Article
Engineering, Chemical
Yunlu Li, Liyuan Li, Hongliang Zhao, Jichang Liu, Kake Zhu
Summary: Researchers have discovered that functionalizing the surface of mesoporous silica MCM-41 can immobilize Ag+ on the material, transforming it from an unselective porous solid into an olefin selective molecular sieve material suitable for liquid phase binary mixture separations. Results show that ionically anchored Ag+ with intact complexation orbitals outperform coordinatively immobilized Ag+ in terms of antileaching property, olefin separation factor, and recyclability. The use of small mesopore size can boost olefin adsorption selectivity by compressing the available space for access of paraffins.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Review
Multidisciplinary Sciences
Dipendu Saha, Min-Bum Kim, Alexander J. Robinson, Ravichandar Babarao, Praveen K. Thallapally
Summary: This review discusses different mechanisms for separating olefins by adsorption, including affinity-based separation, separation based on pore size and shape, and non-equilibrium separation. Adsorption as a novel, sustainable, and inexpensive separation strategy requires the design of suitable adsorbents.
Article
Chemistry, Multidisciplinary
Yanwei Sun, Shen Hu, Jiahui Yan, Taotao Ji, Liangliang Liu, Mingming Wu, Xinwen Guo, Yi Liu
Summary: A highly efficient molecular sieve membrane for ethylene/ethane and flue gas separation has been developed through structure optimization strategy.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Engineering, Chemical
Kun Yang, Yujie Ban, Weishen Yang
Summary: This study introduces layered MOF membranes modified with ionic liquid/AgBF4 composite for olefin/paraffin separation, showing impressive separation performances for mixed gases.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Won Hee Lee, Jong Geun Seong, Joon Yong Bae, Ho Hyun Wang, Sun Ju Moon, Jun Tae Jung, Yu Seong Do, Hoseong Kang, Chi Hoon Park, Young Moo Lee
Summary: The study demonstrates the development of nanoporous and rigid semi interpenetrating polymer networks (SIPNs) with enhanced gas transport efficiency and improved resistance to plasticization against condensable gases. The optimization of microporous structure by incorporating crosslinked networks into polymer matrices shows wide applicability of polymer membranes for aggressive gas separations.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Engineering, Chemical
Mi Xu, Haozhen Dou, Feifei Peng, Na Yang, Xiaoming Xiao, Xiaowei Tantai, Yongli Sun, Bin Jiang, Luhong Zhang
Summary: This study develops stable copper-decorated deep eutectic solvent based supported liquid membranes (Cu-DESMs) for efficient ethylene/ethane separation, which exhibit high permeability and selectivity, along with long-term stability.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Masahide Tominaga, Sana Kondo, Tadashi Hyodo, Masatoshi Kawahata, Kentaro Yamaguchi
Summary: Three diimide-based macrocycles were used as hosts to create inclusion crystals containing various liquid halocarbons, showing different intermolecular interactions.
Article
Engineering, Chemical
Yingying Cao, Xin Tan, Guoxiong Zhan, Qiongguang Li, Hui Wang, Zengxi Li
Summary: This study proposed the use of ionic liquids (ILs) for the selective separation of natural analogues artemisitene and artemisinin. The aqueous solution of N-allyl-N,N,N-trimethylammonium chloride ([AA][Cl]) exhibited excellent capability for this separation, with a separation selectivity of 12.23 under optimal conditions. π-π complexation between artemisitene and [AA][Cl] played a major role in the separation process, and counter-flow extraction showed advantages in energy consumption and product yield compared to multistage cross-flow extraction.
