Ethylene(C2H4) and propylene(C3H6),key products of the methanol-to-olefins(MTO) process,are vital chemical feedstocks.However,separating and purifying C3H6/C2H4 mixtures remains highly challeng...Ethylene(C2H4) and propylene(C3H6),key products of the methanol-to-olefins(MTO) process,are vital chemical feedstocks.However,separating and purifying C3H6/C2H4 mixtures remains highly challenging due to their similar physicochemical properties.Through the mixed-ligand strategy with both N,N'-bis(3,5-dicarboxyphenyl)-oxalamide(H4BDPO) and either 4,4'-bipyridine(bpy) or di(pyridin-4-yl)amine(dpa),respectively,two novel amide-functionalized MOFs,[Cu6(BDPO)3(bpy)2(H2O)]·xsolvent(NJTU-Bai85,NJTU-Bai=Nanjing Tech University Bai's group) and [Cu6(BDPO)3(dpa)2(H2O)]·xsolvent(NJTU-Bai86) were synthesized with high C3H6 capacities(181 and 191 cm3 g-1 at 298 K and 1 bar,respectively) and exceptional C3H6/C2H4 selectivity(9.5 and 9.2,respectively),even at elevated temperatures.Furthermore,dynamic breakthrough experiments demonstrate that C3H6/C2H4 mixture(50/50,20/50,and 10/90,v/v) can be effectively separated in one step and obtain polymer-grade C2H4(≥99.5%) with ultra-high productivity(137 and 133 L kg-1,respectively) at 298 K and very interestingly,the MOF-packed separation column shows markedly distinct retention times for C2H4 and C3H6,highlighting their potential for industrial gas separation application.展开更多
研究了特殊形貌Ni O对基于该类敏感电极的混合电位C3H6传感器的影响,实验数据显示:线型结构Ni O敏感电极传感器在600℃下具有最好的响应值,达到了60 m V,其90%的响应和恢复分别为15,25 s。此传感器在600℃对0%~0.05%C3H6具有较好敏感性...研究了特殊形貌Ni O对基于该类敏感电极的混合电位C3H6传感器的影响,实验数据显示:线型结构Ni O敏感电极传感器在600℃下具有最好的响应值,达到了60 m V,其90%的响应和恢复分别为15,25 s。此传感器在600℃对0%~0.05%C3H6具有较好敏感性能,且响应信号与气体体积分数对数之间有良好的线性关系,其灵敏度达-50.26 m V/decade。经气相催化分析,在400~600℃和0.01%C3H6下,线型形貌Ni O电极的平均气相催化效率最低,为31.4%(其余两种分别为42.7%,52.4%),进而表现最优的传感器性能。展开更多
基金financially supported by the National Natural Science Foundation of China(No.22271150)
摘要Ethylene(C2H4) and propylene(C3H6),key products of the methanol-to-olefins(MTO) process,are vital chemical feedstocks.However,separating and purifying C3H6/C2H4 mixtures remains highly challenging due to their similar physicochemical properties.Through the mixed-ligand strategy with both N,N'-bis(3,5-dicarboxyphenyl)-oxalamide(H4BDPO) and either 4,4'-bipyridine(bpy) or di(pyridin-4-yl)amine(dpa),respectively,two novel amide-functionalized MOFs,[Cu6(BDPO)3(bpy)2(H2O)]·xsolvent(NJTU-Bai85,NJTU-Bai=Nanjing Tech University Bai's group) and [Cu6(BDPO)3(dpa)2(H2O)]·xsolvent(NJTU-Bai86) were synthesized with high C3H6 capacities(181 and 191 cm3 g-1 at 298 K and 1 bar,respectively) and exceptional C3H6/C2H4 selectivity(9.5 and 9.2,respectively),even at elevated temperatures.Furthermore,dynamic breakthrough experiments demonstrate that C3H6/C2H4 mixture(50/50,20/50,and 10/90,v/v) can be effectively separated in one step and obtain polymer-grade C2H4(≥99.5%) with ultra-high productivity(137 and 133 L kg-1,respectively) at 298 K and very interestingly,the MOF-packed separation column shows markedly distinct retention times for C2H4 and C3H6,highlighting their potential for industrial gas separation application.
摘要研究了特殊形貌Ni O对基于该类敏感电极的混合电位C3H6传感器的影响,实验数据显示:线型结构Ni O敏感电极传感器在600℃下具有最好的响应值,达到了60 m V,其90%的响应和恢复分别为15,25 s。此传感器在600℃对0%~0.05%C3H6具有较好敏感性能,且响应信号与气体体积分数对数之间有良好的线性关系,其灵敏度达-50.26 m V/decade。经气相催化分析,在400~600℃和0.01%C3H6下,线型形貌Ni O电极的平均气相催化效率最低,为31.4%(其余两种分别为42.7%,52.4%),进而表现最优的传感器性能。