水蒸气调控对沥青基活性炭结构及吸附性能的影响
文锡量 , 关微 , 宋帅超 , 程俊霞 , 朱亚明 , 赖仕全 , 赵雪飞
现代化工 ›› 2026, Vol. 46 ›› Issue (6) : 86 -92.
水蒸气调控对沥青基活性炭结构及吸附性能的影响
Effect of steam regulation on the structure and adsorption performance of pitch-based activated carbon
以乙烯焦油沥青(ETP)为碳源,聚乙二醇(PEG)为粘结剂,通过水蒸气活化法制备各向同性球形活性炭,系统研究水蒸气流量对材料结构及甲醇吸附性能的影响。实验表明,1.5 mL/min水蒸气流量下制备的活性炭甲醇平衡吸附量达 357.8 mg/g(较未活化样品提升4.5倍),归因于其高度无序的石墨微晶结构(d002>0.4 nm)增加吸附位点。动力学分析显示,吸附符合物理-化学复合机制(R2>0.999),且经5次循环后仍保持80%初始容量,证实其优异的再生性与结构稳定性。该研究为高效VOCs吸附材料设计提供理论支撑。
Spherical isotropic activated carbons were prepared using ethylene tar pitch (ETP) as the carbon precursor and polyethylene glycol (PEG) as the binder via steam activation.The effects of steam flow rate on the structural evolution and methanol adsorption performance of the materials were systematically investigated.Experimental results showed that the sample activated at a steam flow rate of 1.5 mL/min exhibited a methanol equilibrium adsorption capacity of 357.8 mg/g,which is 4.5 times higher than that of the non-activated sample.This enhancement is attributed to the increased number of accessible adsorption sites resulting from the formation of highly disordered graphite microcrystalline structures (d002>0.4 nm).Kinetic analysis indicated that the adsorption process followed a physicochemical composite mechanism with a correlation coefficient (R2) greater than 0.999.Moreover,the activated carbon retained over 80% of its initial adsorption capacity after five adsorption-regeneration cycles,demonstrating excellent regeneration performance and structural stability.This study provides theoretical support for the design of efficient VOCs adsorption materials.
球形活性炭 / VOCs / 水蒸气活化 / 结构调控 / 再生性能
spherical activated carbon / VOCs / steam activation / structural regulation / regeneration performance
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国家自然科学青年基金项目(22208138)
辽宁省教育厅高校基本科研项目(LJ212410146018)
辽宁省教育厅高校基本科研项目(LJ222410146051)
2024年辽宁科技大学研究生科技创新项目(LKDYC202416)
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