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学者姓名：李铁森
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Abstract ：
A low-cost and process-intensified synthesis approach of SSZ-35 zeolite via a seed-assisted method is presented. This approach involves the development of a relatively inexpensive template and the application of seeds to minimize crystallization time and template consumption. Herein, N-Ethyl, N-methyl 2,6-cis-dimethylpiperidinium hydroxide (EMDMPOH) is selected as a template to synthesize SSZ-35 zeolite, and a simplified and optimized scheme for the preparation of such a template is proposed. Specially, the high-purity EMDMPOH is prepared by a sequential alkylation of 2,6-dimethylpiperidine with iodoethane and iodomethane, followed by ion exchange. By employing a seed-assisted strategy, the synthesis process of SSZ-35 zeolite is intensified, resulting in a significant reduction in crystallization time from 7 d to 75 h. Systematic characterizations reveal that the synthesized SSZ-35 zeolite has smaller crystals and larger specific surface area in comparison with the reference sample, leading to enhanced selectivity in n-octane hydroisomerization. Moreover, the cost accounting analysis shows a notable decrease in the synthesis cost of SSZ-35 zeolite by using the synthesis route that combines the simplified process for preparing the template and the reduced amount of template.
Keyword ：
Crystallization intensification Crystallization intensification Low-cost synthesis Low-cost synthesis Seed-assisted method Seed-assisted method SSZ-35 zeolite SSZ-35 zeolite
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| GB/T 7714 | Dong, Peng , Wu, Huanliu , Luo, Longhua et al. Low-cost and efficient synthesis of SSZ-35 zeolite through a seed-assisted approach [J]. | CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION , 2025 , 208 . |
| MLA | Dong, Peng et al. "Low-cost and efficient synthesis of SSZ-35 zeolite through a seed-assisted approach" . | CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION 208 (2025) . |
| APA | Dong, Peng , Wu, Huanliu , Luo, Longhua , Cui, Qingyan , Li, Tiesen , Shi, Jie et al. Low-cost and efficient synthesis of SSZ-35 zeolite through a seed-assisted approach . | CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION , 2025 , 208 . |
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In order to gain insight into the influence of SiO2 support particle size on the vacuum residue (VR) slurry-phase hydrocracking performance of Fe-based catalysts, a series of FeZn/SiO2 catalysts with varying SiO2 particle sizes were prepared. Characterization results show that the surface area and pore volume of the FeZn/SiO2 catalysts increase with the reduction of SiO2 particle sizes. The metals Fe and Zn species on FeZn/SiO2-S catalyst are more readily reducible via H2-TPR analysis. Notably, FeZn/SiO2-S catalyst presents higher metal dispersion and a greater degree of sulfurization compared to the other catalysts by XRD and XPS. Hydrocracking results demonstrate that the FeZn/SiO2-S catalyst achieves the lowest coke and gas yields (11.9 wt% and 0.4 wt%), respectively, and the highest VR conversion among these catalysts. The superior performance of the FeZn/SiO2-S catalyst in VR slurry-phase hydrocracking is ascribed to its enhanced hydrogenation activity, deriving from the higher dispersion and sulfurization of metals species. This suppresses the aggregation of polycyclic aromatic hydrocarbons in VR and the over-cracking of intermediate products. Additionally, the increased mesopore associated with smaller SiO2 particles facilitates to the diffusion of large VR molecules, further promoting the hydrocracking reaction.
Keyword ：
FeZn catalyst FeZn catalyst Hydrogenation activity Hydrogenation activity SiO2 particle size SiO2 particle size Slurry-phase hydrocracking Slurry-phase hydrocracking Vacuum residue Vacuum residue
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| GB/T 7714 | Wang, Jianbo , Yan, Jianteng , Cui, Qingyan et al. Effect of SiO2 support particle sizes on the performance of FeZn catalysts in VR slurry-phase hydrocracking [J]. | CATALYSIS TODAY , 2025 , 449 . |
| MLA | Wang, Jianbo et al. "Effect of SiO2 support particle sizes on the performance of FeZn catalysts in VR slurry-phase hydrocracking" . | CATALYSIS TODAY 449 (2025) . |
| APA | Wang, Jianbo , Yan, Jianteng , Cui, Qingyan , Li, Tiesen , Shi, Jie , Wang, Tinghai et al. Effect of SiO2 support particle sizes on the performance of FeZn catalysts in VR slurry-phase hydrocracking . | CATALYSIS TODAY , 2025 , 449 . |
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Abstract ：
Natural rectorite modified by the hydrothermal method was employed to prepare a catalyst for the slurry-phase hydrocracking of vacuum residue (VR). The influence of hydrothermal treatment on the properties of rectorite and the performance of the corresponding catalyst was examined. Hydrothermal treatment of the rectorite led to the formation of Fe3O4, as evidenced by H-2-TPR analysis. XPS results indicate that the hydrothermal treatment of rectorite can intensify the sulfidation process of Mo species supported on it, possibly due to modifications in the surface properties of the rectorite. Comparative slurry-phase hydrocracking tests showed that the catalyst supported on hydrothermally treated rectorite exhibited significantly higher VR conversion, higher liquid product yield, and higher yields of gasoline and diesel fractions, but lower gas yield compared to the catalyst supported on untreated rectorite. This is ascribed to the high hydrogenation activity of the catalyst supported on hydrothermally treated rectorite, which effectively suppresses the over-cracking reactions of intermediate products that would otherwise produce gas, illustrating the process intensification achieved through hydrothermal treatment.
