Green and Scalable Preparation of an Isomeric CALF-20 Adsorbent with Tailored Pore Size for Molecular Sieving of Propylene from Propane.

IF 10.7 2区 材料科学 Q1 CHEMISTRY, PHYSICAL
Small Methods Pub Date : 2025-01-01 Epub Date: 2024-07-29 DOI:10.1002/smtd.202400838
Zhenning Deng, Longsheng Yang, Hanting Xiong, Junhui Liu, Xing Liu, Zhenyu Zhou, Shixia Chen, Yanan Wang, Hao Wang, Jingwen Chen, Shuguang Deng, Banglin Chen, Jun Wang
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引用次数: 0

Abstract

Molecular sieving of propylene (C3H6) from propane (C3H8) is highly demanded for C3H6 purification. However, delicate control over aperture size to achieve both high C3H6 uptake and C3H6/C3H8 selectivity with low cost remains a significant challenge. Herein, a green and scalable approach is reported for preparing an isomeric CALF-20 adsorbent, termed as NCU-20, using water as the only solvent with a cost of $10 per kilogram. NCU-20 features a contracted pore size (4.2 × 4.7 Å2) compared to CALF-20 (5.2 × 5.7 Å2), which enables molecular sieving of C3H6 (4.16 × 4.65 Å2) from C3H8 (4.20 × 4.80 Å2). Notably, NCU-20 exhibits record-high C3H6 adsorption capacity (94.41 cm3 cm-3) at 298 K and 1.0 bar, outperforming all C3H6/C3H8 molecular sieving adsorbents. The sieving performances of C3H6/C3H8 are well maintained at elevated temperatures. Therefore, a delicate balance between C3H6 adsorption capacity (91.62 cm3 cm-3) and C3H6/C3H8 selectivity (uptake ratio of 22.2) is obtained on NCU-20 at 298 K and 0.5 bar. Furthermore, dynamic breakthrough experiments demonstrate a high productivity of 65.39 cm3 cm-3 for high-purity C3H6 (>99.5%) from an equimolar C3H6/C3H8 gas-mixture.

Abstract Image

绿色、可扩展地制备具有定制孔径的异构 CALF-20 吸附剂,用于分子筛分丙烷中的丙烯。
从丙烷(C3H8)中分离丙烯(C3H6)的分子筛在 C3H6 纯化方面需求量很大。然而,如何精细控制孔径大小,以低成本实现高 C3H6 吸收率和 C3H6/C3H8 选择性,仍然是一项重大挑战。本文报告了一种绿色、可扩展的方法,即使用水作为唯一溶剂,以每公斤 10 美元的成本制备异构 CALF-20 吸附剂(称为 NCU-20)。与 CALF-20(5.2 × 5.7 Å2)相比,NCU-20 的孔径更小(4.2 × 4.7 Å2),因此能对 C3H6(4.16 × 4.65 Å2)和 C3H8(4.20 × 4.80 Å2)进行分子筛分。值得注意的是,在 298 K 和 1.0 bar 条件下,NCU-20 对 C3H6 的吸附容量(94.41 cm3 cm-3)创下历史新高,优于所有 C3H6/C3H8 分子筛吸附剂。C3H6/C3H8 的筛分性能在高温下也能保持良好。因此,在 298 K 和 0.5 巴的条件下,NCU-20 在 C3H6 吸附能力(91.62 cm3 cm-3)和 C3H6/C3H8 选择性(吸收比为 22.2)之间取得了微妙的平衡。此外,动态突破实验表明,从等摩尔 C3H6/C3H8 混合气体中提取高纯度 C3H6(>99.5%)的生产率高达 65.39 cm3 cm-3。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Small Methods
Small Methods Materials Science-General Materials Science
CiteScore
17.40
自引率
1.60%
发文量
347
期刊介绍: Small Methods is a multidisciplinary journal that publishes groundbreaking research on methods relevant to nano- and microscale research. It welcomes contributions from the fields of materials science, biomedical science, chemistry, and physics, showcasing the latest advancements in experimental techniques. With a notable 2022 Impact Factor of 12.4 (Journal Citation Reports, Clarivate Analytics, 2023), Small Methods is recognized for its significant impact on the scientific community. The online ISSN for Small Methods is 2366-9608.
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