石油化工高等学校学报

石油化工高等学校学报 ›› 2009, Vol. 22 ›› Issue (1): 26-30.

• 石油化工 • 上一篇    下一篇

胶溶剂对TiO2成型载体性能的影响

王继元1,2, 顾越峰1, 陈韶辉1, 李晓强1, 卞伯同1, 曾崇余2   

  1. 1.中国石化扬子石油化工有限公司研究院,江苏南京210048;
    2.南京工业大学化学化工学院,江苏南京210049
  • 收稿日期:2008-03-10 修回日期:2008-11-11 出版日期:2009-03-25 发布日期:2009-03-25
  • 作者简介:王继元(1979 -), 男, 江苏铜山县, 工程师, 博士
  • 基金资助:
    中国石化扬子石油化工有限公司企业博士后基金资助(K07CN07)

Effect of Peptizers on Properties of Formed TiO2 Supports

  1. 1. Research Institute, SINOPEC Yangzi Petrochemical Company Ltd., Nanjing Jiangsu 210048, P.R.China; 
    2. College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing Jiangsu 210009, P.R.China
  • Received:2008-03-10 Revised:2008-11-11 Published:2009-03-25 Online:2009-03-25

摘要: 以 TiO 2 粉体为原料 ,采用挤条成型的方法制备了TiO2成型载体。考察了制备过程中胶溶剂类型柠檬酸含量﹑硝酸含量以及粘结剂/柠檬酸复配比等对TiO2成型载体性能的影响,并用抗压强度测试﹑比表面积(BET)﹑扫描电镜(SEM)等手段进行了表征。结果表明,胶溶剂的加入均可不同程度提高TiO2成型载体的抗压强度,但对载体的比表面积影响不显著。柠檬酸质量分数3%时载体的抗压强度最高;加入硝酸可提高载体的抗压强度外,还可使载体的孔径分布集中。采用适宜的粘结剂 /柠檬酸复配比,有利于制备抗压强度高﹑孔径分布集中﹑表面缺陷少的TiO2成型载体。在硝酸质量分数3%、m(粘结剂)/ m(柠檬酸)为4∶6,焙烧温度700℃的制备条件下,载体的抗压强度﹑比表面积和孔容可分别达125 .8 N/cm,48 .6 m2 / g和 0 .33 cm3 / g。

关键词: 二氧化钛 , 挤出成型 , 载体 , 胶溶剂 , 柠檬酸 , 硝酸

Abstract: Formed TiO supports were prepared by extrusion process using TiO powder as raw material.The influence of the kinds of peptizers,the contents of citric acid,the contents of nitric acid,and the binder/citric acid mass ratios on properties of the formed TiO supports were investigated,and these supports were characterized by crushing strength test,BET and SEM methods.The results show that all the peptizers can improve the crushing strength of the formed TiOsupports;however, peptizers have little effect on the surface area of the supports. The added citric acid can remarkably increase the crushing strength of the formed TiO supports,and the maximum value can be obtained when mass fraction of 3% citric acid is added. Addition of HNO can increase the crushing strength and narrow the pore size distribution of the formed TiO2 supports.It is also found that the formed TiO supports with high crushing strength,narrow pore size distribution and little surface defects can be prepared using the suitable binder/citric acid mass ratio.Under the preparation conditions of nitric acid mass fraction of 3%,binder/citric acid mass ratio of 4:6 and calcination temperature of 700 ℃,the crushing strength,surface area and pore volume of the formed TiO support can reach 125.8 N/cm,48.6 m /g and 0.33 cm /g,respectively.

Key words: Titanium dioxide , Extrusion molding , Support , Peptizer , Citric acid , Nitric acid

引用本文

王继元,顾越峰,陈韶辉. 胶溶剂对TiO2成型载体性能的影响[J]. 石油化工高等学校学报, 2009, 22(1): 26-30.

WANG Ji-yuan,GU Yue-feng,CHEN Shao-hui,et al. Effect of Peptizers on Properties of Formed TiO2 Supports[J]. Journal of Petrochemical Universities, 2009, 22(1): 26-30.

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