Robust Two-Dimensional Hydrogen-Bonded Organic Framework for Efficient Separation of C1–C3 Alkanes
Yunzhe Zhou, Yongqin Zhu, Danhua Song, Zhenyu Ji, Cheng Chen, Mingyan Wu
Abstract
High Resolution Image Download MS PowerPoint Slide Separating natural gas to obtain high-quality C1–C3 alkanes is an imperative process for supplying clean energy sources and high valued petrochemical feedstocks. However, developing adsorbents which can efficiently distinguish CH 4, C 2 H 6, and C 3 H 8 molecules remains challenging. We herein report an ultra-stable layered hydrogen-bonded framework (HOF-NBDA), which features differential affinities and adsorption capacities for CH 4, C 2 H 6, and C 3 H 8 molecules, respectively. Breakthrough experiments on ternary component gas mixture show that HOF-NBDA can achieve efficient separation of CH 4 /C 2 H 6 /C 3 H 8 (v/v/v, 85/7.5/7.5). More importantly, HOF-NBDA can realize efficient C 3 H 8 recovery from ternary CH 4 /C 2 H 6 /C 3 H 8 gas mixture. After one cycle of breakthrough, 70.9 L·kg –1 of high-purity (≥ 99.95%) CH 4 and 54.2 L·kg –1 of C 3 H 8 (purity ≥99.5%) could be obtained. Furthermore, excellent separation performance under different flow rates, temperatures, and humidities could endow HOF-NBDA an ideal adsorbent for the future natural gas purification.