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学者姓名:王婵
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A scrics of TS-1 zeolites were prepared by varying the addilions of seeds. The physicochemical properties of the synthesized TS-1 zeolites were systematically characterized by several analytical techniques, including X-ray diffraction, scanning electron microscopy, UV visiblc diffuser reflectance spectroscopy, Fourier transformed infrared spectroscopy, X-ray fluorescence spectroscopy and solid-statc nuclcar magnetie resonance spectroscopy. Morcovcr, the catalytic Performance and regeneration properties of the synthesized TS-1 zeolites in the one-step synthesis of ethylene glycol (EG) from ethylene was thoroughly evaluated. The results demonstrate that the addition of seeds can help improve the crystallinity of the synthesized samplcs. Spccifically, when the seeds mass fraction is 5%, the synthesized TS-1 zcolitc owns the highest Proportion of open framework titanium Ti—OH(HO—Si)3 species and strong Lewis aeid strength. When used in the one-step synthesis of EG from ethylene, this TS-1 zcolite exhibits excellcnt catalytic Performance, i. e., under the dosagc of catalyst of 0. 3 g, ethylene pressure of 2. 5 MPa, and temperaturc of 60 °C, H2()2 conversion rate is 91.1%, H202 utilization rate is 87.2%, and EG selectivity is 89. 8%. Furthermore, through investigating the regeneration properties of zeolites, it is found that thc synthesized optimal TS-1 zcolitc can be regenerated by calcination, and its catalytic Performance remains basically stablc aftcr bcing rcuscd for 5 times in thc one-step synthesis of EG from ethylene. © 2025 Editorial Office of Acta Petrolei Sinica. All rights reserved.
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Fluorescence spectroscopy Fluorescence spectroscopy Fourier transform infrared spectroscopy Fourier transform infrared spectroscopy Nuclear magnetic resonance spectroscopy Nuclear magnetic resonance spectroscopy
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GB/T 7714 | Zhang, Ting , Dong, Peng , Wang, Chan et al. Synthesis of TS-1 Zeolites Rieh in Open Framework Titanium and Their Catalytic Performance for One-Step Synthesis of Ethylene Glycol From Ethylene [J]. | Acta Petrolei Sinica (Petroleum Processing Section) , 2025 , 41 (3) : 627-639 . |
MLA | Zhang, Ting et al. "Synthesis of TS-1 Zeolites Rieh in Open Framework Titanium and Their Catalytic Performance for One-Step Synthesis of Ethylene Glycol From Ethylene" . | Acta Petrolei Sinica (Petroleum Processing Section) 41 . 3 (2025) : 627-639 . |
APA | Zhang, Ting , Dong, Peng , Wang, Chan , Yue, Yuanyuan . Synthesis of TS-1 Zeolites Rieh in Open Framework Titanium and Their Catalytic Performance for One-Step Synthesis of Ethylene Glycol From Ethylene . | Acta Petrolei Sinica (Petroleum Processing Section) , 2025 , 41 (3) , 627-639 . |
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Hierarchical SAPO-11, featuring both micropore and mesopore channels, demonstrates an outstanding performance in high-octane gasoline production. In this work, we propose an economic and effective approach to directly fabricate hierarchical SAPO-11 molecular sieve from natural kaolin, eliminating the need for mesoporogens. The systematic characterization results show that the kaolin-derived SAPO-11 possesses abundant micro-mesoporous structure and more Br & oslash;nsted (B) acid sites on the external surface in contrast with the conventional SAPO-11 prepared employing silica sol as silicon source as well as SAPO-11 synthesized with the assist with of poly(ethylene oxide)-block-poly(propylene oxide)-blockpoly(ethylene oxide) (F127). The analysis of the formation process reveals that the kaolin not only provides silicon source for the SAPO-11 crystal growth, but also offers confined environment for crystal growth along the preferential orientation, resulting in the generation of the microporous and mesoporous structure. Benefiting from these unique properties, the kaolin-derived Pt/SAPO-11 exhibits considerably improved selectivity for di-branched C8 isomers in n-octane hydroisomerization. (c) 2024 The Authors. Publishing services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/ 4.0/).
