TiO_(2)、ZrO_(2)的制备及其吸附吡啶的性能  

PREPARATION OF TiO_(2) AND ZrO_(2) AND THEIR ADSORPTION PERFORMANCE FOR PYRIDINE

作　　者：王聚财 唐克[1] 富添 孙潇镝 洪新[1] Wang Jucai;Tang Ke;Fu Tian;Sun Xiaodi;Hong Xin(School of Chemical and Environmental Engineering,Liaoning University of Technology,Jinzhou,Liaoning 121001)

机构地区：[1]辽宁工业大学化学与环境工程学院,辽宁锦州121001

出　　处：《石油炼制与化工》2024年第11期31-39,共9页Petroleum Processing and Petrochemicals

基　　金：辽宁省自然科学基金项目(2019-ZD-0699);辽宁省教育厅高等学校基本科研项目(面上项目)(JYTMS20230852)。

摘　　要：采用水热-腐蚀法和溶胶-凝胶法分别制备了锐钛矿相TiO_(2)及立方相ZrO_(2),并对其进行X射线衍射、N_(2)吸附-脱附、傅里叶变换红外光谱和扫描电镜等表征。以TiO_(2)及ZrO_(2)为吸附剂,以含有吡啶的正十二烷为模拟柴油,考察了TiO_(2)及ZrO_(2)用量、吸附时间、吸附温度等对模拟柴油吸附脱氮效果的影响。结果表明:TiO_(2)及ZrO_(2)对吡啶的吸附可在较短时间内达到平衡,吸附过程符合准一级、准二级动力学方程;温度对TiO_(2)及ZrO_(2)吸附吡啶的效果无明显影响,TiO_(2)及ZrO_(2)吸附吡啶是单层吸附和多层吸附共存的吸附。利用模拟计算方法研究了吡啶在TiO_(2)(101)、ZrO_(2)(111)晶面吸附过程中的吸附构型、吸附能等情况,发现吡啶在TiO_(2)(101)、ZrO_(2)(111)晶面吸附时可形成N—Ti、N—Zr化学键,相应的吸附能分别为-188.59 kJ/mol和-157.34 kJ/mol,说明吡啶能稳定吸附于TiO_(2)(101)、ZrO_(2)(111)晶面。Anatase TiO_(2) and cubic ZrO_(2) were prepared by hydrothermal-corrosion method or sol-gel method,respectively,and characterized by X-ray diffraction,N_(2) adsorption-desorption and FT-IR and SEM.Using TiO_(2) and ZrO_(2) as adsorbents and n-dodecane containing pyridine as simulated diesel fuel,the effects of TiO_(2) and ZrO_(2) dosage,adsorption time and adsorption temperature on the adsorption and denitrification of simulated diesel fuel were investigated.The results showed that the adsorption of pyridine on TiO_(2) and ZrO_(2) could reach the adsorption equilibrium in a short time,and the adsorption process conformed to the quasi-primary and secondary kinetic equations.The temperature has no obvious effect on the adsorption of pyridine by TiO_(2) and ZrO_(2),and the adsorption of pyridine by TiO_(2) and ZrO_(2) is the coexistence of single-layer adsorption and multi-layer adsorption.The adsorption configurations and adsorption energy of pyridine on the TiO_(2)(101)and ZrO_(2)(111)crystal surfaces were studied by simulation method.Pyridine can form N—Ti and N—Zr chemical bonds on the crystal surfaces of TiO_(2)(101)and ZrO_(2)(111),and the corresponding adsorption energies of pyridine are-188.59 kJ/mol and-157.34 kJ/mol,respectively.The results indicated that pyridine could be stably adsorbed on the TiO_(2)(101)and ZrO_(2)(111)crystal surfaces.

关 键 词：二氧化钛 二氧化锆 吡啶 吸附 

分 类 号：TQ424[化学工程]