介孔SO42-/Zr-SBA-15催化废弃油制生物柴油

采用廉价的无机锆源(无水硝酸锆)通过一步法合成表面含强Lewis酸位的SO₄^2-/Zr-SBA-15,该催化剂材料在废弃食用油和甲醇酯交换制生物柴油过程中表现出良好的催化活性和选择性. 实验考察了酯交换反应的最佳条件为：反应温度160 oC、反应时间12 h、催化剂Zr:Si为0.11、催化剂用量为10%、醇油比30:1. SO₄^2-/Zr-SBA-15在最佳反应条件下可使甘油三酯的转化率达到92.3%,脂肪酸甲酯的产率为91.7%. SO₄^2-/Zr-SBA-15具有高比表面积的介孔结构和表面酸性,且具有良好的反应稳定性和重复性,反应7次后的脂肪酸甲酯的产率仍稳定保持在74 ±1%.     

Biodiesel Production from Waste Cooking Oil over Mesoporous SO42-/Zr-SBA-15

Biodiesel production from waste cooking oils over SO₄^2-/Zr-SBA-15 catalyst was successfully carried out and investigated. SO₄^2-/Zr-SBA-15 catalyst was prepared by one-step process using anhydrous zirconium nitrate as zirconium resource, and endowed with the strong Lewis acid sites formed by supporting the zirconium species onto the SBA-15 surface. The asprepared SO₄^2-/Zr-SBA-15 showed excellent triglyceride conversion efficiency of 92.3% and fatty acid methyl esters (FAME) yield of 91.7% for the transesteriffication of waste cooking oil with methanol under the optimized reaction conditions: the methanol/oil molar ratio of 30, the reaction temperature of 160 oC, the reaction time of 12 h and 10wt% of catalyst. It was noticed that the as-prepared SO₄^2-/Zr-SBA-15 materials with the higher area surface of mesoporous framework and the surface acidity displayed excellent stability and reusability, maintaining high FAME yield of (74±1)% after seven runs of reaction.