Screening of pure silica zeolites with high ethane/ethylene separation selectivity by simulations and experiments

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2024-12-13 DOI:10.1002/aic.18676

Peixin Zhang, Jianbo Hu, Dengzhuo Zhou, Xiaofei Lu, Lifeng Yang, Liyuan Chen, Xian Suo, Xili Cui, Huabin Xing

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引用次数: 0

Abstract

The advancement of ethane (C₂H₆)-selective materials offers the potential for developing energy-efficient adsorptive separation processes to obtain high-purity ethylene (C₂H₄) directly. However, these materials still suffer challenges of low selectivity, high cost, and poor stability. Herein, we presented a commercially scalable and stable MFI topology zeolite material (TS-1) with excellent ideal adsorption solution theory (IAST) selectivity (2.07) and separation potential (0.64 mmol g⁻¹). Polymer-grade ethylene (99.9%) could be afforded with the productivity of 11.5 L kg⁻¹ through the adsorption column packed with TS-1 material. Additionally, pure silica zeolite with DOH topology with excellent IAST selectivity (2.93) and separation potential (1.64 mmol g⁻¹) was discovered by high-throughput screening via the combination of experiments and simulations. These findings highlight that pure silica zeolites hold promise as C₂H₆-selective adsorbents for large-scale implementation for one-step C₂H₄ purification.

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通过模拟和实验筛选具有高乙烷/乙烯分离选择性的纯硅分子筛

乙烷（C2H6）选择性材料的进展为开发节能吸附分离工艺直接获得高纯度乙烯（C2H4）提供了可能。然而，这些材料仍然面临着选择性低、成本高、稳定性差的挑战。在此，我们提出了一种商业可扩展和稳定的MFI拓扑分子筛材料（TS-1），具有优异的理想吸附溶液理论（IAST）选择性（2.07）和分离电位（0.64 mmol g−1）。采用TS-1填料的吸附柱，可获得99.9%的聚合物级乙烯，产率为11.5 L kg−1。此外，通过实验和模拟相结合的高通量筛选，发现了具有DOH拓扑结构的纯二氧化硅分子筛，具有良好的IAST选择性（2.93）和分离电位（1.64 mmol g−1）。这些发现表明，纯硅沸石有望作为c2h6选择性吸附剂大规模实施一步提纯C2H4。

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

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

期刊介绍： The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering. The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field. Articles are categorized according to the following topical areas: Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food Inorganic Materials: Synthesis and Processing Particle Technology and Fluidization Process Systems Engineering Reaction Engineering, Kinetics and Catalysis Separations: Materials, Devices and Processes Soft Materials: Synthesis, Processing and Products Thermodynamics and Molecular-Scale Phenomena Transport Phenomena and Fluid Mechanics.