莲杆基生物炭吸附CO_(2)的性能研究

Study on CO_(2) Adsorption Performance of Sugarcane-based Activated Carbon

以莲杆为前驱体,制备了莲杆基生物炭,采用BET、TG进行了表征分析,通过吸附实验,探究了不同条件下生物炭对CO_(2)的吸附性能。结果表明,碳化过程中,升温速率、碳化温度对生物炭的比表面积、孔体积有较大影响,5℃·min^(-1)的升温速率下,1000℃下碳化的生物炭的比表面积最大,达378m^(2)·g^(-1)。低温、低流速有利于CO_(2)的吸附,30℃、50mL·min^(-1)条件下,生物炭的吸附量可达74.98mg·g^(-1)。

Applied lotus root as precursor,lotus root-based biochar was prepared and characterized by BET and TG.Through the adsorption experiments,the CO_(2) adsorption performance under different conditions was investigated.The results showed that in the carbide process,the heating rate and the carbonization temperature had a great influence on the specific surface area and pore volume of biochar.With the heating rate of 5℃/min,the largest specific surface area of biochar was up to 378m^(2)/g under 1000℃.Low temperature and low flow rate was benefit for the CO_(2) adsorption of biochar.Under the condition of 30℃ and 50mL/min,the biochar adsorption capacity was up to 74.98 mg/g.