Alkali-free zn–al layered double hydroxide catalysts for triglyceride transesterification
Zn–Al layered double hydroxides (LDHs) of general formula Al3+ x(OH)2]x+(CO3Zn–Al2−)x/2·yH2O are promising solid base catalysts for the transesterification of lipids to biofuels. However, conventional synthetic routes employ alkali ydroxide/carbonate precipitants which may contaminate the final LDH...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI
2018
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| Subjects: | |
| Online Access: | View Fulltext in Publisher View in Scopus |
| LEADER | 01827nam a2200277Ia 4500 | ||
|---|---|---|---|
| 001 | 10.3390-catal8120667 | ||
| 008 | 220120s2018 CNT 000 0 und d | ||
| 020 | |a 20734344 (ISSN) | ||
| 245 | 1 | 0 | |a Alkali-free zn–al layered double hydroxide catalysts for triglyceride transesterification |
| 260 | 0 | |b MDPI |c 2018 | |
| 490 | 1 | |t Catalysts | |
| 650 | 0 | 4 | |a Biodiesel |
| 650 | 0 | 4 | |a Layered double hydroxides |
| 650 | 0 | 4 | |a Solid base |
| 650 | 0 | 4 | |a Transesterification |
| 650 | 0 | 4 | |a Triglycerides |
| 856 | |z View Fulltext in Publisher |u https://doi.org/10.3390/catal8120667 | ||
| 856 | |z View in Scopus |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-85062421592&doi=10.3390%2fcatal8120667&partnerID=40&md5=9f28c517c32c180547fb74cd88e189d1 | ||
| 520 | 3 | |a Zn–Al layered double hydroxides (LDHs) of general formula Al3+ x(OH)2]x+(CO3Zn–Al2−)x/2·yH2O are promising solid base catalysts for the transesterification of lipids to biofuels. However, conventional synthetic routes employ alkali ydroxide/carbonate precipitants which may contaminate the final LDH catalyst and biofuel. The use of (NH3)2CO3 and NH3OH as precipitants affords alkali-free Zn–Al-LDHs spanning a wide composition range. The hydrothermal reconstruction of calcined Zn–Al-LDHs offers superior solid basicity and catalytic activity for the transesterification of C4–C18 triglycerides with methanol,compared with cold liquid phase or vapour phase reconstruction. Hydrothermally activated Zn3.3–Al-LDH was stable towards leaching during transesterification. © 2018 by the authors. Licensee MDPI, Basel, Switzerland. | |
| 700 | 1 | 0 | |a Isaacs, M.A. |e author |
| 700 | 1 | 0 | |a Lee, A.F. |e author |
| 700 | 1 | 0 | |a Manayil, J.C. |e author |
| 700 | 1 | 0 | |a Parlett, C.M.A. |e author |
| 700 | 1 | 0 | |a Tajuddin, N.A. |e author |
| 700 | 1 | 0 | |a Wilson, K. |e author |
| 773 | |t Catalysts | ||