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学者姓名：王婵
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Abstract ：
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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Abstract ：
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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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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Synthesizing zeolites, which are important materials used in the petroleum and chemical industries, from natural aluminosilicate minerals has been qualitatively recognized as a greener approach compared to that from traditional Si- and Al-containing chemicals; however, studies on the quantitative environmental impacts are still lacking. Herein, life cycle assessment (LCA) and green metrics (atom economy and environmental factor) were employed to comparatively assess the life cycle environmental impacts of zeolites synthesized from chemicals and natural minerals at the industrial scale. The values of seven LCA impact categories and sensitivity analysis between them were thoroughly compared. The results showed that, for each category, the synthesis from natural minerals has lower environmental impacts to varying degrees than that from chemicals. Further efficiency analysis of zeolite manufacturing technologies by green metrics indicated that the synthesis from natural minerals outperforms that from chemicals in terms of the resource utilization rate. The quantitative results indicate that significant benefits stem from the replacement of raw materials from chemicals to natural minerals. This work may provide a basis for the future selection and upgrade of zeolite production processes. Life cycle assessment and green metrics were used to comparatively assess the synthesis of zeolites from natural minerals and chemicals in which the former exhibits a better balance between efficiency and environmental impacts than the latter.
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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 [J]. | GREEN CHEMISTRY , 2024 , 26 (9) : 5273-5283 . |
| MLA | Chen, Xiaoling et al. "Comparative environmental assessment of zeolites synthesized from chemicals and natural minerals" . | GREEN CHEMISTRY 26 . 9 (2024) : 5273-5283 . |
| 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 . | GREEN CHEMISTRY , 2024 , 26 (9) , 5273-5283 . |
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Abstract ：
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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The development of sustainable techniques to produce high-performance zeolite is essential to achieve green production in industry. Herein, we report an eco-friendly route to synthesizing hierarchical Beta zeolite from kaolinite and recycled mother liquor. The results reveal that the unutilized species (such as silicon species and Na+) in mother liquor stayed in a stable concentration during eleven recycled experiments. Moreover, the synthesized Beta zeolites still have comparable physicochemical properties and catalytic performance in the esterification of levulinic acid with ethanol over the initial zeolite although eleven recycled experiments. Life cycle assessment exhibits that the synthesis of Beta zeolite with recycled mother liquor can reduce global warming potential by 23% and resource depletion-water use by 36% compared to that without recycled mother liquor. This quantitatively demonstrates that the approach proposed in this work is really a sustainable one, extremely increasing the utilization efficiency of raw materials and decreasing the environmental burden. © 2024 Institute of Process Engineering, Chinese Academy of Sciences.
Keyword ：
Eco-friendly synthesis Eco-friendly synthesis Hierarchical Beta zeolite Hierarchical Beta zeolite Life cycle assessment Life cycle assessment Recycled mother liquor Recycled mother liquor
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| GB/T 7714 | Xiao, G. , Chen, X. , Li, T. et al. Eco-friendly synthesis and environmental impact assessment of hierarchical Beta zeolite from kaolinite and recycled mother liquor [J]. | Green Chemical Engineering , 2024 , 5 (4) : 501-510 . |
| MLA | Xiao, G. et al. "Eco-friendly synthesis and environmental impact assessment of hierarchical Beta zeolite from kaolinite and recycled mother liquor" . | Green Chemical Engineering 5 . 4 (2024) : 501-510 . |
| APA | Xiao, G. , Chen, X. , Li, T. , Wang, C. , Cui, Q. , Yue, Y. . Eco-friendly synthesis and environmental impact assessment of hierarchical Beta zeolite from kaolinite and recycled mother liquor . | Green Chemical Engineering , 2024 , 5 (4) , 501-510 . |
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Abstract ：
The development of sustainable techniques to produce high-performance zeolite is essential to achieve green production in industry.Herein,we report an eco-friendly route to synthesizing hierarchical Beta zeolite from kaolinite and recycled mother liquor.The results reveal that the unutilized species(such as silicon species and Na+)in mother liquor stayed in a stable concentration during eleven recycled experiments.Moreover,the syn-thesized Beta zeolites still have comparable physicochemical properties and catalytic performance in the esteri-fication of levulinic acid with ethanol over the initial zeolite although eleven recycled experiments.Life cycle assessment exhibits that the synthesis of Beta zeolite with recycled mother liquor can reduce global warming potential by 23％and resource depletion-water use by 36％compared to that without recycled mother liquor.This quantitatively demonstrates that the approach proposed in this work is really a sustainable one,extremely increasing the utilization efficiency of raw materials and decreasing the environmental burden.
