1
|
da Silva GCQ, Simon JM, Salazar JM. When less is more: does more Na +-cations mean more adsorption sites for toluene in faujasites? Phys Chem Chem Phys 2023; 25:8028-8042. [PMID: 36876505 DOI: 10.1039/d2cp04644j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The unique properties of zeolites make them an interesting material to be used in separation processes. The possibility of tailoring some of their characteristics, like the Si/Al ratio, allows optimizing their synthesis for a given task. Concerning the adsorption of toluene by faujasites an understanding of the effect of cations is necessary to foster the elaboration of new materials, which can capture molecules with a high degree of selectivity and sensitivity. Undoubtedly, this knowledge is relevant for a wide range of applications going from the elaboration of technologies for improving the air-quality to diagnostic procedures to prevent health risks. The studies reported here using Grand Canonical Monte Carlo simulations elucidate the role of Na-cations in the adsorption of toluene by faujasites with different Si/Al ratios. They detail how the location of the cations inhibits or enhances the adsorption. The cations located at site II are shown to be those enhancing the adsorption of toluene on faujasites. Interestingly, the cations located at site III generate a hindrance at high loading. This becomes an impediment for the organization of toluene molecules inside faujasites.
Collapse
Affiliation(s)
- G C Q da Silva
- Laboratoire ICB UMR 6303, Université Bourgogne Franche-Comté, 21078 Dijon, France.
| | - J M Simon
- Laboratoire ICB UMR 6303, Université Bourgogne Franche-Comté, 21078 Dijon, France.
| | - J Marcos Salazar
- Laboratoire ICB UMR 6303, Université Bourgogne Franche-Comté, 21078 Dijon, France.
| |
Collapse
|
2
|
Zheng H, Hou M, Yang S, Tang Z. Adsorption Mechanism of Benzene Alkylation System Catalyzed by an Acid Catalyst: Effect of Pressure. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:8513-8523. [PMID: 35776878 DOI: 10.1021/acs.langmuir.2c00409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Alkylbenzene is an important chemical intermediate, and its industrial production is mainly through the alkylation reaction of benzene and olefin under the action of an acid catalyst. In this article, the adsorption mechanism of benzene/propylene binary in HY zeolite was first revealed by Monte Carlo molecular simulation. It was found that the adsorption mechanism of benzene and propylene changes at the adsorbate loading of 36 molecules/UC, and benzene plays a dominant role. Below this loading, the adsorption sites of benzene and propylene mainly occupy the "ideal" adsorption sites, and benzene has a "first-hand advantage" toward those sites. Above 36 molecules/UC, benzene and propylene coform "molecular clusters" in the supercage of HY, resulting in the enhanced localization of adsorbates, suggesting that at low and intermediate adsorbate loadings the adsorption property is expected to effectively improve by introducing more superior adsorption sites. However, above 36 molecules/UC, the interaction between adsorbents in the clusters becomes dominant. At this point, it is critical to change the cage-like structure of the micropore and introduce more mesopore to facilitate the disintegration of adsorbates clusters and reduce the steric resistance so that the advantage of adsorption sites can be brought into play. These results lay the foundation for optimizing the operating conditions of alkylation reactions and can be further used to explain the effect of loading on similar adsorption separation or catalytic systems, such as catalytic cracking.
