1
|
Antunes MM, Silva AF, Fernandes A, Ribeiro F, Neves P, Pillinger M, Valente AA. Micro/mesoporous LTL derived materials for catalytic transfer hydrogenation and acid reactions of bio-based levulinic acid and furanics. Front Chem 2022; 10:1006981. [PMID: 36247668 PMCID: PMC9558274 DOI: 10.3389/fchem.2022.1006981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 09/06/2022] [Indexed: 12/02/2022] Open
Abstract
The biomass-derived platform chemicals furfural and 5-(hydroxymethyl)furfural (HMF) may be converted to α-angelica lactone (AnL) and levulinic acid (LA). Presently, LA (synthesized from carbohydrates) has several multinational market players. Attractive biobased oxygenated fuel additives, solvents, etc., may be produced from AnL and LA via acid and reduction chemistry, namely alkyl levulinates and γ-valerolactone (GVL). In this work, hierarchical hafnium-containing multifunctional Linde type L (LTL) related zeotypes were prepared via top-down strategies, for the chemical valorization of LA, AnL and HMF via integrated catalytic transfer hydrogenation (CTH) and acid reactions in alcohol medium. This is the first report of CTH applications (in general) of LTL related materials. The influence of the post-synthesis treatments/conditions (desilication, dealumination, solid-state impregnation of Hf or Zr) on the material properties and catalytic performances was studied. AnL and LA were converted to 2-butyl levulinate (2BL) and GVL in high total yields of up to ca. 100%, at 200°C, and GVL/2BL molar ratios up to 10. HMF conversion gave mainly the furanic ethers 5-(sec-butoxymethyl)furfural and 2,5-bis(sec-butoxymethyl)furan (up to 63% total yield, in 2-butanol at 200°C/24 h). Mechanistic, reaction kinetics and material characterization studies indicated that the catalytic results depend on a complex interplay of different factors (material properties, type of substrate). The recovered-reused solids performed steadily.
Collapse
Affiliation(s)
- Margarida M. Antunes
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
- *Correspondence: Margarida M. Antunes, ; Anabela A. Valente,
| | - Andreia F. Silva
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Auguste Fernandes
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Filipa Ribeiro
- Centro de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Patrícia Neves
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Martyn Pillinger
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
| | - Anabela A. Valente
- Department of Chemistry, CICECO—Aveiro Institute of Materials, University of Aveiro, Aveiro, Portugal
- *Correspondence: Margarida M. Antunes, ; Anabela A. Valente,
| |
Collapse
|
2
|
Galadima A, Masudi A, Muraza O. Towards Extraordinary Catalysts for Aromatization of Biomass and Low-Cost C5 Streams. CATALYSIS SURVEYS FROM ASIA 2022. [DOI: 10.1007/s10563-022-09364-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
3
|
Shou H, Dasari PR, Broekhuis RR, Mondal A, Patel A, Nguyen C, Fickel DW. Cracking of Butane on a Pt/H-ZSM-5 Catalyst in the Presence of Hydrogen. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04545] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Heng Shou
- SABIC Global Corporate Research, 1600 Industrial Blvd, Sugar Land, Texas 77478, United States
| | - Prasanna R. Dasari
- SABIC Global Corporate Research, 1600 Industrial Blvd, Sugar Land, Texas 77478, United States
| | - Robert R. Broekhuis
- SABIC Global Corporate Research, 1600 Industrial Blvd, Sugar Land, Texas 77478, United States
| | - Amit Mondal
- Analytical Technology, SABIC Technology Center, Bangalore 562125, India
| | - Ashwin Patel
- SABIC Global Corporate Research, 1600 Industrial Blvd, Sugar Land, Texas 77478, United States
| | - Cong Nguyen
- SABIC Global Corporate Research, 1600 Industrial Blvd, Sugar Land, Texas 77478, United States
| | - Dustin W. Fickel
- SABIC Global Corporate Research, 1600 Industrial Blvd, Sugar Land, Texas 77478, United States
| |
Collapse
|
4
|
Yan M, Xu D, Wu B, Yang Y, Li Y. Insight into different performance of Pt/KL catalysts for n-alkane (C6-C8) aromatization: catalytic role of zeolite channels. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02090k] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Zeolite channel architecture was vital to catalytic activity and products distribution during the naphtha reforming, which could be effectively utilized by designing the locations of active sites. Herein, uniformly dispersed...