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| GB/T 7714 | Guoxi Xiao , Xiaoling Chen , Tiesen Li et al. Eco-friendly synthesis and environmental impact assessment of hierarchical Beta zeolite from kaolinite and recycled mother liquor [J]. | 绿色化学工程（英文） , 2024 , 5 (4) : 501-510 . |
| MLA | Guoxi Xiao et al. "Eco-friendly synthesis and environmental impact assessment of hierarchical Beta zeolite from kaolinite and recycled mother liquor" . | 绿色化学工程（英文） 5 . 4 (2024) : 501-510 . |
| APA | Guoxi Xiao , Xiaoling Chen , Tiesen Li , Chan Wang , Qingyan Cui , Yuanyuan Yue . Eco-friendly synthesis and environmental impact assessment of hierarchical Beta zeolite from kaolinite and recycled mother liquor . | 绿色化学工程（英文） , 2024 , 5 (4) , 501-510 . |
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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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In order to develop a high-efficiency iron oxide catalyst for the slurry-phase hydrocracking of poor heavy oil, the mesoporous iron oxide was successfully synthesized by using the waste wood powder as a template, and the influence of alkali concentration in the resulting solution on crystal phase, morphology and pore structure of the synthesized samples was investigated. The crystal phase of the synthesized iron oxide transfers from alpha-Fe2O3 to gamma-Fe2O3, and their crystal sizes gradually decrease with an increase of alkali concentration based on the XRD and HRTEM results. Additionally, the iron oxide with mesoporous structure, larger surface area and pore volume is obtained at the higher concentration of alkali in solution confirmed by N2 adsorption-desorption analysis. The assessment result of the iron oxide catalyst employed in the slurry-phase hydrocracking of vacuum residue (VR) illustrates that the yields of gasoline and diesel distillates obtained over Fe-O-B20, Fe-O-B24 and Fe-O-B30 cata-lysts are higher compared with those over Fe-O-B2 and Fe-O-B14 catalysts, it can be attributed that more exposure Fe active sites derived from their larger surface area and pore volume availably improve the catalyst hydroge-nation activity, which can inhibit the over-cracking reaction of intermediate products and the condensation of polycyclic aromatic hydrocarbon in VR to enhance the yields of gasoline and diesel distillates.
Keyword ：
Iron oxide catalyst Iron oxide catalyst Mesoporous Mesoporous Slurry-phase hydrocracking Slurry-phase hydrocracking Synthesis Synthesis Vacuum residue Vacuum residue
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| GB/T 7714 | Hu, Xiubin , Wang, Jianbo , Wang, Tinghai et al. Synthesis and performance of mesoporous iron oxide in vacuum residue slurry-phase hydrocracking [J]. | FUEL , 2023 , 332 . |
| MLA | Hu, Xiubin et al. "Synthesis and performance of mesoporous iron oxide in vacuum residue slurry-phase hydrocracking" . | FUEL 332 (2023) . |
| APA | Hu, Xiubin , Wang, Jianbo , Wang, Tinghai , Wang, Chan , Zhang, Hongwei , Yuan, Pei et al. Synthesis and performance of mesoporous iron oxide in vacuum residue slurry-phase hydrocracking . | FUEL , 2023 , 332 . |
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A sustainable defect-engineering strategy for the dealumination of Y zeolite is described. This strategy includes the green synthesis of a well-crystallized Y zeolite with point defects arising from the incorporation of Fe atoms by using Fe-containing perlite and the subsequent preparation of ultra-stable Y (USY) zeolite by efficient steaming dealumination. The systematic characterizations verify that Fe atoms originally existing in the perlite are incorporated into the as-synthesized Y zeolite and function as point defects, leading to the distortion of framework Al. The step-by-step investigation of dealumination process shows that vacancies are formed by the extraction of framework Fe in ammonium exchange, and the framework dealumination is promoted under the combined effect of the distorted framework Al and the formed vacancies during steaming treatment. The resulting USY zeolite owns excellent features in (hydro)thermal stability, pore structure and acid property, and exhibits outstanding catalytic performance in the cracking of n-octane and 1,3,5-triisopropylbenzene.
Keyword ：
catalytic cracking catalytic cracking dealumination dealumination defect engineering defect engineering USY zeolite USY zeolite Y zeolite Y zeolite
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| GB/T 7714 | Dong, Peng , Zhang, Jinyu , Li, Tiesen et al. Dealumination of Y zeolite through an economic and eco-friendly defect-engineering strategy [J]. | AICHE JOURNAL , 2023 , 69 (9) . |
| MLA | Dong, Peng et al. "Dealumination of Y zeolite through an economic and eco-friendly defect-engineering strategy" . | AICHE JOURNAL 69 . 9 (2023) . |
| APA | Dong, Peng , Zhang, Jinyu , Li, Tiesen , Wang, Chan , Xu, Jingdong , Wang, Tinghai et al. Dealumination of Y zeolite through an economic and eco-friendly defect-engineering strategy . | AICHE JOURNAL , 2023 , 69 (9) . |
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