Esterification of Ethanol and Maleic Acid in Packed Bed Reactor Catalyzed by Sulfonic Acid Functionalized Silica (SAFS)
This research work was carried out to develop optimum continuous process for the esterification of ethanol with maleic acid by using surface modified sulfonic acid functionalized silica catalyst in a packed bed glass reactor (3 cm ID and 46 cm height) at 80 °C. Optimization of weight of catalyst (gm) and feed flow rate (ml/min) was carried out by using Response Surface Methodology (RSM)—Central Composite Design (CCD). The consistency of statistical model developed by CCD was verified using analysis of variance (ANOVA). The optimum condition for the conversion of maleic acid was 26.42 gm catalyst weight and 3.11 ml/min feed flow rate. The predicted conversion and actual conversion of maleic acid was found to be 47.83 and 46.89 % respectively under the 95 % confidence level of ±0.22. Comparing the conventional batch reactor with packed bed reactor at optimized condition implies that required amount of catalyst per gm of maleic acid is less in PBR. The results obtained shows that the RSM-CCD is adaptable for the maleic acid conversion of current esterification study.
KeywordsSAFS Esterification Maleic acid Central composite design
Authors are thankful to TEQIP-II, funded by Ministry of HRD, Govt. of INDIA, New Delhi for the financial support.
- Adam, F., Batagarawa, M.S., Hello, K.M., Al-Juaid, S.S.: One-step synthesis of solid sulfonic acid catalyst and its application in the acetalization of glycerol: crystal structure of cis-5-hydroxy-2-phenyl-1-3-dioxane trimer. Chem. Pap. 66–1048 (2012)Google Scholar
- Atghia, S.V., Beigbaghlou, S.S.: Nanocrystalline titania-based sulfonic acid (TiO2-Pr-SO3H) as a new, highly efficient, and recyclable solid acid catalyst for preparation of quinoxaline derivatives. J. Nanostruct. Chem. 3(38), 1 (2013)Google Scholar
- Aziz, H.A., Kamaruddin, A.H., Bakar, M.Z.A.: Process optimization studies on solvent extraction with naphthalene-2-boronic acid ion-pairing with trioctylmethylammonium chloride in sugar purification using design of experiments. Separ. Purif. Technol. 60(2), 190 (2008)Google Scholar
- Baura, S., Dutta, N., Karmarkar, S., Chattopadhyay, P., Aidew, L., Buragohain, A.K., Karak, N.: Biocompatible high performance hyperbranched epoxy/clay nanocomposite as an implantable material. Biomed. Mater. 9, 1 (2014)Google Scholar
- Chang, B., Fu, J., Tian, Y., Dong, X.: Soft-template synthesis of sulfonated mesoporous carbon with high catalytic activity for biodiesel production. RSC Adv. 3, 187 (2013)Google Scholar
- Hass, M.J., Michalski, P., Runyon, S., Nunez, A., Scott, K.M.: Production of FAME from acid oil, a by-product of vegetable oil refining. J. Am. Oil Chem. Soc. 80(1), 97 (2003)Google Scholar
- Shah, K.A., Parikh, J.K., Maheria, K.C.: Use of sulfonic acid-functionalized silica as catalyst for esterification of free fatty acids (FFA) in acid oil for biodiesel production: an optimization study. Res. Chem. Intermed. (2013). doi: 10.1007/s11164-013-1253-6
- Vijaykumar, B., Mahadevaiah, N., Nagendrappa, G., Jai Prakash, B.S.: Esterification of stearic acid with p-cresol over modified Indian bentonite clay catalyst. J. Porous Mater. 19, 201 (2012)Google Scholar
- Zhang, Y., Dube, M.A., McLean, D.D., Kates, M.: Biodiesel production from waste cooking oil: 2 Economic assessment and sensitivity analysis. Bioresour. Technol. 90(3), 229 (2003)Google Scholar