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Zhan J, Wang Y, He T, Sheng L, Wu B, Liu Q, Jia M, Zhang Y. Nonionic polymer and amino acid-assisted synthesis of ZSM-5 nanocrystals and their catalytic application in the alkylation of 2-methylnaphthalene. Dalton Trans 2024; 53:7384-7396. [PMID: 38587258 DOI: 10.1039/d4dt00096j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
The synthesis of nanosized ZSM-5 zeolites with high crystallinity and suitable acidity is very significant for their great potential in various catalytic applications. Herein, a series of zeolite ZSM-5 crystals with different particle sizes and SiO2/Al2O3 ratios (10-30) were synthesized by a temperature-varying two-step crystallization method in a concentrated gel system containing L-lysine and/or polyvinylpyrrolidone (PVP) additives. By optimizing the addition amounts of the two additives, the crystal size of the ZSM-5 zeolite could be reduced to less than 100 nm. Meanwhile, relatively high crystallinity and framework Al incorporation rates could be achieved, resulting in the generation of high-quality ZSM-5 nanocrystals. The nanosized H-form ZSM-5 zeolite with a SiO2/Al2O3 ratio of 20 showed enhanced catalytic efficiency and stability for the alkylation of 2-methylnaphthalene (2-MN) with methanol to produce an important intermediate, 2,6-dimethylnaphthalene (2,6-DMN). A relatively high and steady yield of 2,6-DMN (above 7.2%) could be achieved during 20 h time-on-stream at 400 °C. The smaller crystal size, higher crystallinity and framework Al content could provide more accessible Brønsted acid sites in the 10-membered ring channel of the ZSM-5 nanocrystals, which are the main active sites responsible for the shape-selectivity of the targeted product of 2,6-DMN. As a result, the formation of other side products like 1-MN and poly-MN could be effectively inhibited, thus leading to an improved 2,6-DMN yield and coke resistance over the nanosized ZSM-5 catalyst.
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Affiliation(s)
- Junling Zhan
- College of Chemistry, Jilin University, Changchun, Jilin, 130012, China.
- College of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin, Jilin, 132022, China.
| | - Ying Wang
- College of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin, Jilin, 132022, China.
| | - Tengfei He
- College of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin, Jilin, 132022, China.
| | - Luyang Sheng
- College of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin, Jilin, 132022, China.
| | - Banghao Wu
- College of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin, Jilin, 132022, China.
| | - Qun Liu
- College of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin, Jilin, 132022, China.
| | - Mingjun Jia
- College of Chemistry, Jilin University, Changchun, Jilin, 130012, China.
| | - Yu Zhang
- College of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin, Jilin, 132022, China.
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Ma JT, Meng TF, Chen ZY, Zhu YJ, Lian C, Wang P, Liu DH, Zhao YP. Catalytic performance and mechanism study of the isomerization of 2,5-dichlorotoluene to 2,4-dichlorotoluene. RSC Adv 2024; 14:8709-8717. [PMID: 38495976 PMCID: PMC10938376 DOI: 10.1039/d4ra00223g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Accepted: 03/10/2024] [Indexed: 03/19/2024] Open
Abstract
This work investigates the influence of catalyst HZSM-5 on the isomerization of 2,5-dichlorotoluene (2,5-DCT) to produce 2,4-dichlorotoluene (2,4-DCT). We observe that hydrothermal treatment leads to a decrease in total acidity and Brønsted/Lewis ratio of HZSM-5 while generating new secondary pores. These characteristics result in excellent selectivity for post-hydrothermal modified HZSM-5 in the isomerization reaction from 2,5-DCT to 2,4-DCT. Under atmospheric pressure at 350 °C, unmodified HZSM-5 achieves a selectivity of 66.4% for producing 2,4-DCT, however after hydrothermal modification the selectivity increases to 78.7%. Density Functional Theory (DFT) calculations explore the thermodynamic aspects of adsorption between the HZSM-5 surface and 2,4-DCT. The kinetic perspective investigates the mechanism involving proton attack on the methyl group of 2,5-DCT followed by rearrangement leading to formation of 2,4-DCT during isomerization. The consistency between simulation and experimental results provides evidence for the feasibility of isomerizing 2,5-DCT to 2,4-DCT. This work fills the gap in the low value-added product 2,5-DCT isomer conversion, indicating its significant practical application potential and provides a valuable reference and guidelines for industrial research in this field.