Article
Chemistry, Physical
Kyung Ho Cho, Ji Woong Yoon, Jeong Hyeon Lee, Jin Chul Kim, Kiwoong Kim, U-Hwang Lee, Minkee Choi, Sang Kyu Kwak, Jong-San Chang
Summary: This study investigates preferential ethane adsorption in ethane/ethylene mixtures using MIL-53 isomorphs with different organic linkers, revealing that MIL-53-NDCA exhibits promising C2H6/C2H4 separation properties. Molecular simulations suggest that efficient C-H···π interactions contribute to the good separation performance of MIL-53-NDCA. In breakthrough experiments, MIL-53-NDCA successfully separates a 50/50 v/v C2H6/C2H4 mixture into high-purity ethylene with high ethylene productivity.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Article
Chemistry, Physical
Chunli Xu, Zhifeng Yang, Lei Shi, Yu Yin, Min Lu, Mengxuan Liu, Aihua Yuan, Hong Wu, Xiao-Ming Ren, Shaobin Wang, Hongqi Sun
Summary: Adsorbents based on CuI for p-complexative separation of C2H4/C2H6 have attracted widespread interests. However, challenges remain in terms of low separation efficiency and poor stability. In this study, a novel CuCoM-DS adsorbent with superior performance in C2H4/C2H6 separation was successfully synthesized by encapsulating active Cu and auxiliary Co species within the nanopores of MIL-101 using a double-solvent method. The best sample 1.5CuCoM-DS exhibited high C2H4 adsorption capacity and selectivity, maintaining over 90% of fresh C2H4 uptake after exposure to air for 12 days.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Ling Zhang, Ke Jiang, Lifeng Yang, Libo Li, Enlai Hu, Ling Yang, Kai Shao, Huabin Xing, Yuanjing Cui, Yu Yang, Bin Li, Banglin Chen, Guodong Qian
Summary: By using copper(I)-alkynyl chemistry within an ultra-microporous MOF, the researchers achieved ultrahigh C2H2/CO2 separation selectivity with a record high C2H2/CO2 selectivity of 185. The specific interaction between Cu-I ions and C2H2 through pi-complexation played a key role in the exceptional separation performance. This work suggests a new perspective on functionalizing MOFs for selective separation of C2H2 over CO2.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Applied
Jung Gi Min, K. Christian Kemp, Kevin S. Kencana, Suk Bong Hong
Summary: Ag-CHA-6.0, with a Si/Al ratio of 6.0, shows comparable N-2/O-2 separation performance to Li-X but higher CO2 resistance under simulated conditions. Its excellent separation performance may be attributed to the intrazeolitic formation of partially charged silver clusters (Ag-n(delta+)) within the CHA framework upon activation.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Review
Engineering, Chemical
Fahmi Anwar, Maryam Khaleel, Kean Wang, Georgios N. Karanikolos
Summary: Ethylene, a crucial feedstock for key compounds like polymers, is mainly produced from naphtha steam cracking, but unwanted traces of ethane are present. Energy-intensive methods are used to obtain pure ethylene, making the development of materials for ethylene-ethane separation by adsorption important yet challenging due to the compounds' similar properties.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Biochemical Research Methods
Donghyun Ryoo, Philip Eor, Jason E. Bara, Jared L. Anderson
Summary: Silver(I) ions have been utilized in the separation of olefins from paraffins by incorporating them into polymer membranes or ionic liquids (ILs). It was found that olefins were highly retained by silver(I) ions in polymeric ionic liquids (PILs) compared to ILs, and this retention increased with higher concentration of silver(I) salt in the stationary phase. The potential for comprehensive two-dimensional gas chromatography (GC x GC) using silver(I)-containing IL and PIL stationary phases to enhance separation selectivity was also demonstrated.
JOURNAL OF CHROMATOGRAPHY A
(2023)
Article
Engineering, Chemical
Yafei Su, Shenzhen Cong, Meixia Shan, Yatao Zhang
Summary: A facilitated transport membrane was fabricated using a solution-casting method, containing zero-complex Ag(4)tz(4) and 6FDA-TMPDA, which showed excellent separation performance towards C3H6/C3H8 and great long-term stability, making it a promising candidate for gas separation applications.