关键词: 质量传递;动力学;氧化镁;碳化物;机械压力;CO₂;搅拌机;温度;转速;二氧化碳

Abstract: The carbonization of magnesium oxide particles by CO2 was investigated using a stirring
mill reactor.The effects of the system temperature, stirring rotation speed, influx rate of
CO2 and initial diameter of the magnesium oxide particles on the carbonization process were
determined. The results show that the system temperature and the stirring rotation speed
are the most significant influencing factors on the carbonization rate. The determination
of critical decomposition temperature (CDT) gives the maximum carbonization rate with other
conditions fixed. A theoretical model involving mass transfer and reaction kinetics was
presented for the carbonization process.The apparent activation energy was calculated to be
32.8kJ·mo1^-1. The carbonization process is co-controlled by diffusive mass transfer and
chemical reaction. The model fits well with the experimental results.

Key words: mechanical force, kinetics, carbonization, magnesium oxide, mass transfer