Keyword :
Hierarchical pore Hierarchical pore High-octane gasoline High-octane gasoline Hydroisomerization Hydroisomerization Kaolin Kaolin SAPO-11 SAPO-11
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GB/T 7714 | Wang, Chan , Chi, Zhao-Quan , Liu, Shu et al. Mesoporogen-free synthesis of hierarchical SAPO-11 from kaolin for hydroisomerization of n-alkanes [J]. | PETROLEUM SCIENCE , 2025 , 22 (3) : 1370-1379 . |
MLA | Wang, Chan et al. "Mesoporogen-free synthesis of hierarchical SAPO-11 from kaolin for hydroisomerization of n-alkanes" . | PETROLEUM SCIENCE 22 . 3 (2025) : 1370-1379 . |
APA | Wang, Chan , Chi, Zhao-Quan , Liu, Shu , Tan, Si-Jia , Xu, Jing-Dong , Li, Tie-Sen et al. Mesoporogen-free synthesis of hierarchical SAPO-11 from kaolin for hydroisomerization of n-alkanes . | PETROLEUM SCIENCE , 2025 , 22 (3) , 1370-1379 . |
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Adsorptive separation, which relies on the size, polarity, and affinity of guest molecules, is an efficient, eco-friendly, and cost-effective method. Zeolite-based adsorbents, known for their uniform pore size and regenerability, have exhibited exceptional performance in many challenging adsorption processes, such as the separation of n-paraffin/i-paraffin and xylene isomers. Ion exchange, as an essential piece in the fabrication of zeolite-based adsorbents, significantly affects overall performance. In this review, we survey the recent key developments and issues within ion exchange research of zeolite-based adsorbents, including the solution pH, solution concentration, ion-exchange cycles, ion-exchange temperature, ion-exchange time, calcination temperature, and discuss the mechanisms of their influence on zeolite adsorption. This review also elaborates on the negative effects of improper ion exchange on incomplete cation exchange, cation migration, collapse of the zeolite structure, and blockage of zeolite pores. Other parameters that lack research but have been proven to affect ion exchange are also mentioned. We hope to generate interest in the wider community and encourage others to make use of ion exchange in tackling challenges of adsorption separation science and engineering.
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GB/T 7714 | Li, Chenxin , Li, Tiesen , Cui, Qingyan et al. Ion exchange: an essential piece in the fabrication of zeolite adsorbents [J]. | PHYSICAL CHEMISTRY CHEMICAL PHYSICS , 2025 , 27 (30) . |
MLA | Li, Chenxin et al. "Ion exchange: an essential piece in the fabrication of zeolite adsorbents" . | PHYSICAL CHEMISTRY CHEMICAL PHYSICS 27 . 30 (2025) . |
APA | Li, Chenxin , Li, Tiesen , Cui, Qingyan , Wang, Tinghai , Wang, Chan , Yang, Jiao et al. Ion exchange: an essential piece in the fabrication of zeolite adsorbents . | PHYSICAL CHEMISTRY CHEMICAL PHYSICS , 2025 , 27 (30) . |
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A seed-directed approach to synthesizing FeZSM-22 zeolite without organic structure directing agent(OSDA)was developed by using Fe-rich diatomite as all aluminum and iron sources.The FeZSM-22 zeolite with optimal crystallinity and purity can be obtained by systematically adjusting feed composi-tion and synthesis conditions.Characterizations show that FeZSM-22 zeolite synthesized with OSDA-free owns high crystallinity,obvious thin needle-shaped morphology and high Bronsted/Lewis acid ratio.Significantly,when used for n-octane hydroisomerization reaction,its derived catalyst exhibits the best catalytic performance reflected by the highest selectivity to C8 isomers compared to the two reference catalysts prepared based on a Fe-containing and a Fe-free ZSM-22 synthesized through an OSDA-directed route from natural diatomite and conventional chemicals,respectively.This work provides an alternative route to sustainably synthesizing heteroatomic zeolites with high performance.
