Synthesis of Highly Selective and Stable Co-Cr/SAPO-34 Catalyst for the Catalytic Dehydration of Ethanol to Ethylene
Abstract
:1. Introduction
2. Results
2.1. XRD Anaysis
2.2. SEM Analysis
2.3. EDX Analysis
2.4. FT-IR Analysis
2.5. NH3-TPD Analysis
2.6. BET Analysis
2.7. Coke Formation
3. Activity Tests of Catalysts
4. Materials and Methods
4.1. Material
4.2. Catalyst Preparation
4.3. Characterization of Catalysts
4.4. Catalytic Reaction
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Samples | Total Acidity/(mmol/g) | Percentage of Acid Sites (% of Total Acid) | |
---|---|---|---|
Weak Acid | Strong Acid | ||
SAPO-34 | 0.77 | 73 | 27 |
Cr/SAPO-34 | 0.65 | 69 | 31 |
Co-Cr/SAPO-34 | 0.67 | 55 | 45 |
Catalysts | SBET (m2/g) | Vtotal (cm3/g) | Dpore (nm) |
---|---|---|---|
SAPO-34 | 483 | 0.57 | 2.35 |
Cr/SAPO-34 | 517 | 0.41 | 1.64 |
Co-Cr/SAPO-34 | 563 | 0.48 | 1.70 |
Catalyst | Reaction Temperature (°C) | Ethanol Conversion (%) | Ethylene Selectivity (%) | Reference |
---|---|---|---|---|
HZSM-5 | 400 | 99 | 10 | [39] |
Co/HZSM-5 | 400 | 94.82 | 76.16 | [40] |
Cr/HZSM-5 | 400 | 93.85 | 23.81 | [40] |
SAPO-34@ZSM-5 | 400 | 84.5 | 65 | [38] |
Mn/SAPO-34 | 340 | 99.35 | 98.44 | [6] |
SAPO-34 | 400 | 92.3 | 51.8 | This work |
Cr/SAPO-34 | 400 | 97.6 | 98.2 | This work |
Co-Cr/SAPO-34 | 400 | 99.3 | 99.4 | This work |
NO. | RT (min) | Name of Compound | Molecular Formula | Structural Formula | Similarity (%) |
---|---|---|---|---|---|
1 | 12.017 | Decane, 2,3,5-trimethyl- | C13H28 | | 72 |
2 | 12.778 | Undecane, 4-methyl- | C12H26 | | 68 |
3 | 14.406 | Decane, 2,4,6-trimethyl- | C13H28 | | 47 |
4 | 14.65 | Benzaldehyde, 3,5-dimethyl- | C9H10O | | 95 |
5 | 15.064 | Octane, 2,4,6-trimethyl- | C11H24 | | 53 |
6 | 15.271 | Undecane, 2,4-dimethyl- | C13H28 | | 59 |
7 | 15.509 | Hexadecane | C16H34 | | 72 |
8 | 18.252 | Dihydrocoumarin, 4,4,5,7,8-pentamethyl | C13H16O2 | | 64 |
9 | 18.575 | 2,4-Di-tert-butylphenol | C14H22O | | 96 |
10 | 18.794 | Dodecane, 3-methyl- | C13H28 | | 72 |
11 | 20.708 | Heptadecane | C17H36 | | 97 |
12 | 22.75 | Octadecane | C18H38 | | 93 |
13 | 25.713 | Cyclohexadecane | C16H32 | | 93 |
14 | 27.913 | Phenol, 2,2′-methylenebis(6-(1,1-dimethylethyl)-4-methyl- | C21H28O2 | | 91 |
NO. | RT (min) | Name of Compound | Molecular Formula | Structural Formula | Similarity (%) |
---|---|---|---|---|---|
1 | 3.361 | Butanoic acid, 2-methylpropyl ester | C8H16O2 | | 72 |
2 | 6.726 | Thymol, TMS derivative | C10H14O | | 50 |
3 | 18.362 | 2,6-Dihydroxyacetophenone, 2TMS derivative | C8H8O3 | | 50 |
4 | 22.348 | Cyclopentadecanone, 2-hydroxy- | C15H28O2 | | 97 |
5 | 27.895 | Phenol, 2,2′-methylenebis(6-(1,1-dimethylethyl)-4-methyl- | C23H32O2 | | 90 |
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Niu, P.; Ren, X.; Xiong, D.; Ding, S.; Li, Y.; Wei, Z.; Chen, X. Synthesis of Highly Selective and Stable Co-Cr/SAPO-34 Catalyst for the Catalytic Dehydration of Ethanol to Ethylene. Catalysts 2020, 10, 785. https://doi.org/10.3390/catal10070785
Niu P, Ren X, Xiong D, Ding S, Li Y, Wei Z, Chen X. Synthesis of Highly Selective and Stable Co-Cr/SAPO-34 Catalyst for the Catalytic Dehydration of Ethanol to Ethylene. Catalysts. 2020; 10(7):785. https://doi.org/10.3390/catal10070785
Chicago/Turabian StyleNiu, Peirong, Xiao Ren, Deyuan Xiong, Shilei Ding, Yuanlin Li, Zhaozhou Wei, and Xusong Chen. 2020. "Synthesis of Highly Selective and Stable Co-Cr/SAPO-34 Catalyst for the Catalytic Dehydration of Ethanol to Ethylene" Catalysts 10, no. 7: 785. https://doi.org/10.3390/catal10070785