1
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Enhanced adsorptive removal of ammonium on the Na+/Al3+ enriched natural zeolite. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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2
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Pagis C, Morgado Prates AR, Bats N, Tuel A, Farrusseng D. High-silica hollow Y zeolite by selective desilication of dealuminated NaY crystals in the presence of protective Al species. CrystEngComm 2018. [DOI: 10.1039/c8ce00121a] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
High-silica hollow faujasite crystals were obtained by dealumination of standard NaY crystals followed by their selective desilication in the presence of protective aluminum species.
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Affiliation(s)
- Céline Pagis
- Université de Lyon
- Université Claude Bernard Lyon 1
- CNRS
- IRCELYON - UMR 5256
- 69626 Villeurbanne Cedex
| | - Ana Rita Morgado Prates
- Université de Lyon
- Université Claude Bernard Lyon 1
- CNRS
- IRCELYON - UMR 5256
- 69626 Villeurbanne Cedex
| | - Nicolas Bats
- IFP Energies Nouvelles
- Etablissement de Lyon
- 69360 Solaize
- France
| | - Alain Tuel
- Université de Lyon
- Université Claude Bernard Lyon 1
- CNRS
- IRCELYON - UMR 5256
- 69626 Villeurbanne Cedex
| | - David Farrusseng
- Université de Lyon
- Université Claude Bernard Lyon 1
- CNRS
- IRCELYON - UMR 5256
- 69626 Villeurbanne Cedex
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3
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Zhou Z, Cheng F, Qin J, Yu P, Xu L, Gu Z, Liu X, Wu W. Preparation of H-mordenite/MCM-48 composite and its catalytic performance in the alkylation of toluene with tert-butanol. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2017. [DOI: 10.1134/s0036024417090345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Almulla FM, Zholobenko VI, Hill PI, Chansai S, Garforth AA. Transalkylation of Toluene with 1,2,4-Trimethylbenzene over Large Pore Zeolites. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b01388] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Faisal M. Almulla
- School
of Chemical Engineering and Analytical Science, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Vladimir I. Zholobenko
- School
of Chemical and Physical Sciences, Keele University, Keele ST5 5BG, United Kingdom
| | - Patrick I. Hill
- School
of Chemical Engineering and Analytical Science, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Sarayute Chansai
- School
of Chemical Engineering and Analytical Science, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Arthur A. Garforth
- School
of Chemical Engineering and Analytical Science, The University of Manchester, Manchester M13 9PL, United Kingdom
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5
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Li J, Liu H, An T, Yue Y, Bao X. Carboxylic acids to butyl esters over dealuminated–realuminated beta zeolites for removing organic acids from bio-oils. RSC Adv 2017. [DOI: 10.1039/c7ra05298g] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This article describes a novel method to dealuminate and realuminate H-beta zeolites as catalysts for removing organic acids from bio-oils via their esterification reactions with alcohols.
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Affiliation(s)
- Jianhua Li
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum
- Beijing 102249
- P. R. China
| | - Haiyan Liu
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum
- Beijing 102249
- P. R. China
| | - Tingting An
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum
- Beijing 102249
- P. R. China
| | - Yuanyuan Yue
- National Engineering Research Center of Chemical Fertilizer
- College of Chemical Engineering
- Fuzhou University
- Fuzhou 350116
- P. R. China
| | - Xiaojun Bao
- National Engineering Research Center of Chemical Fertilizer
- College of Chemical Engineering
- Fuzhou University
- Fuzhou 350116
- P. R. China
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6
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Yan X, Ke M, Song Z, Jiang Q, Yu P. Etherification over Hβ zeolite modified by lanthanum ion exchange combined with low-temperature steam treatment. RSC Adv 2016. [DOI: 10.1039/c5ra23438g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Lanthanum ion exchange, steam treatment and La/steam combined modification were used to modify Hβ zeolite, and then comparative studies were performed on the influences of single and compound modified methods on the etherification activity.
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Affiliation(s)
- Ximing Yan
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum
- Beijing
- China
| | - Ming Ke
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum
- Beijing
- China
| | - Zhaozheng Song
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum
- Beijing
- China
| | - Qingzhe Jiang
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum
- Beijing
- China
| | - Pei Yu
- State Key Laboratory of Heavy Oil Processing
- China University of Petroleum
- Beijing
- China
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7
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8
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Jin J, Ye X, Li Y, Wang Y, Li L, Gu J, Zhao W, Shi J. Synthesis of mesoporous Beta and Sn-Beta zeolites and their catalytic performances. Dalton Trans 2014; 43:8196-204. [DOI: 10.1039/c4dt00567h] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mesoporous Beta and Sn-Beta zeolites have been successfully synthesized through a hydrothermal templating and a subsequent post-synthetic route, respectively.
