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Recovery of oil and free fatty acids from spent bleaching earth using sub-critical water technology supported with kinetic and thermodynamic study

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DOI: 10.4236/abb.2014.53033    5,460 Downloads   7,244 Views   Citations

ABSTRACT

This work represents the extraction of oil with high free fatty acid content from spent bleaching earth using sub-critical water technology as a greener production pathway. The extraction efficiencies under different conditions were investigated. The studied parameters include temperatures in the range of 180 to 270°C, the feed to solventfeed-to-solvent (in this case water) ratio (1:1, 1:2, 1:3, 1:4 and 1:5) and extraction times in the range of 5-60 minutes. The results showed that the optimum temperature, feed to solventfeed-to-solvent ratio, and extraction time were 270°C, 1:3, and 20 minutes, respectively. In another experiment, the extracted free fatty acids were converted into mono-, di-, and triglycerides through esterification with glycerol to increase the value added of the extracted products. The kinetics of the extraction process was found to be corresponding to an irreversible consecutive unimolecular-type first order reaction, consisting of the extraction step followed by the decomposition reaction step. Both reaction rates of extraction and decomposition were estimated using the reaction rate equations utilizing the nonlinear regression method. The apparent activation energy was calculated to be 46.1 kJ·mol-1. This result indicates a diffusion controlled reaction. For more exploration and deep understanding of the extraction mechanism, other thermodynamic parameters were also calculated and analyzed including,ΔH#, ΔS#, and ΔG# of the extraction step.


Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Fattah, R. , Mostafa, N. , Mahmoud, M. and Abdelmoez, W. (2014) Recovery of oil and free fatty acids from spent bleaching earth using sub-critical water technology supported with kinetic and thermodynamic study. Advances in Bioscience and Biotechnology, 5, 261-272. doi: 10.4236/abb.2014.53033.

References

[1] Pollard, S.J.T. (1990) Low-cost adsorbents from industrial wastes. Ph.D. Thesis, Imperial College, London.
[2] Environment Agency (EA) Guidance (2006) Guidance for waste destined for disposals in landfills, version 2, Interpretation of the waste acceptance requirements of the landfill (England and Wales) Regulations (as amended).
http://www.environment-agency.gov.uk/
[3] Ramadan, A.R., Kock, P. and Nadim, A. (2005) Nasreya: A treatment and disposal facility for industrial hazardous waste in Alexandria, Egypt: Phase I. Waste Management and Research, 23, 167-170.
http://dx.doi.org/10.1177/0734242X05053689
[4] Al-Zahrani, A.A. and Daous, M.A. (2000) Recycling of spent bleaching clay and oil recovery. Institution of Chemical Engineers Transactions, 78, 224-228.
[5] Chang, J.I., Tai, H.-S. and Huang T.-H. (2006) Regeneration of spent bleaching earth by lye-extraction. Environmental Progress, 25, 373-378.
[6] Park, E.Y., Sato, M. and Kojima, S. (2008) Lipase-catalyzed biodiesel production from waste activated bleaching earth as raw material in a pilot plant. Bioresource Technology, 99, 3130-3135.
http://dx.doi.org/10.1016/j.biortech.2007.05.059
[7] Pizarro, A.V.L. and Park, E.Y. (2003) Lipase-catalyzed production of biodiesel fuel from vegetable oils contained in waste activated bleaching earth. Process Biochemistry, 38, 1077-1082.
http://dx.doi.org/10.1016/S0032-9592(02)00241-8
[8] Loh, S.K., Cheng, S.F., Choo, Y.M. and Ma, A.N. (2006) A study of residual oils recovered from spent bleaching earth: Their characteristics and applications. American Journal of Applied Sciences, 3, 2063-2067.
http://dx.doi.org/10.3844/ajassp.2006.2063.2075
[9] Kiran, E., Debenedetti, P.G. and Peter, C.J. (2000) Supercitical fluids, fundamentals and applications. Kluwer Academic Publishers, Dordrecht, 425-437.
[10] Modell, M. (2001) SCWO Historical perspective supercritical water oxidation—Achievements and Challenges in Commercial Applications Strategic Analysis, Inc.
[11] Yoshida, H., Terashima, M. and Takahashi, Y. (1999) Production of organic acids and amino acids from fish meat by subcritical water hydrolysis. Biotechnology Progress, 15, 1090-1094.
http://dx.doi.org/10.1021/bp9900920
[12] Abdelmoez, W. and Yoshida, H. (2006) Synthesis of a novel protein-based biodegradable plastic from the BSA using the sub-critical water technology. AIChE Journal, 52, 2607-2616. http://dx.doi.org/10.1002/aic.10849
[13] Abdelmoez, W. and Yoshida, H. (2008) Kinetics and mechanism of the synthesis of novel protein-based plastic using subcritical water. Biotechnology Progress, 24, 466-475.
[14] Abdelmoez, W., Abdelfatah, R., Tayeb, A. and Yoshida, H. (2011) Extraction of cottonseed oil using subcritical water technology. AIChE Journal, 57, 2353-2359.
http://dx.doi.org/10.1002/aic.12454
[15] Abdelmoez, W., Abdelhamid, M. and Yoshida, H. (2012) Extraction of jojoba oil using subcritical water technology. Recent Patents on Chemical Engineering, 5, 63-70.
[16] Abdelmoez, W., Yoshida, H. and Nakahasi, T. (2010) Pathways of amino acid transformation and decomposition in saturated subcritical water conditions. International Journal of Chemical Reactor Engineering, 8, A107.
[17] Abdelmoez, W. and Yoshida, H. (2013) Production of amino and organic acids from proteins using sub-critical water technology. International Journal of Chemical Reactor Engineering, 11, 1-16.
[18] Mostafa, N., Maher, A. and Abdelmoez, W. (2013) Production of mono-, di-, and triglycerides from waste fatty acids through esterification with glycerol. Advances in Bioscience and Biotechnology, 4, 900-907.
http://dx.doi.org/10.4236/abb.2013.49118

  
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