Al-MCM-41 Immobilized Ionic Liquids Catalysts Containing Double-Acid Active Sites for Biodiesel Production

作者：Ni Bang-Qing; Huang Jiang-Lei; Zhang Ping-Bo; Fan Ming-Ming^*

来源：Chinese Journal of Inorganic Chemistry, 2015, 31(5): 961-967.

• catalyst
• mesoporous molecular sieves
• ionic liquids
• immobilize
• biodiesel
• transesterification

The immobilized catalysts with double-acid active sites were synthesized by loading ionic liquids (ILs) on MCM-41 with different Si/Al molar ratios. The catalysts were characterized by XRD, FTIR, N-2 adsorption-desorption, thermogravimetric analysis and TEM, and the activities of catalysts were investigated by the transesterification of soybean oil with methanol for biodiesel synthesis as the probe reaction. The results demonstrated that the ionic liquids were successfully immobilized on the mesoporous molecular sieves. The catalysts could maintain their mesoporous structure and showed good catalytic performance in transesterification. The biodiesel yield was more than 90% under the condition of 30% ILs-loading, methanol to oil molar ratio of 36:1 and temperature at 140 degrees C for 5 h. The beneficial acid environment was created for the active component ILs by introducing Al to MCM-41, which greatly improved the catalytic performance of ILs. The ILs immobilized catalysts exhibited much higher activities in transesterification than the homogeneous ILs, and the ILs immobilized catalyst still yielded about 88% after four cycles.

• 出版日期2015-5-10
• 单位江南大学