Fuel and Chemical Production from Glycerol, a Biodiesel Waste Product

Abstract

The esterification of waste glycerol from biodiesel production (WG) ore pure glycerol (PG) with Sylfat 2 were made by catalyst 3% titanium alcoholate (TiAl) for 3 h at 150°C. The quantity of glycerol in WG and the oleic acid (OA) in Sylfat 2 were made with UV-VIS spectra. There UV-VIS and FTIR spectra were shown. Some quantity of free acids was neutralized with methylamine ore with 25% water solution of NH 3 and was given FTIR spectra of obtained products. All investigations for characteristics of these products were made with standard method by four ball machine. From WG ore PG and Sylfat 2 were obtained the valuable friction modifiers, comparable with standard compounds.

Microbial Conversion of Waste Glycerol from Biodiesel Production into Value-Added Products

“…As the result of co-digestion, useful products like biogas (consisting mainly CH 4 and CO 2 ) are produced. Direct utilization of waste glycerol without pretreatment could be problematic to microbes because of its alkalinity and high salt levels [134]. The application of pretreated waste glycerol has been reported as a positive supplement to increase the productivity of anaerobic digestion.…”

Optimal experimental conditions for hydrogen production using low voltage electrooxidation of organic wastewater feedstock

“…These alcohol groups will be prevalent in the carbohydrates of domestic wastewater which typically contains w50% proteins, 40% carbohydrates and 10% fats and oils [36]. In many industrial wastewater streams significantly greater concentrations of these groups are present such as those from the biodiesel industry which generates an aqueous glycerol and methanol mixture as a byproduct [37]. Our observations are consistent with a recent report showing that, for the alcohols tested using a Pt anode in alkaline conditions; glycerol and methanol had the highest electrooxidation current densities [38].…”

125th Anniversary Review: Fuel Alcohol: Current Production and Future Challenges

“…Glycerol is a major co-product of biodiesel production which has the potential to be converted to ethanol by certain bacteria and yeasts (e.g., Candida magnoliae, Zygosaccharomyces rouxii and Pachysolen tannophilus -see 32,133 ; www.glyfinery.net). Municipal solid waste (MSW)…”