CAJ | 학술논문

利用微型流化床反应分析仪（MFBRA）和热重分析仪（TGA）比较煤焦与 CO2的非等温气化反应特性，并利用单一升温速率法和组合升温速率法计算反应动力学数据。结果表明：升温速率对半焦非等温气化过程有重要影响，随着升温速率的增大，起始反应温度和最大反应速率对应的气化温度增加，同一气化温度下的碳转化率降低，而且利用单一升温速率法求取气化反应的活化能逐渐减小。与TGA相比，同一升温速率下，MFBRA中半焦气化反应的起始反应温度和最大反应速率对应的反应温度明显较小，而且升温速率越大差异越显著。无论是单一升温速率法（升温速率≥5℃·min?1）还是组合升温速率法，TGA测得的动力学数据均明显小于MFBRA测得的动力学数据。高升温速率下（升温速率≥5℃·min?1）半焦在TGA和MFBRA中非等温气化行为和动力学数据的差异很可能与MFBRA内较好的热量传递和受扩散的抑制作用较小有关。
이용미형류화상반응분석의（MFBRA）화열중분석의（TGA）비교매초여 CO2적비등온기화반응특성，병이용단일승온속솔법화조합승온속솔법계산반응동역학수거。결과표명：승온속솔대반초비등온기화과정유중요영향，수착승온속솔적증대，기시반응온도화최대반응속솔대응적기화온도증가，동일기화온도하적탄전화솔강저，이차이용단일승온속솔법구취기화반응적활화능축점감소。여TGA상비，동일승온속솔하，MFBRA중반초기화반응적기시반응온도화최대반응속솔대응적반응온도명현교소，이차승온속솔월대차이월현저。무론시단일승온속솔법（승온속솔≥5℃·min?1）환시조합승온속솔법，TGA측득적동역학수거균명현소우MFBRA측득적동역학수거。고승온속솔하（승온속솔≥5℃·min?1）반초재TGA화MFBRA중비등온기화행위화동역학수거적차이흔가능여MFBRA내교호적열량전체화수확산적억제작용교소유관。
The non-isothermal gasification behavior of coal char with CO2 was comparatively studied in the newly developed micro fluidized bed reaction analyzer (MFBRA) and a commercial thermogravimetric analyzer (TGA). The reaction kinetics data were calculated according to the methods of single heating rate and combination heating rate. The experimental data demonstrated that heating rate had obvious influence on coal char gasification. Increasing heating rate evidently increased reaction initiation temperature(Tx≈0), and reaction temperature corresponding to the maximum reaction rate(RmaxT), but it gradually decreased char conversion at a given temperature and the activation energy estimated by the method of single heating rate. Comparing the results from TGA and MFBRA at the same heating rate clarified that bothTx≈0 andRmaxTwere relatively lower for MFBRA, and the higher the heating rate, the larger the difference between MFBRA and TGA. The measurement using MFBRA led to higher activation energy for char-CO2 gasification, no matter the adopted estimation method of single heating rate (≥5℃·min?1) or combination heating rate. The difference in kinetics data tested by TGA and MFBRA at higher heating rate (≥5℃·min?1) could be much related to better heat transfer and lower diffusion inhibition.