000			02104nab a2200193 4500
005			20260520000830.0
008			260224s2009 xxu
245	0	0	_aBatch study of glycerol decomposition in one-stage supercritical production of biodiesel
260			_a _b _cene. 2009
270			_a31/07/2009 ; 31/07/2009
300			_a14 p. ; 1076-1080
520			_aTranscripción del resúmen publicado por el autor: The objective of this work was to assess some of the points that need to be elucidated in order to define the economic viability of the noncatalytic supercritical biodiesel process. Net yield of the supercritical process, consumption of methanol, and the quality of the fuel issuing from the reactor were studied. Biodiesel was prepared by reacting refined soy oil with supercritical methanol at T = 280 °C and methanol-to-oil molar ratios of 15 and 20. After the reaction, unreacted methanol, water, and other volatile compounds were removed from the product by stripping with nitrogen at 110 °C. Biodiesel production by the reaction of oils in supercritical methanol under the conditions used in this work produces practically no glycerol byproduct. This fact simplifies the downstream refining of the produced biodiesel. Glycerol is transformed into products of smaller molecular size and water. At first this water reacts with the triglycerides of the reacting mixture to form free fatty acids (FFA), thus increasing the acidity of the product. At longer reaction times the acids are converted into methyl esters again. Glycerol methanolysis reactions increase the methanol consumption. The small amount of glycerides and FFA contaminants in the biodiesel product makes a final step of refining by silica adsorption convenient. No liquid effluents are issued with such a refining step. After the FFA and glycerides are recycled, the yield of the process is 94-96%.
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aAimaretti, N. _941691
100	1		_aManuale, D.L. _941692
100	1		_aMazzieri, V.M. _941693
999			_c170239 _d170239