 246 | 204 | 0.83 | 807.1 | 180.9 | 223.8 | 402.4 |
1.0Zn/HZSM-5 | 164 | 222 | 1.35 | 799.3 | 173.5 | 240.1 | 385.7 |
1.5Zn/HZSM-5 | 161 | 252 | 1.57 | 816.5 | 177.3 | 245.2 | 394.0 |
2.0Zn/HZSM-5 | 159 | 278 | 1.75 | 818 | 152.6 | 257.9 | 407.5 |
1.5Zn0.1P/HZSM-5 | 153 | 303 | 1.98 | 834.3 | 173.3 | 254.3 | 406.7 |
1.5Zn0.3P/HZSM-5 | 146 | 319 | 2.19 | 966.2 | 244.9 | 266.2 | 455 |
1.5Zn0.6P/HZSM-5 | 141 | 300 | 2.13 | 846.2 | 180.4 | 223.4 | 442.4 |
1.5Zn1.0P/HZSM-5 | 134 | 284 | 2.12 | 782.7 | 175.1 | 208.9 | 398.7 |
Sample | B (%) | T (%) | X (%) | BTX (%) | C9+ (%) | Aromatics (%) |
---|---|---|---|---|---|---|
ZSM-5 | 1.01 | 6.41 | 13.17 | 20.59 | 8.82 | 29.41 |
HZSM-5 | 0.25 | 3.59 | 14.19 | 18.03 | 12.53 | 30.56 |
0.5Zn/HZSM-5 | 0.36 | 4.72 | 14.75 | 19.83 | 13.02 | 32.85 |
1.0Zn/HZSM-5 | 0.32 | 5.17 | 16.57 | 22.06 | 14.49 | 36.55 |
1.5Zn/HZSM-5 | 0.39 | 5.84 | 19.17 | 25.40 | 15.11 | 40.51 |
2.0Zn/HZSM-5 | 0.29 | 4.75 | 15.15 | 20.19 | 13.04 | 33.23 |
1.5Zn0.1P/HZSM-5 | 0.47 | 6.03 | 19.15 | 25.65 | 15.04 | 40.69 |
1.5Zn0.3P/HZSM-5 | 0.53 | 6.62 | 20.97 | 28.12 | 13.76 | 41.88 |
1.5Zn0.6P/HZSM-5 | 0.49 | 5.56 | 19.61 | 25.66 | 11.97 | 37.63 |
1.5Zn1.0P/HZSM-5 | 0.50 | 5.87 | 18.62 | 24.99 | 9.13 | 34.12 |
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Wang, Y.; Li, Z.; Dai, C.; Du, N.; Li, T.; Wang, R.; Peng, P.; Sun, H. Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics Reaction. Catalysts 2021, 11, 1388. https://0-doi-org.brum.beds.ac.uk/10.3390/catal11111388
Wang Y, Li Z, Dai C, Du N, Li T, Wang R, Peng P, Sun H. Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics Reaction. Catalysts. 2021; 11(11):1388. https://0-doi-org.brum.beds.ac.uk/10.3390/catal11111388
Chicago/Turabian StyleWang, Youhe, Zhihong Li, Chang Dai, Ningning Du, Tingting Li, Risheng Wang, Peng Peng, and Hongman Sun. 2021. "Zn-P Co-Modified Hierarchical ZSM-5 Zeolites Directly Synthesized via Dry Gel Conversion for Enhanced Methanol to Aromatics Reaction" Catalysts 11, no. 11: 1388. https://0-doi-org.brum.beds.ac.uk/10.3390/catal11111388