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Qian J, Pu X, Liu Q, Zhou X, Han X, Ye L, Qin X, Liu J. Introducing of Cu(I) in MOFs by In Situ Reduction with Ni as the Catalyst for Efficient Olefin/Paraffin Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023. [PMID: 38029304 DOI: 10.1021/acs.langmuir.3c02731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Olefins can be cracked to provide more low-carbon olefins than paraffins; therefore, separation of olefin/paraffin mixtures is essential for arranging hydrocarbon molecules for directed conversion. In this article, a simple approach for reducing copper atoms in Cu-BTC has been developed to improve olefin/paraffin adsorption capacity and selectivity. Considering that Cu-BTC shows adsorption benefits, its olefin/paraffin adsorption and separation performance were improved further by in situ reduction of Cu(II) to Cu(I) in Cu-BTC using ethanol as the reducing agent and nickel ions as the catalyst. The results revealed that during the reduction process, Cu ion conversion from tetra-ligand to diligand considerably increased their specific surface area, resulting in more active adsorption sites inside the modified sample. The ratio of Cu(I)/Cu(II) in the modified samples varied from 0.57 to 0.96. When Cu(II) of Cu-BTC was reduced to Cu(I), the adsorption capacities of 1-hexene increased from 145.97 to 243.65 mg/g, whereas n-hexane adsorption increased only slightly from 8.18 to 11.43 mg/g, resulting in an acceptable increase in selectivity from 17.84 to 21.32. Cu-BTC, due to its own Cu atoms, minimizes the substantial requirements for the synthesis process as well as the oxygen avoidance conditions for storage when monovalent copper is introduced, compared to other porous materials. Experimental results found that when Cu(I) was introduced, the Lewis acidic sites of the modified Cu-BTC material were increased, and Cu(I) has an electrical structure that makes it susceptible to both accepting and donating too many d electrons, resulting in a stronger adsorption of olefins containing π-electrons to them. Materials Studio simulation revealed that the isosteric heats of modified Cu-BTC increased by 2.7 kJ/mol, indicating that it has a stronger adsorption capacity for olefins.
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Affiliation(s)
- Jiayu Qian
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xin Pu
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Qiaona Liu
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xiaoyu Zhou
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xin Han
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Lei Ye
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Xinglong Qin
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
| | - Jichang Liu
- School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, Shihezi 832003, Xinjiang, China
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Crucial role of alkali metal ions and Si/Al ratio in selective adsorption of 1-octene using faujasite zeolites. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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3
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Mousavi SH, Chen K, Yao J, Zavabeti A, Liu JZ, Li GK. Screening of Alkali Metal-Exchanged Zeolites for Nitrogen/Methane Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:1277-1287. [PMID: 36626709 DOI: 10.1021/acs.langmuir.2c03089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Methane (CH4) is the primary component of natural gas and must be purified to a certain level before it can be used as pipeline gas or liquified natural gas (LNG). In particular, nitrogen (N2), a common contaminant in natural gas needs to be rejected to increase the heating value of the gas and meet the LNG product specifications. The development of energy-efficient N2 removal technologies is hampered by N2's inertness and its resemblance to CH4 in terms of kinetic size and polarizability. N2-selective materials are so rare. Here, for the first time, we screened 1425 alkali metal cation exchange zeolites to identify the candidates with the best potential for the separation of N2 from CH4. We discovered a few extraordinary zeolite frameworks capable of achieving equilibrium selectivity toward N2. Particularly, Li+-RRO-3 zeolite with a specific two-dimensional structure demonstrated a selective N2 adsorption capacity of 2.94 mmol/g at 283 K and 1 bar, outperforming the capacity of all known zeolites. Through an ab initio density functional theory study, we found that the five-membered ring of the RRO framework is the most stable cationic site for Li+, and this Li+ can interact with multiple N2 molecules but only one CH4, revealing the mechanism for the high capacity and selectivity of N2. This work suggests promising adsorbents to enable N2 rejection from CH4 in the gas industry without going for energy-intensive cryogenic distillations.
