摘要
利用硝酸铟和酰胺三酸配体H3L,以硝酸作为模板剂,采用溶剂热法制备出三种朝向的链基有机骨架材料——3W-ROD-1.该材料具有永久孔隙结构,表现出较高比表面积达2742m2/g,孔体积为1.11cm3/g.由于其独特的结构特征,在298K、1bar条件下,研究了3W-ROD-1对丙烷、乙烷、甲烷的气体吸附.其中,3W-ROD-1对丙烷、乙烷、甲烷吸附量分别为8.74mmol/g、3.62mmol/g、0.44mmol/g,丙烷吸附量在同类材料中位居前列.通过理想吸附溶液理论(IAST)选择性计算得出,在298K、1bar条件下,C3H8/CH4和C2H6/CH4的吸附选择性分别为87.0(C3H8∶CH4=15∶85)和9.5(C2H6∶CH4=15∶85).动态穿透分离实验进一步验证了其对丙烷/甲烷、乙烷/甲烷、丙烷/乙烷/甲烷混合体系具有良好的分离性能,在丙烷/乙烷/甲烷(体积比5∶10∶85)三组分分离中,丙烷、乙烷和甲烷的突破时间分别为50min、11.5min和3min.结果表明该材料在天然气纯化方面具有潜在的应用价值.
Abstract
Three-way rod metal-organic framework—3W-ROD-1 was prepared by solvothermal method using In(NO3)3·4H2O and H3L,with nitric acid serving as the template.This material possessed a permanent pore structure and exhibited a relatively high specific surface area,reaching up to 2742m2/g,along with a pore volume of 1.11cm3/g.Owing to its unique structural characteristics,the adsorption capacity of 3W-ROD-1 for propane,ethane,and methane were 8.74mmol/g,3.62mmol/g,and 0.44mmol/g,respectively.Notably,the adsorption capacity of propane ranked at the forefront among similar materials.Through IAST(ideal adsorption solution theory)selective calculation,the adsorption selectivities of C3H8/CH4,C2H6/CH4 at 298K and 1bar were calculated to be 87.0(C3H8∶CH4=15∶85)and 9.5(C2H6∶CH4=15∶85),respectively.Dynamic breakthrough separation experiments further verified its excellent separation performance for the propane/methane,ethane/methane,and propane/ethane/methane mixed systems.In the three components separation of propane/ethane/methane(V/V/V=5/10/85),the breakthrough times were 50min,11.5min and 3min,respectively.These findings convincingly demonstrated the potential application value of this material in the field of natural gas purification.
基金项目
国家自然科学基金(22301212)
山西省基础研究计划青年项目(202203021222194)
太原科技大学博士科研启动基金(20222066)
来晋优秀博士奖励项目(20232061)
国家科技期刊平台
NSTL
万方数据