Collapse
|
5
|
Wang J, Liu C, Zhu P, Liu H, Zhang X. Mercaptosilane-assisted synthesis of highly dispersed and stable Pt nanoparticles on HL zeolites for enhancing hydroisomerization of n-hexane. NEW J CHEM 2022. [DOI: 10.1039/d1nj05774j] [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
Pt/HL-SH catalysts were synthesized by a facile mercaptosilane-assisted in situ synthesis approach and exhibited better catalytic performance in n-hexane hydroisomerization.
Collapse
Affiliation(s)
- Jinshan Wang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Cun Liu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Peng Zhu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Haiou Liu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| | - Xiongfu Zhang
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China
| |
Collapse
|
6
|
Xu D, Yin J, Gao Y, Zhu D, Wang S. Atomic-Scale Designing of Zeolite Based Catalysts by Atomic Layer Deposition. Chemphyschem 2021; 22:1287-1301. [PMID: 33844400 DOI: 10.1002/cphc.202100116] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/12/2021] [Indexed: 12/15/2022]
Abstract
Zeolite-supported catalysts have been widely used in the field of heterogeneous catalysis. Atomic-scale governing the metal or acid sites on zeolites still encounters great challenge in controllable synthesis and developing of novel catalysts. Atomic layer deposition (ALD), owing to its unique character of self-limiting surface reactions, becomes one of the most promising and controllable strategies to tailor the metallic deposition sites in atomic scale precisely. In this review, we present a comprehensive summary and viewpoint of recent research in designing and engineering the structural of zeolite-based catalysts via ALD method. A prior focus is laid on the deposition of metals on the zeolites with emphasis on the isolated states of metals, followed by introducing the selected metals into channels of zeolites associates with identifying the location of metals in and/or out of the channels. Subsequently, detailed analysis of tailoring the acid sites of different zeolites is provided. Assisted synthesis of zeolite and the regioselective deposition of metal on special sites to modify the structures of zeolites are also critically discussed. We further summarize the challenges of ALD with respect to engineering the active sites in heterogeneous zeolite-based catalysts and provide the perspectives on the development in this field.
Collapse
Affiliation(s)
- Dan Xu
- Energy Research Institute, School of Energy and Power Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, People's Republic of China
| | - Junqing Yin
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, People's Republic of China
| | - Ya Gao
- Energy Research Institute, School of Energy and Power Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, People's Republic of China
| | - Di Zhu
- Energy Research Institute, School of Energy and Power Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, People's Republic of China
| | - Shuyuan Wang
- Energy Research Institute, School of Energy and Power Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, People's Republic of China
| |
Collapse
|
7
|
Jarvis JS, Harrhy JH, Wang A, Bere T, Morgan DJ, Carter JH, Howe AGR, He Q, Hutchings GJ, Song H. Inhibiting the Dealkylation of Basic Arenes during n-Alkane Direct Aromatization Reactions and Understanding the C6 Ring Closure Mechanism. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02361] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Jack S. Jarvis
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Jonathan H. Harrhy
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Aiguo Wang
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Takudzwa Bere
- Cardiff Catalysis Institute, Department School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - David J. Morgan
- Cardiff Catalysis Institute, Department School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - James H. Carter
- Cardiff Catalysis Institute, Department School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Alexander G. R. Howe
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA #03-09, 117575, Singapore
| | - Qian He
- Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, Block EA #03-09, 117575, Singapore
| | - Graham J. Hutchings
- Cardiff Catalysis Institute, Department School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Hua Song
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| |
Collapse
|
8
|
He P, Chen Y, Jarvis J, Meng S, Liu L, Wen XD, Song H. Highly Selective Aromatization of Octane over Pt-Zn/UZSM-5: The Effect of Pt-Zn Interaction and Pt Position. ACS APPLIED MATERIALS & INTERFACES 2020; 12:28273-28287. [PMID: 32459461 DOI: 10.1021/acsami.0c07039] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The effects of Zn-Pt interaction and Pt dispersion over a uniform compact cylindrical shape ZSM-5 (UZSM-5) on the catalytic octane aromatization performance are investigated. The comparison between different Pt- and Zn-modified ZSM-5 catalysts demonstrates the significance of ZSM-5 morphology and, more importantly, the metal distributions on it. For the UZSM-5 support, Pt atoms prefer to occupy the sites within its inner pores, resulting in high selectivity to xylenes during the octane aromatization. The Zn deposit in inner pores and higher dispersion of Pt lead to the spillover of Pt sites to the external surface, which is critical for the activation of octane to produce reaction intermediates that are further converted to aromatics over the inner pore catalytic sites. These effects are evidenced by a diffuse reflection infrared Fourier transform spectroscopy study of CO adsorbed on the catalyst surface. In situ X-ray absorption fine structure spectra are collected to probe the coordination number and the chemical environment of Pt and Zn atoms in the catalysts during the octane aromatization reaction. Pt and Zn are well dispersed and stable during the reaction, and a partial reduction of Pt during the reaction is observed. A theoretical study using the density functional theory method predicts that the reaction and transition-state intermediates upon octane activation are better stabilized by Pt(111) of Pt external surface sites with a smaller activation barrier, indicating their significance in C-H activation. This hypothesis is further evidenced by comparing the octane aromatization performance of various modified catalysts through varying Zn loading, blocking inner pores, and covering the external catalytic sites with SiO2.
