转炉烟气中金属氧化物催化煤焦-CO2气化反应

 提出了利用转炉烟气中金属氧化物催化煤焦 CO2气化反应的新方法来提高CO2转化效率。利用热重分析对金属氧化物催化煤焦 CO2气化进行理论研究，并通过滴管炉研究了不同温度下金属氧化物对煤粉 CO2气化反应的影响。计算不同条件下的α、β、LHV值，对催化效率进行评估。结果表明，金属氧化物对煤焦 CO2气化具有显著的催化作用，并表现出不同的特征温度。添加催化剂后，可燃性气体含量增加，CO2含量降低。根据α、β、LHV值的计算，复合催化剂催化效率最佳，而且催化效率随温度升高而增加。对于单一催化剂，在1 000~1 200 ℃温度范围内，CaO的催化效率优于FeO，FeO稍优于Fe2O3。滴管炉试验结果初步验证了利用转炉烟气中金属氧化物提高CO2的转化效率以及转炉煤气热值的可行性。

Gasification of coal char with CO2 catalyzed by metallic #br# oxides in converter flue gas

A new method was proposed in which the CO2 gasification of coal char was catalyzed by metallic oxides in the flue gas of converter to improve the conversion efficiency of CO2. The CO2 gasification of coal char catalyzed by metallic oxides was theoretically investigated using thermo gravimetric analysis，and the effect of the metallic oxides on coal gasification with CO2 was evaluated by drop tube furnace experiments at different temperatures. The catalytic efficiency was evaluated by α，β and LHV values calculated under different conditions. The results indicated that the metallic oxides had significant catalytic effects on the CO2 gasification of coal，and exhibited the different characteristics temperatures. The combustible gas content was increased and the CO2 content was decreased with catalysts. The catalytic efficiency of composite catalysts was superior to others on the basis of the calculation of α，β and LHV values. For the single catalyst，the catalytic efficiency of CaO was better than that of FeO，which was superior slightly to Fe2O3 in the temperature range of 1 000 1 200 ℃，and the catalytic efficiency increased with the increase of temperature. The experimental results of the drop tube furnace preliminarily verified the feasibility of using metallic oxides in converter flue gas to improve the conversion efficiency of CO2 and the calorific value of converter gas.