MIL-101(Cr)@SBA-15复合材料制备及其吸附金属矿山CO_(2)特性研究  

Preparation of MIL-101(Cr)@SBA-15 Composite Material and Its Adsorption Characteristics of CO_(2)in Metal Mine

作　　者：范文涛 杨思奥 朱泉霖 牟宏伟 张永亮 FAN Wentao;YANG Si’ao;ZHU Quanlin;MU Hongwei;ZHANG Yongliang(School of Environmental and Municipal Engineering,Qingdao University of Technology,Qingdao 266520,Shandong,China;Mining Management Branch of Shandong Gold Mining Co.,Ltd.,Jinan 250000,Shandong,China;School of Safety and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,Shandong,China)

机构地区：[1]青岛理工大学环境与市政工程学院,山东青岛266520 [2]山东黄金矿业股份有限公司矿业管理分公司,山东济南250000 [3]山东科技大学安全与环境工程学院,山东青岛266590

出　　处：《黄金科学技术》2025年第1期173-183,共11页Gold Science and Technology

基　　金：国家自然科学基金项目“金属矿深开采热—质协同效应对通风阻力的影响机制研究”(编号:52374209);山东省自然科学基金项目“滨海金属矿深开采条件热—质协同效应对通风阻力影响机制研究”(编号:ZR2023ME012);“激发应力波在煤岩损伤失稳过程中的能量衰减机制”(编号:ZR2023QE080);山东省高等学校优秀青年创新团队项目“矿山深井围岩非稳态温度场演化规律及其对巷道环境影响研究”(编号:2019KJH008)联合资助。

摘　　要：为实现“双碳”目标,建设低碳环保的绿色矿山体系,通过原位合成法成功地组装了一种由MIL-101和介孔二氧化硅组成的新型杂化材料,并研究其CO_(2)吸附性能和应用效果。试验结果表明:SBA-15与MIL-101复合并未改变彼此的基本结构,如骨架构型和孔道结构等;SBA-15中均匀细长孔道的引入可以增大孔容和孔径,复合材料的孔容由MOF基材料的0.428 cm^(3)/g增加至0.54 cm^(3)/g,平均孔径由3.059 nm增加至7.817 nm;在温度为298 K和压力为100 kPa的条件下,复合材料具有1.53962 mmol/g的吸附容量,对纯CO_(2)气体具有良好的存储能力;由于复合材料表面吸附能的非均匀分布,相比Langmuir方程,Freundlich方程能够更好地描述吸附结果,其R2值为0.9997,说明材料发生的吸附行为符合非均匀表面上的多层非理想吸附行为;材料经5次循环后的吸附量最大差值小于3%,说明其可以经过温和条件处理后循环使用,且在工程应用中具有良好的效果。To achieve the“dual carbon”goals and establish a green mining system characterized by low carbon emissions and environmental sustainability,a new hybrid material composed of MIL-101 and mesoporous silica was successfully synthesized using an in-situ method.This study investigates the CO_(2)adsorption performance and application potential of the material.By employing SBA-15 with ordered mesopores as a structural guiding agent,the directional growth of MIL-101 crystals was controlled,thereby restricting the expansion of the skeleton.Consequently,a comprehensive microporous/mesoporous hierarchical composite was obtained.The crystalline properties,microstructure,and pore architecture of the composites were examined using X-ray diffraction(XRD),scanning electron microscopy(SEM),and nitrogen adsorption desorption analysis.The experimental findings indicate that the integration of the two compounds does not alter their fundamental structures,including the skeletal configuration and pore structure.Notably,the pore volume of the composite increased from 0.428 cm^(3)/g to 0.540 cm^(3)/g,and the average pore size expanded from 3.059 nm to 7.817 nm,attributed to the introduction of uniformly slender pore channels within the SBA-15 framework.Under the conditions of 298 K and 100 kPa,the composite exhibited an adsorption capacity of 1.53962 mmol/g,demonstrating a substantial storage capability for pure CO_(2)gas.Compared with MOFs monomer material,the mass transfer rate of the composite material increased significantly,from 1.860×10^(-6) mmol·m^(-3)·s^(-1) to 1.159×10^(-5) mmol·m^(-3)·s^(-1).Due to the heterogeneous distribution of adsorption energy on the surface of the composite material,the Freundlich equation provides a more accurate representation of the adsorption results compared to the Langmuir equation.The correlation coefficient(R²)of 0.9997 suggests that the adsorption behavior of the material aligns with multi-layer,non-ideal adsorption on a heterogeneous surface.Furthermore,the maximum variation in adso

关 键 词：金属有机骨架 介孔二氧化硅 协同作用 CO_(2)捕获 吸附等温线 复合材料 

分 类 号：X936[环境科学与工程—安全科学]