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Affiliation(s)
- Seyed Hesam Mousavi
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Kaifei Chen
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Jie Yao
- Department of Applied Chemistry, School of Engineering, University of Toyama, Toyama 930-8555, Japan
| | - Ali Zavabeti
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Jefferson Zhe Liu
- Department of Mechanical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Gang Kevin Li
- Department of Chemical Engineering, The University of Melbourne, Parkville, Victoria 3010, Australia
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Wang X, Hinkle KR, Jameson CJ, Murad S. Using Molecular Simulations to Facilitate Design and Operation of Membrane-Based and Chiral Separation Processes. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c01470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiaoyu Wang
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556
| | - Kevin R. Hinkle
- Department of Chemical and Materials Engineering, University of Dayton, Dayton, Ohio 45469
| | - Cynthia J. Jameson
- Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States
| | - Sohail Murad
- Department of Chemical and Biological Engineering, Illinois Institute of Technology, Chicago, Illinois 60616, United States
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Al-Bahri OH, Borah B, Elzain M, Varanasi SR. Thermodynamics of translational and rotational dynamics of C9 hydrocarbons in the pores of zeolite-beta. J Mol Graph Model 2022; 114:108188. [DOI: 10.1016/j.jmgm.2022.108188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 04/03/2022] [Accepted: 04/03/2022] [Indexed: 10/18/2022]
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Kim J, Jung T, Cho DW, Yoo CY. Comprehensive evaluation of 3A, 4A, 5A, and 13X zeolites for selective 1-octene adsorption over n-octane. J IND ENG CHEM 2022. [DOI: 10.1016/j.jiec.2022.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Yin X, Zha J, Gregor S, Ding S, Alsuwaidi A, Zhang X. Finned hierarchical MOFs supported on cellulose for the selective adsorption of n-hexane and 1-hexene. Chem Commun (Camb) 2021; 57:13756-13759. [PMID: 34854854 DOI: 10.1039/d1cc04548b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Finned hierarchical MOF particles (Cu(BDC) nanosheets as fins grown perpendicularly on Ni2(BDC)2(DABCO) hexagonal prisms) were synthesized on modified cellulose support. The hierarchical MOF particles exposed the open Cu(II) sites on Cu(BDC) to enable selective 1-hexene/n-hexane separation.
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Affiliation(s)
- Xinyang Yin
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16801, USA.
| | - Jie Zha
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16801, USA.
| | - Skyler Gregor
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16801, USA. .,Chemical Engineering Program, Century College, White Bear Lake, MN 55110, USA
| | - Shengzhe Ding
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16801, USA.
| | - Ahmad Alsuwaidi
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16801, USA.
| | - Xueyi Zhang
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16801, USA.
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Adsorption separation of liquid-phase C5-C6 alkynes and olefins using FAU zeolite adsorbents. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119563] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Li H, Zhang Z, Sun G, Liu S, An L, Li X, Li H, Gao X. Performance and mechanism of the separation of
C8
α‐olefin from
F‐T
synthesis products using novel
Ag‐DES. AIChE J 2021. [DOI: 10.1002/aic.17252] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hu Li
- School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University Tianjin 300072 China
| | - Zisheng Zhang
- School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University Tianjin 300072 China
- Department of Chemical and Biological Engineering University of Ottawa Ottawa Ontario K1N 6N5 Canada
| | - Guanlun Sun
- School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University Tianjin 300072 China
| | - Suli Liu
- Ningxia Coal Industry Group Co. Ltd., CHN ENERGY Yinchuan 750011 China
| | - Liangcheng An
- Ningxia Coal Industry Group Co. Ltd., CHN ENERGY Yinchuan 750011 China
| | - Xingang Li
- School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University Tianjin 300072 China
| | - Hong Li
- School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University Tianjin 300072 China
| | - Xin Gao
- School of Chemical Engineering and Technology National Engineering Research Center of Distillation Technology, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University Tianjin 300072 China
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