Esterification of oleic acid and high acid content palm oil over an acid-activated bentonite catalyst
Source abstract
Abstract
Abstract The esterification of oleic acid with methanol and that of a high acid content palm or Jatropha oil with methanol or ethanol were evaluated with different acid-activated bentonite catalysts. Na-bentonite was acid-activated by either H2SO4 at varying concentrations from 0.25 to 2.0 M or with 0.5 M HNO3. The characterization of the raw and acid-activated bentonite was then conducted by nitrogen adsorption, XRD, XRF, SEM and acid–base titration analysis. The 0.5 M H2SO4 acid-activated bentonite exhibited the best catalytic activity with 100% methyl oleate yield and 99% free fatty acid conversion in the esterification of pure oleic acid and oleic acid in palm oil with methanol, respectively. Both conversions were higher than that obtained from esterification via commercial Amberlyst-15 catalyst.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Biodiesel Production and Applications · Enzyme Catalysis and Immobilization · Lubricants and Their Additives
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (29)
Show source-provided references
1. Acid-activated organoclays: preparation, characterisation and catalytic activity of polycation-treated bentonites10.1016/S0169-1317(98)00006-4 ↗
2. Hydrolysis of sucrose using sulfonated poly(vinyl alcohol) as catalyst10.1016/j.catcom.2008.03.036 ↗
3. Esterification of fatty acids to biodiesel over polymers with sulfonic acid groups10.1016/j.apcata.2009.02.028 ↗
4. Production of biodiesel by esterification of palmitic acid over mesoporous aluminosilicate Al-MCM-4110.1016/j.fuel.2008.10.007 ↗
5. Exhaust emissions from a diesel engine fuelled with transesterified waste olive oil10.1016/S0016-2361(03)00034-6 ↗
6. Bentonites, Geology, Mineralogy, Properties and Uses
7. Surface acidities and catalytic activities of acid-activated clays10.1016/j.molcata.2003.11.013 ↗
8. Acid activation of clay minerals
9. Alteration of smectites by treatments with hydrochloric acid and sodium carbonate solutions10.1016/0169-1317(90)90017-J ↗
10. Koono, S., Moriya, O., Noguchi, T., Okamura, H., 1993. EP patent 566,047.
11. The effect of rapeseed oil methyl ester on direct injection diesel engine performance and exhaust emissions10.1016/j.enconman.2005.09.003 ↗
12. Surface modification of clay minerals10.1016/S0169-1317(01)00063-1 ↗
13. Biodiesel production: a review10.1016/S0960-8524(99)00025-5 ↗
14. Organosulfonic acid-functionalized mesoporous silicas for the esterification of fatty acid10.1016/S0021-9517(03)00193-3 ↗
15. Biodiesel production from crude palm oil using sulfonic acid-modified mesostructured catalysts10.1016/j.cej.2009.12.037 ↗
16. Functionalized with propyl sulfonic acid groups used as catalyst in esterification reactions10.1016/j.clay.2010.11.018 ↗
17. Traditional and new applications for kaolin, smectite, and palygorskite: a general overview10.1016/S0169-1317(00)00016-8 ↗
18. Comparative study between catalysts for esterification prepared from kaolins10.1016/j.clay.2010.11.030 ↗
19. The effect of sulphuric acid activation on the crystallinity, surface area, porosity, surface acidity, and bleaching power of a bentonite10.1016/j.foodchem.2007.03.060 ↗
20. Mechanistic modeling of palmitic acid esterification via heterogeneous catalysis10.1021/ie100891n ↗
21. The effect of acid activation on some physicochemical properties of a bentonite
22. Biodiesel: an overview10.1590/S0103-50532005000800003 ↗
23. New sulfonic acid ion-exchange resins for the preesterification of different oils and fats with high content of free fatty acids10.1016/j.apcata.2009.04.019 ↗
24. Physico-chemical variation in bentonite by sulfuric acid activation
25. Fatty acids methyl esters from vegetable oil by means of ultrasonic energy10.1016/j.ultsonch.2004.04.001 ↗
26. The engine tests of biodiesel from used frying oil10.1080/00908310490473219 ↗
27. Raw alloysite as reusable heterogeneous catalyst for esterification of lauric acid10.1016/j.clay.2010.10.020 ↗
28. Degradation of poly(ethylene terephthalate)/clay nanocomposites during melt extrusion: effect of clay catalysis and chain extension10.1016/j.polymdegradstab.2008.09.009 ↗
29. Preparation of mesoporous polyoxometalate-tantalum pentoxide composite catalyst for efficient esterification of fatty acid10.1016/j.catcom.2008.01.005 ↗