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GB/T 7714 | Tiesen Li , Ting Chen , Yinghui Ye et al. OSDA-free synthesis of FeZSM-22 zeolite from natural minerals for n-octane hydroisomerization [J]. | 中国化学工程学报(英文版) , 2024 , 66 (2) : 51-59 . |
MLA | Tiesen Li et al. "OSDA-free synthesis of FeZSM-22 zeolite from natural minerals for n-octane hydroisomerization" . | 中国化学工程学报(英文版) 66 . 2 (2024) : 51-59 . |
APA | Tiesen Li , Ting Chen , Yinghui Ye , Peng Dong , Tinghai Wang , Qingyan Cui et al. OSDA-free synthesis of FeZSM-22 zeolite from natural minerals for n-octane hydroisomerization . | 中国化学工程学报(英文版) , 2024 , 66 (2) , 51-59 . |
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FAU-type zeolites are an important class of porous aluminosilicate materials with a 3-dimiensional network of accessible micropores (0.74 nm), which primarily encompass X and Y zeolites. Typically, FAU zeolite with a framework SiO2/Al(2)O3 molar ratio between 2.0 and 3.0 is called X zeolite, and that is greater than 3.0 is classified as Y zeolite. Due to their distinctive structure and pore characteristics, FAU-type zeolites have emerged as one of the most widely used catalysts, catalyst carriers, and adsorbents in the chemical industry. However, the sole microporous channels of the conventional FAU-type zeolites not only make them difficult for the reactions involving bulky molecules to occur within pore channel, leading to insufficient contact between reactants with active sites of the zeolite, but also restrict the diffusion of product within the zeolite, thus affecting the activity and lifetime of the catalyst. Therefore, the key to improving the performance of FAU-type zeolites lies in alleviating the adverse effects of micropore diffusion on mass transfer. Introducing mesopores and/or macropores into microporous zeolites to construct hierarchical zeolites with a multi-modal pore structure is believed to be a promising approach. This modification not only can preserve the active sites from the microporous structure, but also significantly enhances the diffusion rate of guest molecules within the zeolites. Consequently, researchers have concentrated on the preparation and application of hierarchical zeolites. This article focuses on the current research status on the preparation of hierarchical X and Y zeolites based on "bottom-up" direct synthesis and "top-down" post-treatment methods. The direct synthesis method mainly comprises template and template-free methods. In terms of the template method, the pore structure of FAU zeolites can be tailored by altering the nature of the templating agent, synthesis conditions and so on. Differently, the template-free method enables the preparation of hierarchical FAU zeolites without the addition of any template. In particular, hierarchical X and Y zeolites have been successfully synthesized directly from natural aluminosilicate minerals without the use of organic templates, which not only reduces the synthesis cost of hierarchical zeolites from raw materials, but also contributes to environmental protection. This method provides a novel synthetic pathway for the preparation of hierarchical zeolites in a low-cost and green way. On the other hand, posttreatment method based on desilication and dealumination is the main method for the preparation of hierarchical Y zeolite, whereas few researchers have made use of post-treatment method to introduce meso/macroporous structures into X zeolite because of the poor chemical stability of X zeolite. In addition, the article introduces the application performance of hierarchical X and Y zeolites in adsorption, catalysis as well as other reaction processes. Despite the superior diffusion capabilities of hierarchical FAU-type zeolites, there are several problemsincluding high cost of organic templates and pollution emissions from the removal of template in the process of synthesizing hierarchical zeolites based on template method, limiting the industrial application of this method. As a result, designing cheap and recyclable templates is the key to realizing green and low-cost preparation of hierarchical FAU-type zeolite. Furthermore, post-treatment method cannot achieve the regulation of mesoporous size in hierarchical zeolites. Future research should deeply investigate the structureactivity relationship between the pore structure and reaction performance of hierarchical FAU-type zeolites, so as to further open pore channels, and enhance diffusion, thus promoting the development of hierarchical FAU-type zeolites in industrial applications.
Keyword :
adsorption adsorption catalysis catalysis direct synthesis direct synthesis hierarchical FAU-type zeolites hierarchical FAU-type zeolites post treatment post treatment
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GB/T 7714 | Dong, Peng , Zhu, Lin , Luo, Longhua et al. Research progress in the synthesis and application of hierarchical FAU-type zeolites [J]. | CHINESE SCIENCE BULLETIN-CHINESE , 2024 , 69 (19) : 2718-2728 . |
MLA | Dong, Peng et al. "Research progress in the synthesis and application of hierarchical FAU-type zeolites" . | CHINESE SCIENCE BULLETIN-CHINESE 69 . 19 (2024) : 2718-2728 . |
APA | Dong, Peng , Zhu, Lin , Luo, Longhua , Li, Tiesen , Wang, Tinghai , Wang, Chan et al. Research progress in the synthesis and application of hierarchical FAU-type zeolites . | CHINESE SCIENCE BULLETIN-CHINESE , 2024 , 69 (19) , 2718-2728 . |
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A seed-directed approach to synthesizing FeZSM-22 zeolite without organic structure directing agent (OSDA) was developed by using Fe-rich diatomite as all aluminum and iron sources. The FeZSM-22 zeolite with optimal crystallinity and purity can be obtained by systematically adjusting feed composition and synthesis conditions. Characterizations show that FeZSM-22 zeolite synthesized with OSDA-free owns high crystallinity, obvious thin needle-shaped morphology and high Bronsted/Lewis acid ratio. Significantly, when used for n-octane hydroisomerization reaction, its derived catalyst exhibits the best catalytic performance reflected by the highest selectivity to C-8 isomers compared to the two reference catalysts prepared based on a Fe-containing and a Fe-free ZSM-22 synthesized through an OSDA-directed route from natural diatomite and conventional chemicals, respectively. This work provides an alternative route to sustainably synthesizing heteroatomic zeolites with high performance. (c) 2023 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.
