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Study of High-Aluminum-Content Sulfated Zirconia: Influence of Aluminum Content and Washing
Study of High-Aluminum-Content Sulfated Zirconia: Influence of Aluminum Content and Washing
- Source :
- Industrial & Engineering Chemistry Research. 56:5598-5606
- Publication Year :
- 2017
- Publisher :
- American Chemical Society (ACS), 2017.
-
Abstract
- A high-aluminum-content sulfated zirconia was prepared by the kneading method, and the washing process was considered as a key factor. Catalysts were characterized by XRD, BET analysis, SEM, TG, FT-IR spectroscopy, pyridine IR spectroscopy, NH3 TPD, H2 TPR, and 27Al NMR spectroscopy, and the reactivity was evaluated by n-hexane isomerization. The results showed that the high-aluminum-content sulfated zirconia has a high activity after being washed with water. Moreover, the aluminum content was found to strongly influence the crystal form, catalyst structure, and acidity, as well as the anchoring effect on the labile sulfates. Actually, the higher the aluminum content was, the more sulfates were left in the catalyst samples after washing. The O—H and S═O stretching vibrations were shifted in the presence of aluminum or water. With the support of the aluminum coordination state, a hydrolysis model was deduced for different aluminum contents in the catalysts, and it can explain the formation of more Bronsted...
- Subjects :
- inorganic chemicals
010405 organic chemistry
General Chemical Engineering
Inorganic chemistry
Infrared spectroscopy
General Chemistry
Nuclear magnetic resonance spectroscopy
010402 general chemistry
complex mixtures
01 natural sciences
Industrial and Manufacturing Engineering
0104 chemical sciences
Catalysis
chemistry.chemical_compound
chemistry
Pyridine
Reactivity (chemistry)
Cubic zirconia
Isomerization
BET theory
Subjects
Details
- ISSN :
- 15205045 and 08885885
- Volume :
- 56
- Database :
- OpenAIRE
- Journal :
- Industrial & Engineering Chemistry Research
- Accession number :
- edsair.doi...........ebe1989b95d2fa15b450db7fb965ca12
- Full Text :
- https://doi.org/10.1021/acs.iecr.7b00832