Ionothermal Crystallization of SAPO-11 using novel pyridinium ionic liquid and its catalytic activity in esterification of levulinic acid into ethyl levulinate
A study using a novel pyridinium ionic liquid, namely 1-propylpyridinium bromide (PPy]Br), to crystallize SAPO-11 under ionothermal conditions is reported. By carefully following the crystallization process, SAPO-11 can readily be crystallized in the presence of PPy]Br, which serves as a synthesis s...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Published: |
MDPI
2023
|
| Subjects: | |
| Online Access: | http://eprints.um.edu.my/38718/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Summary: | A study using a novel pyridinium ionic liquid, namely 1-propylpyridinium bromide (PPy]Br), to crystallize SAPO-11 under ionothermal conditions is reported. By carefully following the crystallization process, SAPO-11 can readily be crystallized in the presence of PPy]Br, which serves as a synthesis solvent and structure-directing agent, at 150 degrees C after 133 h of heating. The study also focuses on manipulating other synthesis parameters (e.g., crystallization temperature, phosphorous content, silicon amount and PPy]Br concentration) and investigating their respective effects on the formation of SAPO-11. The crystallized SAPO-11 has an acidic nature and a high surface area. Under conductive instant heating conditions, the SAPO-11 catalyst is very active in the conversion of levulinic acid into ethyl levulinate; 93.4% conversion and 100% selectivity of ethyl levulinate are recorded at 180 degrees C after 30 min of reaction. This result is comparable to or even better than those of conventional homogeneous catalysts. |
|---|