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Affiliation(s)
- Jiang-Tao Ma
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University Nanjing 210009 China
- School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
| | - Teng-Fei Meng
- School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
| | - Zi-Yun Chen
- School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
| | - Yu-Jun Zhu
- Department of Pharmaceutical and Biomedical Engineering, Clinical College of Anhui Medical University Hefei 230031 China
| | - Cheng Lian
- School of Chemistry and Molecular Engineering, East China University of Science and Technology Shanghai 200237 China
| | - Peng Wang
- School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
| | - Ding-Hua Liu
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University Nanjing 210009 China
| | - Yu-Pei Zhao
- School of Petrochemical Engineering, Changzhou University Changzhou 213164 China
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Wang Z, Chang H, Zhang J, Sun Z, Wu Y, Liu Y, Zhu Y, He H, Cao Y, Bao X. Tandem catalytic methylation of naphthalene using CO 2 and H 2. Chem Commun (Camb) 2022; 58:3779-3782. [PMID: 35229864 DOI: 10.1039/d2cc00190j] [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
We report here the direct methylation of naphthalene using CO2 and H2, which is distinctly more effective than the counterpart methylation with methanol. Benefiting from well-balanced specific rates for CO2-to-methanol conversion over ZnZrOx and the subsequent methylation over H-Beta, significantly enhanced selectivity (93.7%) to monomethylnaphthalenes was achieved.
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Affiliation(s)
- Zijian Wang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Haohao Chang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Jiang Zhang
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Zehui Sun
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Yulin Wu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Yongmei Liu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Yifeng Zhu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Heyong He
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Yong Cao
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Department of Chemistry, Fudan University, Shanghai 200433, China.
| | - Xinhe Bao
- State Key Laboratory of Catalysis, National Laboratory for Clean Energy, Collaborative Innovation Center of Chemistry for Energy Materials, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China.
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Methylation of 2-methylnaphthalene over metal-impregnated mesoporous MCM-41 for the synthesis of 2,6-triad dimethylnaphthalene isomers. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04098-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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5
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Transalkylation of C10 aromatics with 2-methylnaphthalene for 2,6-dimethylnaphthalene synthesis: High-efficiently shape-selective & synergistic catalysis over a multifunctional SiO2-Mo-HBeta catalyst. J Catal 2019. [DOI: 10.1016/j.jcat.2019.08.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Li J, Gong Q, Lian H, Hu Z, Zhu Z. New Process for 2,6-Dimethylnaphthalene Synthesis by Using C 10 Aromatics as Solvent and Transmethylation-Agentia: High-Efficiency and Peculiar Subarea-Catalysis over Shape-Selective ZSM-5/Beta Catalyst. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01596] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Junhui Li
- School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China
| | - Qing Gong
- School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
| | - Hua Lian
- School of Chemical Engineering, Xiangtan University, Xiangtan 411105, China
| | - Zhonghua Hu
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China
| | - Zhirong Zhu
- Shanghai Key Lab of Chemical Assessment and Sustainability, School of Chemical Science and Engineering, Tongji University, Siping Road 1239, Shanghai 200092, China
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Selective synthesis of 2,6-triad dimethylnaphthalene isomers by disproportionation of 2-methylnaphthalene over mesoporous MCM-41. RESEARCH ON CHEMICAL INTERMEDIATES 2018. [DOI: 10.1007/s11164-018-3551-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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8
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A kinetic study on methylation of naphthalene over Fe/ZSM-5 zeolite catalysts. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-017-3090-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Wang P, Chen L, Xie J, Li H, Au CT, Yin SF. Enhanced catalytic performance in CH3Br conversion to benzene, toluene, and xylene over steamed HZSM-5 zeolites. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00334j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Catalytic conversion of CH3Br to benzene, toluene and xylene (BTX) was investigated over HZSM-5 and steam-treated HZSM-5 zeolites.
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Affiliation(s)
- Peng Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
| | - Lang Chen
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
| | - Jun Xie
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
| | - Hang Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
| | - Chak-Tong Au
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
| | - Shuang-Feng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics
- Hunan Provincial Key Laboratory for Cost-effective Utilization of Fossil Fuel Aimed at Reducing Carbon-dioxide Emissions
- College of Chemistry and Chemical Engineering
- Hunan University
- Changsha 410082
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Xiao L, Liu D, Xu M, Wu W. Highly selective formation of 2,6-dimethylnaphthalene in HCl-modified triethylamine–aluminum chloride ionic liquid. Catal Sci Technol 2012. [DOI: 10.1039/c2cy00239f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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11
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Methylation of 2-Methylnaphthalene with Methanol over NH4F and Pt Modified HZSM-5 Catalysts. Chin J Chem Eng 2010. [DOI: 10.1016/s1004-9541(09)60123-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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