焙烧温度对SO2-4/TiO2固体超强酸抗水稳定性的影响

doi:10.3969/j.issn.1000-2006.2016.06.020

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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

焙烧温度对SO^2-₄/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

1. 南京林业大学化学工程学院,江苏南京 210037;
2. 南京工程学院材料工程学院,江苏南京 211167

出版日期:2016-12-18 发布日期:2016-12-18
基金资助:
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SO^2-₄/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.

Influence of calcination temperature on the water-resistant stability of SO^2-₄/TiO₂ solid superacid

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

1. College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China;
2. School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 211167, China

Online:2016-12-18 Published:2016-12-18

摘要/Abstract

摘要： 通过水预处理方法对比研究了不同焙烧温度制备的SO^2-₄/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SO^2-₄/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,SO^2-₄/TiO₂的孔结构坍塌,SO^2-₄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SO^2-₄脱落和酸量明显减小有关。相比之下,400 ℃制备的SO^2-₄/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 SO^2-₄/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 SO^2-₄/TiO₂ solid superacid had similar esterification performances. However, the pore structure of solid superacid collapsed and its SO^2-₄ 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 SO^2-₄ and the decrease of acid amount. In a comparison, SO^2-₄/TiO₂ solid superacid prepared at a calcination temperature of 400 ℃ had the optimum water-resistant stability.

中图分类号:

TQ 032.4

李力成,扈翟,赵学娟,等. 焙烧温度对SO^2-₄/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.

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 SO^2-₄/TiO₂ solid superacid[J].Journal of Nanjing Forestry University (Natural Science Edition), 2016, 40(06): 129-134.DOI: 10.3969/j.issn.1000-2006.2016.06.020.

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焙烧温度对SO^2-₄/TiO₂固体超强酸抗水稳定性的影响

Influence of calcination temperature on the water-resistant stability of SO^2-₄/TiO₂ solid superacid

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