焙烧温度对SO2-4/TiO2固体超强酸抗水稳定性的影响

李力成,扈翟,赵学娟,钱祺,王磊,宋珊珊,俞思凡,严俊,李小保

南京林业大学学报(自然科学版) ›› 2016, Vol. 40 ›› Issue (06) : 129-134.

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南京林业大学学报(自然科学版) ›› 2016, Vol. 40 ›› Issue (06) : 129-134. DOI: 10.3969/j.issn.1000-2006.2016.06.020
研究论文

焙烧温度对SO2-4/TiO2固体超强酸抗水稳定性的影响

  • 李力成1,扈 翟1,赵学娟2,钱 祺1,王 磊1,宋珊珊1,俞思凡1,严 俊1,李小保1
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Influence of calcination temperature on the water-resistant stability of SO2-4/TiO2 solid superacid

  • LI Licheng1, HU Di1, ZHAO Xuejuan2, QIAN Qi1, WANG Lei1, SONG Shanshan1, YU Sifan1, YAN Jun1, LI Xiaobao1
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摘要

通过水预处理方法对比研究了不同焙烧温度制备的SO2-4/TiO2固体超强酸的抗水稳定性,借助XRD、NH3-TPD、FT-IR、TG和BET等表征技术分析材料的结构特征。结果表明,当焙烧温度在500 ℃以下时,所制得的SO2-4/TiO2固体超强酸具有相近的优异酯化性能; 当焙烧温度提升至600 ℃以上时,SO2-4/TiO2的孔结构坍塌,SO2-4含量下降,酯化性能显著下降。经过水预处理后,所有固体超强酸酯化活性降低,主要与其SO2-4脱落和酸量明显减小有关。相比之下,400 ℃制备的SO2-4/TiO2固体超强酸催化剂具有较好的稳定性。

Abstract

A water pretreatment method was used to evaluate the water-resistant stability of SO2-4/TiO2 solid superacid prepared by calcination under different temperatures. The structural properties of samples were characterized by the X-ray diffraction(XRD), NH3-TPD, fourier transform-infrared(FT-IR)spectroscopy, thermogravimetric(TG)analysis, and BET surface area analysis. The results showed that, when the calcination temperature did not exceed 500 ℃, the obtained SO2-4/TiO2 solid superacid had similar esterification performances. However, the pore structure of solid superacid collapsed and its SO2-4 content decreased when the calcination temperature exceeded 600 ℃. In this case, the esterification performance of the solid superacid was poor. After the water pretreatment, the esterification performances of all solid superacids descended, which was mainly attributed to the removal of SO2-4 and the decrease of acid amount. In a comparison, SO2-4/TiO2 solid superacid prepared at a calcination temperature of 400 ℃ had the optimum water-resistant stability.

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李力成,扈翟,赵学娟,钱祺,王磊,宋珊珊,俞思凡,严俊,李小保. 焙烧温度对SO2-4/TiO2固体超强酸抗水稳定性的影响[J]. 南京林业大学学报(自然科学版). 2016, 40(06): 129-134 https://doi.org/10.3969/j.issn.1000-2006.2016.06.020
LI Licheng, HU Di, ZHAO Xuejuan, QIAN Qi, WANG Lei, SONG Shanshan, YU Sifan, YAN Jun, LI Xiaobao. Influence of calcination temperature on the water-resistant stability of SO2-4/TiO2 solid superacid[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2016, 40(06): 129-134 https://doi.org/10.3969/j.issn.1000-2006.2016.06.020
中图分类号: TQ 032.4   

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基金

基金项目:国家自然科学基金项目(21406118,91434109,91334202); 南京林业大学人才启动基金项目(GXL2014036); 江苏省双创计划,科技副总(企业创新岗)特聘专家项目; 南京林业大学大学生创新训练计划项目(2015sjcx032); 江苏高校优势学科建设工程资助项目(PAPD)
第一作者:李力成(llc0024@yahoo.com),讲师,博士。
引文格式:李力成,扈翟,赵学娟,等. 焙烧温度对SO2-4/TiO2固体超强酸抗水稳定性的影响[J]. 南京林业大学学报(自然科学版),2016,40(6):129-134.

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