Metakaolinite as a catalyst for biodiesel production from waste cooking oil  

作　　者：Academic Unit of Chemical Sciences Autonomous University Of Zaeateeas Zacatecas 98160, M6xico 

机构地区：[1]Academic Unit of Chemical Sciences, Autonomous University of Zacatecas, Zacatecas 98160, M6xico [2]University of Guanajuato, Guanajuato 36050, M6xico [3]Potosino Institute of Scientific and Technological Research, San Luis Potosi 78216, M6xico

出　　处：《Frontiers of Chemical Science and Engineering》2012年第4期403-409,共7页化学科学与工程前沿（英文版）

摘　　要：The use of metakaolinite as a Catalyst in the transesterification reaction of waste cooking oil with methanol to obtain fatty acid methyl esters （biodiesel） was studied. Kaolinite was thermally activated by dehydroxylation to obtain the metakaolinite phase. Metakaolinite samples were characterized using X-ray diffraction, Nz adsorption-desorption, simultaneous thermogravimetric analyse/differential scanning calorimetry （TGA/DSC） experiments on the thermal decomposition of kaolinite and Fourier-transform infrared spectrometer （FTIR） analysis. Parameters related to the transesterificaion reaction, including temperature, time, the amount of catalyst and the molar ratio of waste cooking oil to methanol, were also investigated. The transesterification reaction produced biodiesel in a maximum yield of 95% under the following conditions： metakaolinite, 5 wt-% （relative to oil）; molar ratio of oil to methanol, 1：23; reaction temperature, 160℃; reaction time, 4 h. After eight consecutive reaction cycles, the metakaolinite can be recovered and reused after being washed and dried. The biodiesel thus obtained exhibited a viscosity of 5.4 mm2＂ s-1 and a density of 900.1 kg-m-3. The results showed that metakaolinite is a prominent, inexpensive, reusable and thermally stable catalyst for the transesterification of waste cooking oil.The use of metakaolinite as a Catalyst in the transesterification reaction of waste cooking oil with methanol to obtain fatty acid methyl esters （biodiesel） was studied. Kaolinite was thermally activated by dehydroxylation to obtain the metakaolinite phase. Metakaolinite samples were characterized using X-ray diffraction, Nz adsorption-desorption, simultaneous thermogravimetric analyse/differential scanning calorimetry （TGA/DSC） experiments on the thermal decomposition of kaolinite and Fourier-transform infrared spectrometer （FTIR） analysis. Parameters related to the transesterificaion reaction, including temperature, time, the amount of catalyst and the molar ratio of waste cooking oil to methanol, were also investigated. The transesterification reaction produced biodiesel in a maximum yield of 95% under the following conditions： metakaolinite, 5 wt-% （relative to oil）; molar ratio of oil to methanol, 1：23; reaction temperature, 160℃; reaction time, 4 h. After eight consecutive reaction cycles, the metakaolinite can be recovered and reused after being washed and dried. The biodiesel thus obtained exhibited a viscosity of 5.4 mm2＂ s-1 and a density of 900.1 kg-m-3. The results showed that metakaolinite is a prominent, inexpensive, reusable and thermally stable catalyst for the transesterification of waste cooking oil.

关 键 词：BIODIESEL METAKAOLINITE transesterification waste cooking oil 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业] TU528[建筑科学—建筑技术科学]