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Affiliation(s)
- Junjiang Jin
- Lab of Low-Dimensional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237, P.R. China
| | - Xinxin Ye
- Shanghai Key Laboratory of Functional Materials Chemistry
- East China University of Science and Technology
- Shanghai 200237, P.R. China
| | - Yongsheng Li
- Lab of Low-Dimensional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237, P.R. China
| | - Yanqin Wang
- Shanghai Key Laboratory of Functional Materials Chemistry
- East China University of Science and Technology
- Shanghai 200237, P.R. China
| | - Liang Li
- Lab of Low-Dimensional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237, P.R. China
| | - Jinlou Gu
- Lab of Low-Dimensional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237, P.R. China
| | - Wenru Zhao
- Lab of Low-Dimensional Materials Chemistry
- School of Materials Science and Engineering
- East China University of Science and Technology
- Shanghai 200237, P.R. China
| | - Jianlin Shi
- State Key Laboratory of High Performance Ceramics and Superfine Microstructures
- Shanghai Institute of Ceramics
- Chinese Academy of Science
- Shanghai 200050, P.R. China
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9
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Enhanced Concentration of Medium Strength Brönsted Acid Sites in Aluminium-Modified β Zeolite. Catal Letters 2011. [DOI: 10.1007/s10562-011-0736-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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10
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ZHOU Z, WU W, WANG J, ZENG C. Tert-butylation of Toluene with Tert-butyl Alcohol over Realuminated H-mordenite Zeolite. Chin J Chem Eng 2009. [DOI: 10.1016/s1004-9541(08)60193-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Lemos de Macedo J, Ferreira Ghesti G, Alves Dias J, Cláudia Loureiro Dias S. Liquid phase calorimetry and adsorption analyses of zeolite beta acidity. Phys Chem Chem Phys 2008; 10:1584-92. [DOI: 10.1039/b715142j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Fan Y, Bao X, Lin X, Shi G, Liu H. Acidity Adjustment of HZSM-5 Zeolites by Dealumination and Realumination with Steaming and Citric Acid Treatments. J Phys Chem B 2006; 110:15411-6. [PMID: 16884262 DOI: 10.1021/jp0607566] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This article describes a novel method for acidity adjustment of HZSM-5 zeolites with steaming and citric acid treatments and demonstrates the realumination effect of citric acid on HZSM-5 zeolites dealuminated by steaming. A series of modified HZSM-5 zeolites were prepared by streaming and/or acid treatments and characterized by means of X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF), (27)Al MAS NMR spectroscopy, hydroxyl infrared spectroscopy (OH-IR), pyridine-adsorbed infrared spectroscopy, and N(2) adsorption in the present investigation. The results showed that compared with single HCl or citric acid treatment, steaming treatment, and steaming/HCl treatments, citric acid treatment after steaming exclusively increased the amount of framework Al due to reinsertion of extraframework Al into the defective sites of the steamed HZSM-5 framework. This realumination effect of the citric acid treatment on the steamed HZSM-5 zeolite, which is reported here for the first time to the best of our knowledge, could nearly recover the pore structure of the steamed zeolite to that of the parent HZSM-5 zeolite and appropriately tailor the amount and strength of different acid sites, which sheds light on optimizing the physicochemical properties of HZSM-5 zeolites. It was also found that the steaming treatment prior to the citric acid treatment was the precondition of the realumination of HZSM-5 zeolites, suggesting that the lattice defect sites generated during steaming were necessary for citric acid to work.
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Affiliation(s)
- Yu Fan
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, P. R. China
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13
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Groen JC, Peffer LAA, Moulijn JA, Pérez-Ramírez J. Mechanism of hierarchical porosity development in MFI zeolites by desilication: the role of aluminium as a pore-directing agent. Chemistry 2006; 11:4983-94. [PMID: 15968702 DOI: 10.1002/chem.200500045] [Citation(s) in RCA: 238] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The role of the concentration and the nature of aluminium in the creation of hierarchical porosity in both commercial and synthesized MFI zeolites have been investigated through controlled mesoporosity development by desilication in alkaline medium. Framework aluminium controls the process of framework silicon extraction and makes desilication selective towards intracrystalline mesopore formation. An optimal molar Si/Al ratio in the range 25-50 has been identified; this leads to an optimal mesoporosity centred around 10 nm and mesopore surface areas of up to 235 m(2) g(-1) while preserving the intrinsic crystalline and acidic properties. At lower framework Si/Al ratios the relatively high Al content inhibits Si extraction and hardly any mesopores are created, while in highly siliceous ZSM-5 unselective extraction of framework Si induces formation of large pores. The existence of framework Al sites in different T positions that are more or less susceptible to the alkaline treatment, and the occurrence of re-alumination, are tentative explanations for the remarkable behaviour of Al in the desilication process. The presence of substantial extra framework Al, obtained by steam treatment, inhibits Si extraction and related mesopore formation; this is attributed to re-alumination of the extraframework Al species during the alkaline treatment. Removal of extraframework Al species by mild oxalic acid treatment restores susceptibility to desilication, which is accompanied by formation of larger mesopores due to the enhanced Si/Al ratio in the acid-treated zeolite.
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Affiliation(s)
- Johan C Groen
- DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands.
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Groen JC, Jansen JC, Moulijn JA, Pérez-Ramírez J. Optimal Aluminum-Assisted Mesoporosity Development in MFI Zeolites by Desilication. J Phys Chem B 2004. [DOI: 10.1021/jp047194f] [Citation(s) in RCA: 412] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Johan C. Groen
- DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands, and Catalysis and Nitric Acid Technology, Yara Technology Centre Porsgrunn, P.O. Box 2560, N-3908, Porsgrunn, Norway
| | - Jacobus C. Jansen
- DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands, and Catalysis and Nitric Acid Technology, Yara Technology Centre Porsgrunn, P.O. Box 2560, N-3908, Porsgrunn, Norway
| | - Jacob A. Moulijn
- DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands, and Catalysis and Nitric Acid Technology, Yara Technology Centre Porsgrunn, P.O. Box 2560, N-3908, Porsgrunn, Norway
| | - Javier Pérez-Ramírez
- DelftChemTech, Delft University of Technology, Julianalaan 136, 2628 BL Delft, The Netherlands, and Catalysis and Nitric Acid Technology, Yara Technology Centre Porsgrunn, P.O. Box 2560, N-3908, Porsgrunn, Norway
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