Keyword ：
Hydrocracking Hydrocracking Hydrothermal treatment Hydrothermal treatment Mo catalyst Mo catalyst Sulfidation Sulfidation Vacuum residue Vacuum residue
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| GB/T 7714 | Cui, Qingyan , Yan, Jianteng , Zhang, Haobin et al. Hydrothermal treatment of natural rectorite enhanced Mo sulfidation for slurry-phase hydrocracking of vacuum residue [J]. | CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION , 2024 , 205 . |
| MLA | Cui, Qingyan et al. "Hydrothermal treatment of natural rectorite enhanced Mo sulfidation for slurry-phase hydrocracking of vacuum residue" . | CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION 205 (2024) . |
| APA | Cui, Qingyan , Yan, Jianteng , Zhang, Haobin , Feng, Weiwei , Yue, Yuanyuan , Li, Tiesen et al. Hydrothermal treatment of natural rectorite enhanced Mo sulfidation for slurry-phase hydrocracking of vacuum residue . | CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION , 2024 , 205 . |
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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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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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Controllable synthesis of hierarchical zeolites from natural aluminosilicate minerals is considered an efficient and eco-friendly approach for the production of high-performance zeolites, but its synthesis mechanism is still obscure. Herein, we take the synthesis of a single-crystalline hierarchical NaA zeolite using submolten salt depolymerized kaolin (SMS-K) as the sole source of silicon and aluminum via a mesoscale reorganization strategy as an example to elucidate the reorganization process. Comprehensive morphological and structural analyses reveal that sodium-rich voids in SMS-K facilitate concurrent assembly both within the interior and at the interface of the amorphous gel, leading to the formation of numerous nanoparticles with short-range order which assemble into single-crystal nanocube NaA zeolites with intracrystalline mesopores. By harnessing confinement effects, SMS-K modulates the growth of nanoparticle sizes and enhances the intimate interconnection of nanocubes, thereby yielding NaA zeolite aggregates that exhibit hierarchical porosity, encompassing micro-, meso-, and macropores. This study offers the potential for designing and precisely controlling the fabrication of hierarchical zeolites derived from natural minerals.
Keyword ：
depolymerized kaolin depolymerized kaolin hierarchical NaA zeolite hierarchical NaA zeolite mesoscale reorganization mechanism mesoscale reorganization mechanism role of sodium and hydroxide ions role of sodium and hydroxide ions single-crystalline single-crystalline
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| GB/T 7714 | Chen, Xiaoling , Li, Tiesen , Cui, Qingyan et al. Mesoscale Reorganization of the Depolymerized Aluminosilicate into Single-Crystalline Hierarchical Zeolite [J]. | ACS APPLIED MATERIALS & INTERFACES , 2024 , 16 (44) : 61371-61380 . |
| MLA | Chen, Xiaoling et al. "Mesoscale Reorganization of the Depolymerized Aluminosilicate into Single-Crystalline Hierarchical Zeolite" . | ACS APPLIED MATERIALS & INTERFACES 16 . 44 (2024) : 61371-61380 . |
| APA | Chen, Xiaoling , Li, Tiesen , Cui, Qingyan , Shi, Jie , Tan, Yisheng , Bao, Xiaojun et al. Mesoscale Reorganization of the Depolymerized Aluminosilicate into Single-Crystalline Hierarchical Zeolite . | ACS APPLIED MATERIALS & INTERFACES , 2024 , 16 (44) , 61371-61380 . |
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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 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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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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