幾種固體酸的制備及性能與表征

化工論文編號:HG118  論文字數:15781,頁數:34

目  錄
中文摘要 I
英文摘要 II
目錄 III
1  緒論 1
1.1  前言 1
1.2  乙酰丙酸 2
1.3  固體酸催化劑 5
1.4  本文研究的內容 9
2  實驗部分 11
2.1  實驗試劑與儀器 11
2.2  固體超強酸的制備 12
2.3  固體超強酸的氮吸附比表面(BET)測定 14
2.4  固體超強酸的紅外光譜測定 15
2.5  蔗糖水解反應 15
2.6  反應產物分析 15
3  結果與討論 16
3.1  固體超強酸的氮吸附比表面(BET)測定 16
3.2  幾種固體超強酸的IR圖分析 18
3.3  幾種固體超強酸的活性 21
4  總結與展望 26
4.1  總結 26
4.2  展望 26
致謝  28
參考文獻  29

 摘 要：本文通過沉淀-浸漬法，溶膠-凝膠法，制備了一系列S2O82-/ZrO2-SiO2，S2O82-/TiO2，S2O82-/TiO2/La3+稀土型固體超強酸催化劑。采用比表面儀以及紅外光譜對固體酸的結構和比表面進行表征。結果表明S2O82-/ZrO2-SiO2型固體酸的比表面積在這三種催化劑中最大。另外，逐一考察其對蔗糖催化水解生成乙酰丙酸反應的活性�？梢园l現S2O82-/TiO2型固體酸在水解催化蔗糖反應中是一類良好的固體酸催化劑。當 S2O82-/TiO2型固體酸作為催化劑催化水解蔗糖時，目的產物乙酰丙酸的收率最高。實驗結果顯示：當焙燒溫度為700℃，焙燒時間為3h時，所制備的S2O82-/TiO2催化劑催化水解蔗糖，LA的收率是最高的，收率可以達到40%多。
 對于蔗糖催化水解生成乙酰丙酸的反應體系，選擇出S2O82-/TiO2型固體酸為一種活性較高的固體酸催化劑，為進一步的研究提供了基礎性數據。
 
 
 關鍵詞： 乙酰丙酸；蔗糖；固體酸；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