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A Universal Procedure for Crude Glycerol Purification from Different Feedstocks in Biodiesel Production: Experimental and Simulation Study
Industrial & Engineering Chemistry Research (2013)
  • Yang Xiao, Purdue University
  • Guomin Xiao, Southeast University, China
  • Arvind Varma, Purdue University
Abstract
It is important to utilize crude glycerol, the main byproduct of biodiesel production, to manufacture high value-added chemicals. Since crude glycerol typically contains less than 65 wt % glycerol, purification is the first step for its utilization. Owing to the wide variety of triglycerides, alcohols, catalysts, and separation processes used in biodiesel production, crude glycerol composition varies widely, leading to different crude glycerol purifications. In the present work, we develop a universal procedure for crude glycerol purification, including as key steps initial microfiltration of the crude glycerol, saponification, acidification, phase separation, and biphasic extraction of upper- and lower-layer products. The procedure was utilized to purify crude glycerol samples from two biodiesel production companies, experimentally upgrading both samples to >94 wt % purity. On an Aspen Plus software platform, the purification procedure was simulated using a process model based on two submodels to obtain a good match with the experiments. The developed procedure is suitable for the purification of crude glycerol obtained from different biodiesel production technologies.
Keywords
  • Glycerol purification,
  • universal method,
  • Process simulation
Publication Date
Fall September 8, 2013
DOI
10.1021/ie402003u
Citation Information
Yang Xiao, Guomin Xiao and Arvind Varma. "A Universal Procedure for Crude Glycerol Purification from Different Feedstocks in Biodiesel Production: Experimental and Simulation Study" Industrial & Engineering Chemistry Research Vol. 52 Iss. 39 (2013) p. 14291 - 14296 ISSN: 0888-5885
Available at: http://works.bepress.com/yang-xiao/7/