转炉渣吸附CO_2反应研究

Study on CO_2 adsorption reaction of converter slag

采用PCA-2200型化学吸附分析仪,考察了不同温度下转炉渣对纯CO_2和模拟高炉煤气中CO_2的吸附能力。模拟高炉煤气的成分为φ(CO_2)=19.89%、φ(CO)=25.00%以及φ(N_2)=55.11%,没有考虑高炉煤气中其他少量气体的影响。试验结果表明:温度对转炉渣吸附CO_2反应有显著影响,升高温度可以提高转炉渣对CO_2的吸附能力。在400℃时,每千克转炉渣吸附纯CO_2和模拟高炉煤气中CO_2量分别为3.448 g和5.575 g,可以看出,该温度下转炉渣对模拟高炉煤气中CO_2吸附能力更强,随着反应温度升高到500℃和550℃时,转炉渣对纯CO_2的吸附能力强于高炉煤气中CO_2。在550℃时,每千克转炉渣吸附纯CO_2和模拟高炉煤气中CO_2量达到最高,分别为9.339 g和7.062 g。

The adsorption capacity of converter slag for pure CO2 and CO2 in simulated blast furnace gas was detected by PCA-2200 chemical adsorption analyzer. Regardless of the influence of other gases in the blast furnace gas,the simulated blast furnace gas was consisted of 19.89 %(volume fraction) CO2, 25.00 % CO, and 55.11 % N2. The results show that the temperature has a notable effect on the CO2 adsorption reaction of converter slag. Increasing temperature improves the adsorption capacity of converter slag for CO2. At 400 ℃,the adsorption amount of pure CO2 and CO2 in simulated blast furnace gas per kilogram of converter slag is 3.448 g and 5.575 g,respectively. However,when the reaction temperature rises to 500 ℃ and 550 ℃, the adsorption capacity of converter slag for pure CO2 is higher than that for CO2 in simulated blast furnace gas. At 550 ℃, the uptake for pure CO2 and CO2 in simulated blast furnace gas by the per kilogram converter slag reached the highest, which are 9.339 g and 7.062 g,respectively.