Collapse
Affiliation(s)
- Huimin Zheng
- Chemistry and Material Science, Langfang Normal University, 100 Aiminxi Road, Langfang 065000, Hebei Province, P. R. China
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
| | - Mengjiao Hou
- Chemistry and Material Science, Langfang Normal University, 100 Aiminxi Road, Langfang 065000, Hebei Province, P. R. China
| | - Shanshan Yang
- Chemistry and Material Science, Langfang Normal University, 100 Aiminxi Road, Langfang 065000, Hebei Province, P. R. China
| | - Zheyuan Tang
- College of Liberal Arts and Sciences, University of Illinois at Chicago, 1200 W. Harrison Street, Chicago, Illinois 60607, United States
| |
Collapse
|
3
|
Zhou X, Su L, Si F, Wang Y, Zhang T, Wang Y, Yang C, Fu H. Efficient Method to Catch Adsorption Behavior: Understanding the Effect of Sodium Ions on Benzene/Thiophene Adsorption in Na‐FAU. ADVANCED THEORY AND SIMULATIONS 2021. [DOI: 10.1002/adts.202100368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xinming Zhou
- School of Materials Science and Engineering China University of Petroleum (East China) Qingdao 266580 China
| | - Li Su
- College of Science China University of Petroleum (East China) Qingdao 266580 China
| | - Fang Si
- College of Science China University of Petroleum (East China) Qingdao 266580 China
| | - Yajun Wang
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering China University of Petroleum (East China) Qingdao 266580 China
| | - Tianhao Zhang
- College of Science China University of Petroleum (East China) Qingdao 266580 China
| | - Youhe Wang
- College of Science China University of Petroleum (East China) Qingdao 266580 China
| | - Chaohe Yang
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering China University of Petroleum (East China) Qingdao 266580 China
| | - Hui Fu
- College of Science China University of Petroleum (East China) Qingdao 266580 China
| |
Collapse
|
4
|
Xue P, Zheng M, Wang L, Cao L, Zhao L, Gao J, Xu C. Mechanism transformation of cyclohexene-thiophene competitive adsorption in FAU zeolite. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.12.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
5
|
Caro-Ortiz S, Zuidema E, Rigutto M, Dubbeldam D, Vlugt TJH. Competitive Adsorption of Xylenes at Chemical Equilibrium in Zeolites. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2021; 125:4155-4174. [PMID: 33841605 PMCID: PMC8025683 DOI: 10.1021/acs.jpcc.0c09411] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 01/28/2021] [Indexed: 06/12/2023]
Abstract
The separation of xylenes is one of the most important processes in the petrochemical industry. In this article, the competitive adsorption from a fluid-phase mixture of xylenes in zeolites is studied. Adsorption from both vapor and liquid phases is considered. Computations of adsorption of pure xylenes and a mixture of xylenes at chemical equilibrium in several zeolite types at 250 °C are performed by Monte Carlo simulations. It is observed that shape and size selectivity entropic effects are predominant for small one-dimensional systems. Entropic effects due to the efficient arrangement of xylenes become relevant for large one-dimensional systems. For zeolites with two intersecting channels, the selectivity is determined by a competition between enthalpic and entropic effects. Such effects are related to the orientation of the methyl groups of the xylenes. m-Xylene is preferentially adsorbed if xylenes fit tightly in the intersection of the channels. If the intersection is much larger than the adsorbed molecules, p-xylene is preferentially adsorbed. This study provides insight into how the zeolite topology can influence the competitive adsorption and selectivity of xylenes at reaction conditions. Different selectivities are observed when a vapor phase is adsorbed compared to the adsorption from a liquid phase. These insight have a direct impact on the design criteria for future applications of zeolites in the industry. MRE-type and AFI-type zeolites exclusively adsorb p-xylene and o-xylene from the mixture of xylenes in the liquid phase, respectively. These zeolite types show potential to be used as high-performing molecular sieves for xylene separation and catalysis.
Collapse
Affiliation(s)
- Sebastián Caro-Ortiz
- Engineering
Thermodynamics, Process & Energy Department, Faculty of Mechanical,
Maritime and Materials Engineering, Delft
University of Technology, Leeghwaterstraat 39, 2628 CB Delft, The Netherlands
| | - Erik Zuidema
- Shell
Global Solutions International B.V., PO Box 38000, 1030 BN Amsterdam, The Netherlands
| | - Marcello Rigutto
- Shell
Global Solutions International B.V., PO Box 38000, 1030 BN Amsterdam, The Netherlands
| | - David Dubbeldam
- Van’t
Hoff Institute of Molecular Sciences, University
of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Thijs J. H. Vlugt
- Engineering
Thermodynamics, Process & Energy Department, Faculty of Mechanical,
Maritime and Materials Engineering, Delft
University of Technology, Leeghwaterstraat 39, 2628 CB Delft, The Netherlands
| |
Collapse
|
6
|
