Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163952 - 163952
Published: May 1, 2025
Language: Английский
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 26, 2025
Abstract Research over the years has revealed immense potential of metal–organic frameworks (MOFs) for purifying olefins such as ethylene (C 2 H 4 ) and propylene 3 6 ). However, many these MOFs face challenges in terms economic viability, particularly production scalability, long‐term stability, process capability. In this study, we present a low‐cost easily scalable synthesis robust MOF material (JNU‐74a), featuring balanced surface polarity that allows one‐step C purification from methanol‐to‐olefin (MTO) products. By incorporating highly electronegative atoms on nonpolar surface, JNU‐74a exhibits substantially larger absorption capacity stronger binding affinity ethane compared to , evidenced by their gas adsorption isotherms heats measurements. In‐depth analyses through situ single‐crystal X‐ray diffraction (SCXRD) gas@JNU‐74a unveil multiple supramolecular bindings favor confirming preferential . Breakthrough experiments demonstrate can efficiently produce polymer‐grade (≥99.95%) (≥99.5%) /C mixtures different ratios single adsorption‐desorption cycle. With its impressive separation capability, high chemical cost‐effective production, holds promise olefin MTO products other challenging industrial separations.
Language: Английский
Citations
2
Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown
Published: March 24, 2025
Abstract Selective paraffin adsorption is crucial in chemical processes but faces significant challenges. Herein a promising strategy by maximizing the density of π‐electron (D π defined to be Number (π‐electron) /Volume (single pore) ) metal‐organic framewok (MOF) pore proposed boost separation. SNNU‐126 features triangular prismatic with highest D value 0.2070 e Å −3 selected and rationally regulated incorporating amino electron‐donating groups (EDGs) demonstrate feasibility this strategy. As expected, extraordinary together multiple EDGs endow SNNU‐126‐129 top‐level capacity, exceptional IAST selectivity, excellent separation ability as well productivity. Specially, SNNU‐129 nine demonstrates longest breakthrough interval times for C 2 H 6 /CH 4 (205 min g −1 3 8 (710 from ternary gas mixture one‐step CH productivity 15.56 mmol (purity > 99.5%) at 298 K 1 bar, which surpass values all current adsorbents set benchmark In situ infrared spectra DFT simulations clearly verify that MOF effectively enlarges C─H···π interactions, widens affinity gap, results performance.
Language: Английский
Citations
0
Small, Journal Year: 2025, Volume and Issue: unknown
Published: May 15, 2025
Abstract Ethylene and propylene are important raw chemicals that in high demand. Methanol‐to‐olefins (MTO) is a promising alternative approach for producing ethylene from non‐petroleum feedstocks, which the separation of propylene/ethylene particularly crucial. In this study, metal azolate framework (MAF) [Zn 7 ( μ ‐H 2 O)(tppa) 4 (HCOO) ] (MAF‐68, where H 3 tppa = tris(4‐(1‐(tetrahydro‐2 ‐pyran‐2‐yl)‐1 ‐pyrazol‐4‐yl)phenyl)amine) has been synthesized with rare zinc pyrazolate chains comprising O bridges, namely Zn O)(Rpz) 12 (Rpz − denotes groups), mixtures. Sorption experiments indicated MAF‐68 shows remarkable uptake 4.19 mmol g −1 (at 10 kPa), significantly higher than those many other reported porous materials C 6 /C separation. also selectivity 9.5 2/5 . Breakthrough further confirm potential material high‐purity (99.9999%) (99.9999%).
Language: Английский
Citations
0
Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163952 - 163952
Published: May 1, 2025
Language: Английский
Citations
0