One-Pot Synthesis of Al-P-O Catalysts and Their Catalytic Properties for <i>O</i>-Methylation of Catechol and Methanol
A series of Al-P-O catalysts (Al-<i>x</i>P-O) were prepared using a P123-assisted one-pot method at different P/Al molar ratios and used for <i>O</i>-methylation of catechol and methanol. The influences of the P/Al molar ratio and P123 addition on catalyst structure and surfa...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-10-01
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| Series: | Materials |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1944/14/20/5942 |
| Summary: | A series of Al-P-O catalysts (Al-<i>x</i>P-O) were prepared using a P123-assisted one-pot method at different P/Al molar ratios and used for <i>O</i>-methylation of catechol and methanol. The influences of the P/Al molar ratio and P123 addition on catalyst structure and surface acid-base characteristics were investigated in detail. Increasing the P/Al molar ratio more favored crystalline aluminophosphate. The P123-assisted Al<sup>3+</sup> and PO<sub>4</sub><sup>3−</sup> are known to be stabilized through weak steric force so that the formation of crystalline aluminophosphate could be inhibited at higher P/Al molar ratios. The results showed that the prepared Al-P-O catalysts possessed appropriate weak acid and weak base sites, which was beneficial to the reaction of catechol and methanol. The Al-1.1P-O catalyst synthesized with the assistance of P123 exhibited superior catalytic performances, with 52.5% catechol conversion and higher guaiacol selectivity of 97.6%. |
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| ISSN: | 1996-1944 |