煤气化渣制备碳硅介孔材料及甲基橙吸附性能研究  

Preparation of C-Si mesoporous materials from coal gasification slag and adsorption properties of methyl orange

作　　者：胡崟 莫立焕[1] 李军[1] 熊勤钢 浦丽伟 杨宸懿 陈永发 HU Yin;MO Li-huan;LI Jun;XIONG Qin-gang;PU Li-wei;YANG Chen-yi;CHEN Yong-fa(State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510610,China)

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510610

出　　处：《应用化工》2024年第5期1009-1014,共6页Applied Chemical Industry

基　　金：国家自然科学基金面上项目(22178123);广东省自然科学基金面上项目(2023A1515011419)。

摘　　要：开发了一种煤气化渣低成本制备碳硅介孔材料的方法,探究了影响孔结构的因素和在甲基橙中的吸附性能。采用酸浸法制备碳硅介孔材料,通过材料的孔隙结构和金属氧化物浸出率对制备工艺进行优化。结果表明,温度和时间影响较小,原料粒径和酸浓度影响较大。粒径较小的原料酸浸之后比表面积更大,酸浓度对于碳硅介孔材料的影响比较明显,最佳的酸浓度为16%(质量分数),金属氧化物浸出率和残余碳含量综合影响着比表面积和孔容的大小。煤气化渣基碳硅介孔材料的吸附过程与伪二阶吸附模型最为接近,吸附平衡符合Langmuir模型,对甲基橙最大的吸附量为89.13 mg/g。A low-cost preparation method of carbon silicon mesoporous materials from coal gasification slag was developed,and the factors affecting the pore structure and the adsorption performance in methyl orange were explored.We use the method of acid leaching to prepare carbon silicon mesoporous materials,and optimize the preparation process through the pore structure and metal oxide leaching rate of the materials.The results show that temperature and time have a relatively small impact and raw material particle size and acid concentration have a significant impact.After acid leaching,raw materials with smaller particle sizes have a larger specific surface area,and the acid concentration has a significant impact on carbon silicon mesoporous materials.The optimal acid concentration is 16%.The metal oxide leaching rate and residual carbon content comprehensively affect the specific surface area and pore volume.The adsorption process of carbon silicon mesoporous materials based on coal gasification slag is the closest to the pseudo second order adsorption model,and the adsorption equilibrium conforms to the Langmuir model.The maximum adsorption capacity of methyl orange is 89.13 mg/g.

关 键 词：煤气化渣 碳硅介孔材料 吸附性能 比表面积 金属氧化物浸出率 

分 类 号：TQ546[化学工程—煤化学工程] X705[环境科学与工程—环境工程]