Chiang Mai Journal of Science

Print ISSN: 0125-2526 | eISSN : 2465-3845

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Response Surface Methodology Based Optimized Purification of the Residual Glycerol from Biodiesel Production Process

Muhammad Danish*, Muhammad Waseem Mumtaz [a], Mahpara Fakhar [a] and Umer Rashid*
* Author for corresponding; e-mail address: drdanish62@gmail.com; umer.rashid@yahoo.com
Volume: Vol.44 No.4 (October 2017)
Research Article
DOI:
Received: 15 September 2015, Revised: -, Accepted: 15 December 2015, Published: -

Citation: Danish M., Mumtaz M.W., Fakhar M. and Rashid U., Response Surface Methodology Based Optimized Purification of the Residual Glycerol from Biodiesel Production Process, Chiang Mai Journal of Science, 2017; 44(4): 1570-1582.

Abstract

Biodiesel is gaining acceptance as an alternative source of energy, due to its important properties, renewability, less toxicity and environmentally friendly attributes. One of the constrains, associated with the use of biodiesel as fuel is its high price. The most promising way to make it cost effective is the purification and utilization of its by-product glycerol. During the refining of glycerol, the following sequence was followed: acidification, neutralization, solvent extraction and decolorization. Optimized conditions for getting a high yield refined product were attained using the response surface methodology (RSM) for different parameters such as pH 1; extraction temperature, 50 °C; extraction time, 40 min; activated carbon dose, 2.0 g and rate of shaking, 350 rpm. Furthermore, the refined glycerol was characterized such as density, 1.65g/cm3; specific gravity, 1.23; ash content, 1.06; refractive index, 1.05 and pH, 6.05.  Raman and FTIR spectroscopic methods were used for the monitoring of glycerol purification. 

Keywords: residual glycerol, purification, RSM, characterization

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