Collapse
Affiliation(s)
- Peng He
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW, Calgary, Alberta T2N 1N4, Canada
| | - Yunlei Chen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, China
- National Energy Center for Coal to Clean Fuel, Synfuels China Co., Ltd, Huairou District, Beijing 101400, China
| | - Jack Jarvis
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW, Calgary, Alberta T2N 1N4, Canada
| | - Shijun Meng
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW, Calgary, Alberta T2N 1N4, Canada
| | - Lijia Liu
- Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano and Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
| | - Xiao-Dong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, China
- National Energy Center for Coal to Clean Fuel, Synfuels China Co., Ltd, Huairou District, Beijing 101400, China
| | - Hua Song
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr NW, Calgary, Alberta T2N 1N4, Canada
| |
Collapse
|
9
|
Xu D, Wang S, Wu B, Zhang B, Qin Y, Huo C, Huang L, Wen X, Yang Y, Li Y. Highly Dispersed Single-Atom Pt and Pt Clusters in the Fe-Modified KL Zeolite with Enhanced Selectivity for n-Heptane Aromatization. ACS APPLIED MATERIALS & INTERFACES 2019; 11:29858-29867. [PMID: 31343150 DOI: 10.1021/acsami.9b08137] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Conversion of straight-chain paraffins into aromatics is particularly attractive but extremely challenging in the oil refining industry. Constructing the Pt-supported catalysts with high aromatic selectivity is vital. Here, we report a strategy to use Fe-modified KL zeolites to improve the Pt atom utilization efficiency and anchor them inside KL zeolite channels via atomic-layer deposition technique. A combination of highly dispersed single-atom Pt and electron-rich Pt clusters is fabricated on the KL zeolite through the creation of proper nucleation sites. The resulted catalyst (PtFe-1/KL) exhibits excellent performance for the n-heptane aromatization (90.1% aromatic selectivity) with an apparent activation energy of 131 kJ/mol and much enhanced stability at a relatively lower temperature (420 °C). Experimental analysis and density functional theory calculation demonstrate that the single-atom Pt might play a key role in the initial dehydrogenation of n-heptane to 1-heptene, and the superior stable Pt clusters encapsulated inside Fe-decorated KL zeolite channels accelerate the 1-heptene dehydrocyclization to aromatics. The synergetic interaction between single-atom Pt and Pt clusters enables the PtFe-1/KL catalyst to be one of the most effective n-heptane aromatization catalysts reported to date.
