2，采用掃描電子顯微鏡、能譜儀、X射線衍射儀、BET比表面積法等對負(fù)載了TiO2的堇青石進(jìn)行表征，測定不同溫度下的負(fù)載速度。結(jié)果表明：負(fù)載了TiO2的堇青石主要由（211）及（200）取向的銳鈦礦TiO2組成，呈八面體和立方體形態(tài)，BET比表面積達(dá)78.80 m2·g-1，平均孔徑為9.80 nm，具有雙峰分布特征。負(fù)載過程為TiCl4及O2向堇青石基體擴(kuò)散吸附，TiCl4分解為Ti4+并在高氧勢下進(jìn)入基體晶格形成TiO2晶核，并經(jīng)過擇優(yōu)取向和外延式生長，其負(fù)載沉積速率方程為，其中T為負(fù)載溫度，為氣相TiCl4的分壓。;In order to explore the loading mechanism and loading kinetics of TiO2 on cordierite, the acid-etched cordierite was used as the matrix and the TiO2 loading test was conducted by the chemical vapor deposition (CVD) method. The scanning electron microscope, energy disperse spectroscope, X-ray diffraction, and Brunauer-Emmett-Teller (BET) specific surface area measurement were used to characterize the TiO2 on cordierite surface and determine the loading speed at different temperatures. The results show that the surface of modified cordierite with TiO2 mainly consists of (211)-oriented and (200)-oriented anatase-TiO2 which is the octahedron and cube with BET specific surface area of 78.80 m2·g-1, an average pore diameter of 9.80 nm, and a bimodal distribution. The loading process is the diffusion and adsorption of TiCl4 and O2 towards the cordierite matrix. TiCl4 decomposes and Ti4+ enters the matrix lattice under the high oxygen potential to form TiO2 nuclei. After the preferential orientation and epitaxial growth, the loading deposition rate equation is , where T is the loading temperature and is the partial pressure when TiCl4 is in the gas phase."/>
2;負(fù)載動力學(xué);catalyst;SCR;CVD;TiO2;loading kinetics"/>