Keyword :
FeZSM-22 zeolite FeZSM-22 zeolite Natural minerals Natural minerals n-octane hydroisomerization n-octane hydroisomerization OSDA-free synthesis OSDA-free synthesis
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GB/T 7714 | Li, Tiesen , Chen, Ting , Ye, Yinghui et al. OSDA-free synthesis of FeZSM-22 zeolite from natural minerals for n-octane hydroisomerization [J]. | CHINESE JOURNAL OF CHEMICAL ENGINEERING , 2024 , 66 : 51-59 . |
MLA | Li, Tiesen et al. "OSDA-free synthesis of FeZSM-22 zeolite from natural minerals for n-octane hydroisomerization" . | CHINESE JOURNAL OF CHEMICAL ENGINEERING 66 (2024) : 51-59 . |
APA | Li, Tiesen , Chen, Ting , Ye, Yinghui , Dong, Peng , Wang, Tinghai , Cui, Qingyan et al. OSDA-free synthesis of FeZSM-22 zeolite from natural minerals for n-octane hydroisomerization . | CHINESE JOURNAL OF CHEMICAL ENGINEERING , 2024 , 66 , 51-59 . |
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Platinum nanoparticles (Pt NPs) embedded in the multi-hollow silicalite-1 zeolite (Pt@MH-S-1) were prepared by the sequential alkali etching and recrystallization of parent microporous silicalite-1 zeolite. Then, toluene and acetone were employed as probe molecules to determine the catalytic behavior of Pt@MH-S-1 for the elimination of volatile organic compounds (VOCs). The results reveal that Pt@MH-S-1 with multi-hollow structure owns large external specific surface area for dispersing the Pt NPs, and abundant mesoporous channels for improving the accessibility of toluene to Pt NPs as well as high reactive oxygen content, excellent toluene adsorption capacity and moderate adsorption strength. Owing to these characteristics, Pt@MH-S-1 exhibits superior performance both in toluene and acetone catalytic oxidations as reflected by 100% conversion acquired at even a low temperature of 137 and 180 degrees C, respectively. Moreover, Pt@MH-S-1 also shows good stability toward the various conditions, signifying its superiority and potential in practical application for VOCs treatment.
Keyword :
Catalytic oxidation Catalytic oxidation Multi-hollow silicalite-1 Multi-hollow silicalite-1 Pt nanoparticles Pt nanoparticles Volatile organic compounds Volatile organic compounds
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GB/T 7714 | Tang, Siyao , Liu, Haiyan , Li, Tiesen et al. Encapsulating platinum nanoparticles into multi-hollow silicalite-1 zeolite for catalytic oxidation of volatile organic compounds [J]. | CHEMICAL ENGINEERING SCIENCE , 2024 , 286 . |
MLA | Tang, Siyao et al. "Encapsulating platinum nanoparticles into multi-hollow silicalite-1 zeolite for catalytic oxidation of volatile organic compounds" . | CHEMICAL ENGINEERING SCIENCE 286 (2024) . |
APA | Tang, Siyao , Liu, Haiyan , Li, Tiesen , Wang, Chan , Cui, Qingyan , Yue, Yuanyuan et al. Encapsulating platinum nanoparticles into multi-hollow silicalite-1 zeolite for catalytic oxidation of volatile organic compounds . | CHEMICAL ENGINEERING SCIENCE , 2024 , 286 . |
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The SO2 poisoning of a heterobimetallic FeCu-SSZ-13 in selective catalytic reduction of NO with NH3 (NH3-SCR) was systematically investigated in this study. It was shown that when SO2 is involved in the feeding flue gas, the losses in the redox ability of active metals (primary contributor to deactivation) and in the number of Bronsted acid sites both inhibit the formation of NH4NO2 intermediate, resulting in the rapid deactivation of FeCu-SSZ-13. The SO2 poisoning of FeCu-SSZ-13 at low temperature is more serious than at high temperature, because of the more severe loss of redox ability of active metals. Unlike that of monometallic Cu-/Fe-CHA, the SO(2 )poisoning of the bimetallic one is saliently featured by that partial SO2 is oxidized to SO3 and partial Bronsted acid sites are destroyed due to the formation of H2SO4. This work may provide a fundamental understanding on the SO2 poisoning of heterobimetallic zeolite-based NH3-SCR catalysts.
