How to remove glycerol from biodiesel by ion exchange resin
The pore size distribution of macroporous resin adsorption analyzer and specific surface area were investigated. The static dynamic behavior of free glycerol of macroporous resin in biodiesel and the influence of water content on the adsorption of glycerol. The experimental results show that four kinds of macroporous adsorption resins with dynamic characteristics, the equilibrium time for NWD2 250min,NWD1, NWD3 and NWD4 for 270min;NWD2 in accordance with the kinetic equation, the correlation coefficients are 0.99; control steps of NWD2 particle diffusion and film diffusion, the other is the control step of resin particle diffusion; influence of water content on the resin adsorption capacity is relatively large, dry adsorption resin is lower than 20mg/g, when the saturated water content, the maximum adsorption capacity of NWD4, for in addition to 106.78mg/g, NWD1 resin, water content and adsorption capacity linearly over 30% moisture content in NWD1 resin when the adsorption does not affect glycerol.
In this paper, biodiesel was prepared from soybean oil and methanol by alkali catalyzed method. The biodiesel was prepared as raw materialThe IR spectra of the soybean oil and the transesterification products were characterized to determine the fatty acid methyl ester reaction products, and GC-MS was used on the composition of fatty acid methyl esters were analyzed, its main components are palmitic acid methyl ester, 10,13- twenty carbon two acid methyl ester, methyl oleate, 11- twenty carbon 19- methyl methacrylate, methyl nineteen alkyl acid and behenic acid methyl ester.
In recent years, in order to alleviate the energy shortage and environmental pollution problems, biodiesel as a renewable and environment-friendly energy by the people's attention. Glycerol is the main by-product of biodiesel production, the implementation of our country is one of the important indexes of.2007 evaluation of biodiesel quality in the national standard of biodiesel provides free glycerol content no more than 0.02%. in Chinese biodiesel refining process is not perfect, so the purification process of biodiesel research, especially has important theoretical and practical significance to study the removal of glycerol in biodiesel.
