载体酸处理对蓄热-催化双功能催化剂性能的影响

Acid treatment of support on the performance of catalysts combined with heat storage function

研究了载体硝酸处理对自制蓄热-催化双功能催化剂性能的影响。利用DSC和XRD等手段对其进行了表征,采用表面吸附仪测定了催化剂的N2吸附脱附等温线,并由BET理论模型计算其比表面积,考察了催化剂在实验室规模流向变换反应器中的应用特性。结果表明,酸处理并未改变载体的物相结构,对催化剂的蓄热性能几乎无影响;载体经硝酸处理后,催化剂催化活性增强,稳态操作中甲苯转化率在400℃时为97.42%,比酸处理前提高了近5%;酸处理后,催化剂在流向变换反应器应用中亦表现出良好的蓄热性能。

The effect of support treatment with HNO3 on the performance of the self-made catalysts combined with heat storage function was studied. The catalysts were characterized by DSC and XRD techniques, and the specific surface area were calculated using BET theoretical models according to their nitrogen adsorption isotherms. Besides, the application characteristics of the catalysts combined with heat storage function in reverse flow reactor was investigated. It was found that the heat storage function of the catalysts was almost unaffected with no change in crystalline phase after acid treatment. While the catalytic activity of the catalysts was obviously enhanced after acid treatment, toluene conversion reached to 97.42% at 400 ~C at steady-state, which was increased by about 5% as compared to the catalyst without acid treatment. The catalysts with acid treatment also showed good heat storage function in reverse flow reactor applications.