Details

Autor(en) / Beteiligte

• Liu, Junhui
• Xiong, Hanting
• Shuai, Hua
• Liu, Xing
• Peng, Yong
• Wang, Lingmin
• Wang, Pengxiang
• Zhao, Zhiwei
• Deng, Zhenning
• Zhou, Zhenyu
• Chen, Jingwen
• Chen, Shixia
• Zeng, Zheling
• Deng, Shuguang
• Wang, Jun

Titel

Molecular sieving of iso-butene from C4 olefins with simultaneous high 1,3-butadiene and n-butene uptakes

Ist Teil von

• Nature communications, 2024-03, Vol.15 (1), p.2222-2222, Article 2222

Ort / Verlag

London: Nature Publishing Group UK

Erscheinungsjahr

2024

Quelle

Electronic Journals Library

Beschreibungen/Notizen

• Iso-butene (iso-C 4 H 8 ) is an important raw material in chemical industry, whereas its efficient separation remains challenging due to similar molecular properties of C 4 olefins. The ideal adsorbent should possess simultaneous high uptakes for 1,3-butadiene (C 4 H 6 ) and n-butene (n-C 4 H 8 ) counterparts, endowing high efficiency for iso-C 4 H 8 separation in adsorption columns. Herein, a sulfate-pillared adsorbent, SOFOUR-DPDS-Ni (DPDS = 4,4′-dipyridyldisulfide), is reported for the efficient iso-C 4 H 8 separation from binary and ternary C 4 olefin mixtures. The rigidity in pore sizes and shapes of SOFOUR-DPDS-Ni exerts the molecular sieving of iso-C 4 H 8 , while exhibiting high C 4 H 6 and n-C 4 H 8 uptakes. The benchmark Henry’s selectivity for C 4 H 6 /iso-C 4 H 8 (2321.8) and n-C 4 H 8 /iso-C 4 H 8 (233.5) outperforms most reported adsorbents. Computational simulations reveal the strong interactions for C 4 H 6 and n-C 4 H 8 . Furthermore, dynamic breakthrough experiments demonstrate the direct production of high-purity iso-C 4 H 8 (>99.9%) from C 4 H 6 /iso-C 4 H 8 (50/50, v / v ), n-C 4 H 8 /iso-C 4 H 8 (50/50, v / v ), and C 4 H 6 /n-C 4 H 8 /iso-C 4 H 8 (50/15/35, v / v / v ) gas-mixtures. The efficient separation of iso-butene, an important raw material in chemical industry, remains challenging due to similar molecular properties of C 4 olefins. Here, the authors report a sulfate-pillared adsorbent for the molecular sieving of iso-C 4 H 8 from C 4 H 6 and n-C 4 H 8 with good benchmark uptake ratios and Henry’s selectivities.