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论文编号:HG118 论文字数:15781,页数:34
摘 要：本文通过沉淀-浸渍法，溶胶-凝胶法，制备了一系列S2O82-/ZrO2-SiO2，S2O82-/TiO2，S2O82-/TiO2/La3+稀土型固体超强酸催化剂。采用比表面仪以及红外光谱对固体酸的结构和比表面进行表征。结果表明S2O82-/ZrO2-SiO2型固体酸的比表面积在这三种催化剂中最大。另外，逐一考察其对蔗糖催化水解生成乙酰丙酸反应的活性。可以发现S2O82-/TiO2型固体酸在水解催化蔗糖反应中是一类良好的固体酸催化剂。当 S2O82-/TiO2型固体酸作为催化剂催化水解蔗糖时，目的产物乙酰丙酸的收率最高。实验结果显示：当焙烧温度为700℃，焙烧时间为3h时，所制备的S2O82-/TiO2催化剂催化水解蔗糖，LA的收率是最高的，收率可以达到40%多。
对于蔗糖催化水解生成乙酰丙酸的反应体系，选择出S2O82-/TiO2型固体酸为一种活性较高的固体酸催化剂，为进一步的研究提供了基础性数据。
关键词： 乙酰丙酸；蔗糖；固体酸；表征；活性
The Preparation ，Properties and Characterization of Solid Acid
Abstract:A series of S2O82-/ZrO2-SiO2, S2O82-/TiO2 and S2O82-/TiO2/La3+ rare earth super solid acid catalysts were prepared by the method of precipitation-impregnation and sol-gel. Solid super acid catalysts were characterized by means of IR and BET. The result indicate that S2O82-/TiO2 catalyst’s BET is the biggest. The catalysts were studied in hydrolysis of sucrose soluions reaction respectively. The S2O82-/TiO2 solid acid catalysts are favorable solid acid catalysts in hydrolysis of sucrose solutions reaction. Of the three catalysts tested, the S2O82-/TiO2 solid acid catalysts off the highest, The result indicate that: when the rosting temperature is 700℃, the roasting time is 3h, the yield of LA can reach 40%.
Consequently,for the hydrolysis of sucrose soluions reaction reaction system, S2O82-/TiO2 solid acid catalysts is hopefully to be used as candidate of the hydrolysis reaction catalyst. Further more, this paper offers basic dadt for a further study.
Keywords：Levulinic acid; sucrose soluion; Solid acid; Characterization;Activity
目 录
中文摘要 I
英文摘要 II
目录 III
1 绪论 1
1.1 前言 1
1.2 乙酰丙酸 2
1.3 固体酸催化剂 5
1.4 本文研究的内容 9
2 实验部分 11
2.1 实验试剂与仪器 11
2.2 固体超强酸的制备 12
2.3 固体超强酸的氮吸附比表面(BET)测定 14
2.4 固体超强酸的红外光谱测定 15
2.5 蔗糖水解反应 15
2.6 反应产物分析 15
3 结果与讨论 16
3.1 固体超强酸的氮吸附比表面(BET)测定 16
3.2 几种固体超强酸的IR图分析 18
3.3 几种固体超强酸的活性 21
4 总结与展望 26
4.1 总结 26
4.2 展望 26
致谢 28
参考文献 29
几种固体酸的制备及性能与表征......