Keyword :
bimetallic FeCu-SSZ-13 bimetallic FeCu-SSZ-13 mechanism mechanism regeneration ability regeneration ability selective catalytic reduction selective catalytic reduction SO2 poisoning SO2 poisoning
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GB/T 7714 | Lin, Zheguan , Wang, Chan , Li, Tiesen et al. Insight into the SO2 poisoning of heterobimetallic FeCu-SSZ-13 zeolite in NH3-SCR reaction [J]. | AICHE JOURNAL , 2024 , 70 (3) . |
MLA | Lin, Zheguan et al. "Insight into the SO2 poisoning of heterobimetallic FeCu-SSZ-13 zeolite in NH3-SCR reaction" . | AICHE JOURNAL 70 . 3 (2024) . |
APA | Lin, Zheguan , Wang, Chan , Li, Tiesen , Zhu, Haibo , Jiang, Lilong , Yue, Yuanyuan et al. Insight into the SO2 poisoning of heterobimetallic FeCu-SSZ-13 zeolite in NH3-SCR reaction . | AICHE JOURNAL , 2024 , 70 (3) . |
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FAU型分子筛因其独特的孔道结构已成为化学工业中应用最广泛、用量最大的催化剂、催化剂载体及吸附剂之一.然而, FAU型分子筛单一的微孔孔道限制了客体分子的扩散,导致其性能严重下降.相比之下,等级孔FAU型分子筛具有微-介/大孔复合的多级孔道结构,能够促进大分子的扩散、提高活性位点的可接近性,进而改善其吸附和催化性能.目前,等级孔分子筛的制备方法主要包括“自下而上”的直接合成法和“自上而下”的后处理法.本文主要介绍了近年来等级孔X型和Y型分子筛制备方法的研究现状,重点总结了等级孔X型和Y型分子筛在吸附、催化等过程中的应用性能,并对等级孔FAU型分子筛的绿色化制备进行展望.
Keyword :
催化 催化 后处理 后处理 吸附 吸附 直接合成 直接合成 等级孔FAU型分子筛 等级孔FAU型分子筛
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GB/T 7714 | 董鹏 , 朱琳 , 骆龙华 et al. 等级孔FAU型分子筛的制备及应用的研究进展 [J]. | 科学通报 , 2024 , 69 (19) : 2718-2728 . |
MLA | 董鹏 et al. "等级孔FAU型分子筛的制备及应用的研究进展" . | 科学通报 69 . 19 (2024) : 2718-2728 . |
APA | 董鹏 , 朱琳 , 骆龙华 , 李铁森 , 王廷海 , 王婵 et al. 等级孔FAU型分子筛的制备及应用的研究进展 . | 科学通报 , 2024 , 69 (19) , 2718-2728 . |
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Correction for 'Comparative environmental assessment of zeolites synthesized from chemicals and natural minerals' by Xiaoling Chen et al., Green Chem., 2024, 26, 5273-5283, https://doi.org/10.1039/D3GC05146C.
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GB/T 7714 | Chen, Xiaoling , Xiao, Guoxi , Li, Tiesen et al. Comparative environmental assessment of zeolites synthesized from chemicals and natural minerals (vol 26, pg 5273, 2024) [J]. | GREEN CHEMISTRY , 2024 , 26 (14) : 8428-8429 . |
MLA | Chen, Xiaoling et al. "Comparative environmental assessment of zeolites synthesized from chemicals and natural minerals (vol 26, pg 5273, 2024)" . | GREEN CHEMISTRY 26 . 14 (2024) : 8428-8429 . |
APA | Chen, Xiaoling , Xiao, Guoxi , Li, Tiesen , Wang, Chan , Cui, Qingyan , Bao, Xiaojun et al. Comparative environmental assessment of zeolites synthesized from chemicals and natural minerals (vol 26, pg 5273, 2024) . | GREEN CHEMISTRY , 2024 , 26 (14) , 8428-8429 . |
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