Collapse
Affiliation(s)
- Dan Xu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , People's Republic of China
- University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Shuyuan Wang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , People's Republic of China
- University of Chinese Academy of Sciences , Beijing 100049 , People's Republic of China
| | - Baoshan Wu
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , People's Republic of China
- National Energy Research Center for Clean Fuels , Synfuels China Co., Ltd. , Beijing 101400 , People's Republic of China
- Beijng Key Laboratory of Coal to Cleaning Liquid Fuels , Beijing 101400 , People's Republic of China
| | - Bin Zhang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , People's Republic of China
| | - Yong Qin
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , People's Republic of China
| | - Chunfang Huo
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , People's Republic of China
- National Energy Research Center for Clean Fuels , Synfuels China Co., Ltd. , Beijing 101400 , People's Republic of China
| | - Lihua Huang
- National Energy Research Center for Clean Fuels , Synfuels China Co., Ltd. , Beijing 101400 , People's Republic of China
| | - Xiaodong Wen
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , People's Republic of China
- National Energy Research Center for Clean Fuels , Synfuels China Co., Ltd. , Beijing 101400 , People's Republic of China
| | - Yong Yang
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , People's Republic of China
- National Energy Research Center for Clean Fuels , Synfuels China Co., Ltd. , Beijing 101400 , People's Republic of China
| | - Yongwang Li
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry , Chinese Academy of Sciences , Taiyuan 030001 , People's Republic of China
- National Energy Research Center for Clean Fuels , Synfuels China Co., Ltd. , Beijing 101400 , People's Republic of China
| |
Collapse
|
10
|
Dehydrogenation of Propane to Propylene Using Promoter-Free Hierarchical Pt/Silicalite-1 Nanosheets. Catalysts 2019. [DOI: 10.3390/catal9020174] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Propane dehydrogenation (PDH) is the extensive pathway to produce propylene, which is as a very important chemical building block for the chemical industry. Various catalysts have been developed to increase the propylene yield over recent decades; however, an active site of monometallic Pt nanoparticles prevents them from achieving this, due to the interferences of side-reactions. In this context, we describe the use of promoter-free hierarchical Pt/silicalite-1 nanosheets in the PDH application. The Pt dispersion on weakly acidic supports can be improved due to an increase in the metal-support interaction of ultra-small metal nanoparticles and silanol defect sites of hierarchical structures. This behavior leads to highly selective propylene production, with more than 95% of propylene selectivity, due to the complete suppression of the side catalytic cracking. Moreover, the oligomerization as a side reaction is prevented in the presence of hierarchical structures due to the shortening of the diffusion path length.
Collapse
|
11
|
Xu D, Wang S, Wu B, Huo C, Qin Y, Zhang B, Yin J, Huang L, Wen X, Yang Y, Li Y. Tailoring Pt locations in KL zeolite by improved atomic layer deposition for excellent performance in n-heptane aromatization. J Catal 2018. [DOI: 10.1016/j.jcat.2018.07.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
12
|
Li K, Chang Q, Yin J, Zhao C, Huang L, Tao Z, Yun Y, Zhang C, Xiang H, Yang Y, Li Y. Deactivation of Pt/KL catalyst during n-heptane aromatization reaction. J Catal 2018. [DOI: 10.1016/j.jcat.2018.03.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
13
|
Klerk AD. Zeolites as Catalysts for Fuels Refining after Indirect Liquefaction Processes. Molecules 2018; 23:molecules23010115. [PMID: 29316624 PMCID: PMC6017554 DOI: 10.3390/molecules23010115] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Revised: 12/30/2017] [Accepted: 01/01/2018] [Indexed: 11/16/2022] Open
Abstract
The use of zeolite catalysts for the refining of products from methanol synthesis and Fisher-Tropsch synthesis was reviewed. The focus was on fuels refining processes and differences in the application to indirect liquefaction products was compared to petroleum, which is often a case of managing different molecules. Processes covered were skeletal isomerisation of n-butenes, hydroisomerisation of n-butane, aliphatic alkylation, alkene oligomerisation, methanol to hydrocarbons, ethanol and heavier alcohols to hydrocarbons, carbonyls to hydrocarbons, etherification of alkenes with alcohols, light naphtha hydroisomerisation, catalytic naphtha reforming, hydroisomerisation of distillate, hydrocracking and fluid catalytic cracking. The zeolite types that are already industrially used were pointed out, as well as zeolite types that have future promise for specific conversion processes.
Collapse
Affiliation(s)
- Arno de Klerk
- Department of Chemical and Materials Engineering, University of Alberta, 9211-116th Street, Edmonton, AB T6G 1H9, Canada.
| |
Collapse
|
14
|
Zhao C, Wu B, Tao Z, Li K, Li T, Gao X, Huang L, Yun Y, Yang Y, Li Y. Synthesis of nano-sized LTL zeolite by addition of a Ba precursor with superior n-octane aromatization performance. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00661j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Nano-sized LTL zeolites obtained by the Ba-assisted method show improved catalytic performance in n-octane aromatization reaction.
