Performance Evaluation of Biodiesel Production by Solid/Liquid Catalysts

• Main Authors: Jiang-yau Chuan, 蔣燿州
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/48471398009882536199

碩士 === 國立雲林科技大學 === 環境與安全工程系碩士班 === 95 === Human beings are using a great quantity of petrochemical energy, and then CO2 and waste gas are discharged constantly as a result of the green house effect, which has bring about a great deal of serious global warming problems. In the recently years, the price of crude oil has risen rapidly which points out the shortage of crude oil in the world due to the increasing demand of energy resources. It is necessary to invent new cleaning power sources in order to avoid the exhaustion of petrochemical energy. Biodiesel has a character of regeneration which is able to decrease the usage of Petroleum diesel and decelerate the global warming. In a commercial process of Biodiesel, we use NaOH as catalysts to go along transesterification reaction which turns triglycerides into Methyl Ester of Fatty Acids, neutralizing an acid with a base. However, bathing Methyl Ester of Fatty Acids brings a phenomenon of emulsification and waste water. In this study, I tried three reaction routes to improve traditional procedure and manufacture low polluted biodiesel. Firstly, adding Solid Catalysts (Zr(SO4)2．4H2O and SO42-/ZrO2 ) turns transesterification reaction respectively to omit the process of bathing. Secondly, putting Solid Catalysts and co-solvent (Tetrahydrofuran) together are in the normal room temperature Thirdly, after alkaline-catalyzed transesterification reaction, using adsorbent (Magnesol D60) is able to replace the step of bathing. The result shows, firstly, the outcome of Zr(SO4)2．4H2O transesterification is preferable to SO42-/ZrO2, therefore, 4% wt. of Zr(SO4)2．4H2O is added and a temperature of 65℃ is controlled, methanol/oil(mol/mol) is 6:1, after 12 hours, the transesterification rate can up to 90%. Secondly, the action of transesterification in the room temperature, we control the methanol/oil(mol/mol) ratio is 3:1, and THF appends 1.25 times the volume of methanol. The transesterification rate reaches to 89.5% after 12 hours. Thirdly, the process of eluting and neutralizing an acid with a base is adding 1%(wt) of Magnesol D60 to elution that reduce the phenomenon of emulsification and saponification, and the pH tend towards neutral. In addition, the cost of using magnesol D60 is 3% higher than elution.