固定床上TiO2催化正丁醛气相自缩合反应条件优化

Optimization of Gas Phase n-Butyraldehyde Self-Condensation Catalyzed by TiO_2 in a Fixed Bed Reactor

在单因素试验的基础上,采用响应曲面法对TiO_2催化正丁醛气相自缩合反应条件进行了优化。结果表明,在空时8 g·min?m L^(-1)、反应温度180℃、反应压力2.0 MPa的条件下,辛烯醛收率为81.2%,选择性为96.6%。在此基础上考察了TiO_2催化剂的稳定性,发现运行300 h后正丁醛的转化率、辛烯醛的收率和选择性基本保持不变,说明TiO_2具有良好的催化稳定性。

Gas-phase self-condensation of n-butyraldehyde catalyzed by TiO2was optimized by response surface methodology based on single factor experimental results.The results show that the yield and selectivity of2-ethyl-2-hexenal are81.2%and96.6%respectively under conditions of space-time8g·min·mL-1,reaction temperature180℃and reaction pressure2.0MPa.The stability of the TiO2catalyst was also investigated and the results show that the conversion of n-butyraldehyde,the yield and selectivity of2-ethyl-2-hexenal remain unchanged after300h,which indicates good stability of TiO2.