Collapse
|
15
|
Shafer WD, Jacobs G, Graham UM, Pendyala VRR, Martinelli M, Thomas GA, Jermwongratanachai T, MacLennan A, Hu Y, Davis BH. Hexane Aromatization: Analysis of the K-Edges of S and K Provides New Insight into H2S Poisoning of Pt/KL. Catal Letters 2017. [DOI: 10.1007/s10562-017-2242-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
16
|
Zhu Q, Wang G, Liu J, Su L, Li C. Effect of Sn on Isobutane Dehydrogenation Performance of Ni/SiO 2 Catalyst: Adsorption Modes and Adsorption Energies of Isobutane and Isobutene. ACS APPLIED MATERIALS & INTERFACES 2017; 9:30711-30721. [PMID: 28805375 DOI: 10.1021/acsami.7b09482] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The reaction of isobutane over Ni/SiO2 catalyst changes from hydrogenolysis to dehydrogenation when Sn is introduced. The adsorption modes and energies of isobutane and isobutene over the Ni/SiO2 catalyst with and without Sn addition were determined by in situ FTIR and a novel transient response adsorption approach. In the absence of Sn, isobutane is adsorbed in a double-site mode with H atoms in two methyl groups of isobutane, facilitating hydrogenolysis of isobutane. After the addition of Sn, a single-site adsorption mode with the H atom in the methylidyne group is speculated instead, which is beneficial to the rupture of the C-H bond rather than the C-C bond. Moreover, the double-site adsorption mode of isobutene with the C═C bond and the H atom in a methyl group is turned into single-site mode with the C═C bond after the introduction of Sn. As for the adsorption energy of isobutene, the introduction of Sn leads to an obvious decrease from 74 to 50 kJ mol-1 and facilitates the prompt desorption of isobutene, resulting in a high selectivity of 81.9 wt %.
Collapse
Affiliation(s)
- Qingqing Zhu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao, 266580, China
| | - Guowei Wang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao, 266580, China
| | - Jianwei Liu
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao, 266580, China
| | - Lushu Su
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao, 266580, China
| | - Chunyi Li
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum , Qingdao, 266580, China
| |
Collapse
|
17
|
Ma Z, Hu H, Sun Z, Fang W, Zhang J, Yang L, Zhang Y, Wang L. Acidic Zeolite L as a Highly Efficient Catalyst for Dehydration of Fructose to 5-Hydroxymethylfurfural in Ionic Liquid. CHEMSUSCHEM 2017; 10:1669-1674. [PMID: 28272798 DOI: 10.1002/cssc.201700239] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2017] [Revised: 03/06/2017] [Indexed: 06/06/2023]
Abstract
Zeolite L was synthesized by the hydrothermal method and post-treated by NH4 exchange to adjust its acidity. The samples were systematic characterized by various techniques including XRD, X-ray fluorescence spectroscopy, N2 adsorption-desorption, scanning electron microscopy, pyridine IR spectroscopy, and NH3 temperature-programmed desorption. The results demonstrated that the NH4 -exchange post-treatment increased the surface area, micropore volume, and acidity of zeolite L. The catalytic performance of the samples was tested in the dehydration of fructose to 5-hydroxymethylfurfural (HMF) in ionic liquid (1-butyl-3-methylimidazolium bromide, [bmim]Br). 99.1 % yield of HMF was obtained when the KL-80 °C-1 h sample (KL zeolite treated with 1 m NH4 NO3 solution at 80 °C for 1 h) was used. The high efficiency could be attributed to the appropriate acid properties of the catalyst. The zeolite catalyst could be reused four times without significant decrease in activity.
Collapse
Affiliation(s)
- Zhongsen Ma
- Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China
| | - Hualei Hu
- Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China
| | - Zhongqiang Sun
- Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China
| | - Wenting Fang
- Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China
| | - Jian Zhang
- Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China
| | - Longfei Yang
- Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China
| | - Yajie Zhang
- Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China
| | - Lei Wang
- Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, Ningbo, 315201, P.R. China
| |
Collapse
|
18
|
Xu D, Wu B, Ren P, Wang S, Huo C, Zhang B, Guo W, Huang L, Wen X, Qin Y, Yang Y, Li Y. Controllable deposition of Pt nanoparticles into a KL zeolite by atomic layer deposition for highly efficient reforming of n-heptane to aromatics. Catal Sci Technol 2017. [DOI: 10.1039/c6cy02652d] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Small-sized Pt particles inside KL zeolite channels are supposed to facilitate the dehydrogenation and cyclization of n-heptane.
Collapse
|