Xu Y, Zhong Z, Lu S, Zeng Y. Monte Carlo Simulations of Adsorption of Thiophene/Benzene in NaX and NaY Zeolites from Model Fuel. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02708] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yueyang Xu
- School of Energy and Environment, Southeast University, Nanjing 210096, China
- Guodian Science and Technology Research Institute Co. Ltd., Nanjing 210023, China
| | - Zhaoping Zhong
- School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Shengjie Lu
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| | - Yongping Zeng
- School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China
| |
Collapse
|
7
|
Zheng H, Zhai D, Zhao L, Zhang C, Yu S, Gao J, Xu C. Insight into the Contribution of Isolated Mesopore on Diffusion in Hierarchical Zeolites: The Effect of Temperature. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00515] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Huimin Zheng
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
- Faculty of Chemistry and Material Science, Langfang Teachers College, 100 Aiminxi Road, Langfang 065000, Hebei Province P. R. China
| | - Dong Zhai
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
- Department of Physics and International Centre for Quantum and Molecular Structures, Shanghai University, 99 Shangda Road, Shanghai 200444, P. R. China
| | - Liang Zhao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
| | - Chenggen Zhang
- Faculty of Chemistry and Material Science, Langfang Teachers College, 100 Aiminxi Road, Langfang 065000, Hebei Province P. R. China
| | - Suyuan Yu
- Faculty of Chemistry and Material Science, Langfang Teachers College, 100 Aiminxi Road, Langfang 065000, Hebei Province P. R. China
| | - Jinsen Gao
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
| | - Chunming Xu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
| |
Collapse
|
8
|
Dang S, Zhao L, Gao J, Xu C. Loading Dependence of the Adsorption Mechanism of Thiophene in FAU Zeolite. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b03135] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shanqing Dang
- State Key
Laboratory of Heavy
Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
| | - Liang Zhao
- State Key
Laboratory of Heavy
Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
| | - Jinsen Gao
- State Key
Laboratory of Heavy
Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
| | - Chunming Xu
- State Key
Laboratory of Heavy
Oil Processing, China University of Petroleum (Beijing), 18 Fuxue Road, Beijing 102249, P. R. China
| |
Collapse
|
9
|
Asl MH, Moosavi F, Sargolzaei J, Sharifi K. Molecular dynamics simulation study: The decryption of bi and tri aromatics behavior with NaX zeolite. J Mol Graph Model 2016; 69:61-71. [DOI: 10.1016/j.jmgm.2016.08.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Revised: 07/21/2016] [Accepted: 08/08/2016] [Indexed: 11/17/2022]
|
10
|
Haghighi Asl M, Moosavi F, Sargolzaei J. Molecular dynamics simulation study: The reactivation of NaX zeolite contaminated by bi and tri aromatics using supercritical fluid extraction. J Supercrit Fluids 2016. [DOI: 10.1016/j.supflu.2016.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
11
|
Zheng H, Zhao L, Ji J, Yang Q, Huang H, Gao J. Molecular origin of decreased diffusivity with loading for benzene/HY. AIChE J 2016. [DOI: 10.1002/aic.15249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Huimin Zheng
- State Key Laboratory of Heavy Oil Processing; China University of Petroleum; Beijing 102249 China
| | - Liang Zhao
- State Key Laboratory of Heavy Oil Processing; China University of Petroleum; Beijing 102249 China
| | - Jingjing Ji
- State Key Laboratory of Heavy Oil Processing; China University of Petroleum; Beijing 102249 China
| | - Qing Yang
- State Key Laboratory of Heavy Oil Processing; China University of Petroleum; Beijing 102249 China
| | - Haokai Huang
- State Key Laboratory of Heavy Oil Processing; China University of Petroleum; Beijing 102249 China
| | - Jinsen Gao
- State Key Laboratory of Heavy Oil Processing; China University of Petroleum; Beijing 102249 China
| |
Collapse
|
12
|
Zheng H, Zhao L, Yang Q, Dang S, Wang Y, Gao J, Xu C. Insight into the adsorption mechanism of benzene in HY zeolites: the effect of loading. RSC Adv 2016. [DOI: 10.1039/c6ra02338j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An interesting two-stage adsorption mechanism, defined as “ideal adsorption” and “insertion adsorption”, was first proposed for the benzene/HY system by Metropolic Monte Carlo simulations at loadings below and above an “inflection point”.
Collapse
Affiliation(s)
- Huimin Zheng
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- China
| | - Liang Zhao
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- China
| | - Qing Yang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- China
| | - Shanqing Dang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- China
| | - Yuxian Wang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- China
| | - Jinsen Gao
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- China
| | - Chunming Xu
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum (Beijing)
- Beijing 102249
- China
| |
Collapse
|