تقرير
A gating ultramicroporous metal-organic framework showing high adsorption selectivity, capacity and rate for xylene separation
| العنوان: | A gating ultramicroporous metal-organic framework showing high adsorption selectivity, capacity and rate for xylene separation |
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| المؤلفون: | Ye, Zi-Ming, Zhang, Xue-Feng, Liu, De-Xuan, Xu, Yan-Tong, Wang, Chao, Zheng, Kai, Zhou, Dong-Dong, He, Chun-Ting, Zhang, Jie-Peng |
| بيانات النشر: | SCIENCE PRESS |
| سنة النشر: | 2022 |
| المجموعة: | Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR / 中国科学院广州能源研究所机构知识库 |
| مصطلحات موضوعية: | metal-organic frameworks, gating, xylene, adsorption, separation, LIQUID-PHASE, P-XYLENE, ISOMERS, ZEOLITE, ENERGY, Chemistry, Multidisciplinary |
| الوصف: | Adsorptive separation of p-xylene (pX) from xylene isomers is a key process in chemical industry, but known adsorbents cannot simultaneously achieve high adsorption selectivity, capacity, and rate. Here, we demonstrate gating ultramicropore as a solution for this challenge. Slight modification of the synthetic condition gives rise to isomeric metal-organic frameworks alpha-[Zn(pba)] (MAF-88, H(2)pba = 4-(1H-pyrazol-4-yl)benzoic acid) and beta-[Zn(pba)] (MAF-89) possessing similar pillared-column structures, porosities, and high pX capacities of 2.0 mmol g(-1), but very different framework/pore topologies, pore sizes, and pX selectivities. For binary and ternary mixtures of liquid xylene isomers, MAF-88 with narrow one-dimensional (1D) channels shows pX selectivity of 11 and 1.6, while MAF-89 with 3D-connected quasi-discrete pores shows pX selectivity up to 221 and 46, respectively. Thermogravimetry, differential scanning calorimetry, and time-dependent separation experiments reveal that the kinetic effects of the gating pores play more important roles than the thermodynamic effects, which is further confirmed by single-crystal X-ray diffraction and computational simulations. |
| نوع الوثيقة: | report |
| اللغة: | English |
| العلاقة: | SCIENCE CHINA-CHEMISTRY; http://ir.giec.ac.cn/handle/344007/37047Test |
| DOI: | 10.1007/s11426-022-1304-1 |
| الإتاحة: | https://doi.org/10.1007/s11426-022-1304-1Test http://ir.giec.ac.cn/handle/344007/37047Test |
| رقم الانضمام: | edsbas.96FD6971 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1007/s11426-022-1304-1 |
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