本研究以—微分塡充床反應器探討氧化鈣粉粒與二氧化硫反應的動力學。除了初始階段外，反應速率是由產物層擴散所控制。化學反應速率常數不受氧化鈣的先驅物與其鍛燒程序所影響，但產物層擴散係數在初始階段則受到上述兩因素的影響，並隨著氧化鈣的轉化而減少至一定值。產物層擴散係數的變化可以其受氧化鈣及硫酸鈣結晶缺陷的濃度的影響來解釋。
The kinetics of the reaction of CaO powder with SO2 was studied in a differential packed-bed reactor. The reaction rate was controlled by product layer diffusion, except in the initial stage. The intrinsic chemical reaction rate constant was insensitive to the precursor and the calcinations history of CaO, but the product layer diffusivity was affected by these two factors in the initial stage and decreased to a constant value with increasing conversion of CaO. The variation of product layer diffusivity with these factors was explained by its dependence on the concentrations of defects in CaO and CaSO4 crystals.
關聯:
Journal of the Chinese Institute of Chemical Engineers ； 35卷4期 (2004 / 07 / 01) ， P447 - 454
