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学者姓名：王鹏照
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Abstract ：
轻质烷烃催化热裂解是生产乙烯和丙烯的重要途径。本工作采用水热合成法制备不同Al含量的MFI型分子筛，并采用水热合成法和机械球磨法分别制备了Ba掺杂的高硅ZSM-5分子筛催化剂，研究了其催化正丁烷热裂解反应性能。结果表明：高硅ZSM-5分子筛中Al含量的减少降低了催化剂表面酸性位的数量和强度，抑制了低碳烯烃通过氢转移反应生成烷烃副产物的活性，提高了低碳烯烃的收率。与低硅铝比的ZSM-5分子筛相比，高硅的ZSM-5分子筛表现出更高的低碳烯烃收率。向高硅ZSM-5分子筛中掺杂质量分数为1%的Ba可进一步弱化催化剂表面酸性，抑制氢转移反应，提高低碳烯烃收率。采用机械球磨法制备的Ba/ZSM-5催化剂上乙烯和丙烯的单程收率最高可达54.02%。
Keyword ：
MFI型分子筛 MFI型分子筛 丁烷 丁烷 低碳烯烃 低碳烯烃 催化热裂解 催化热裂解
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| GB/T 7714 | 王革 , 张永泽 , 曾土城 et al. MFI型分子筛在正丁烷催化热裂解制备低碳烯烃反应中的性能研究 [J]. | 化学反应工程与工艺 , 2024 , 40 (04) : 298-305 . |
| MLA | 王革 et al. "MFI型分子筛在正丁烷催化热裂解制备低碳烯烃反应中的性能研究" . | 化学反应工程与工艺 40 . 04 (2024) : 298-305 . |
| APA | 王革 , 张永泽 , 曾土城 , 刘云博 , 王鹏照 . MFI型分子筛在正丁烷催化热裂解制备低碳烯烃反应中的性能研究 . | 化学反应工程与工艺 , 2024 , 40 (04) , 298-305 . |
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We report a facile yet effective strategy to prepare hierarchical Beta zeolite with high molecular transport effectivity in catalysis. Alkaline etching involves preferential desilication from Beta framework and collapse of microporosity. The preferential desilication from outer rim of Beta stacking faults enlarged intercrystallite mesopores, while the collapse of microporosity created cylindroid-like intracrystalline mesopore. Part of Altet with lower stability was removed during alkaline etching, leading to a decrease in acid sites density. Alkaline etching of Beta zeolite with 0.2 mol/L NaOH solution greatly improved n -hexane isomerization activity over Ptbased catalysts. The maximum yield of isohexane and dibranched isomers increased by 6.2 % and 38.6 %, respectively. The enlargement of intercrystallite mesopores and the generation of intracrystalline mesopores of Beta zeolite lowered apparent activation energy of reaction. The apparent diffusivities measurements further revealed that Pt/Beta-0.2 M showed much lower transport limitation than Pt/Beta-parent. Our findings provide a promising catalyst for industrial alkane isomerization.
Keyword ：
Alkaline etching Alkaline etching Alkane isomerization Alkane isomerization Dibranched isomers Dibranched isomers Diffusion barrier Diffusion barrier Mesoporous Beta zeolite Mesoporous Beta zeolite
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| GB/T 7714 | Wang, Pengzhao , Chen, Tingting , Qiu, Zihui et al. Pt-promoted mesoporous Beta zeolite catalysts for n-Hexane isomerization with enhanced selectivity to dibranched isomers [J]. | FUEL , 2024 , 368 . |
| MLA | Wang, Pengzhao et al. "Pt-promoted mesoporous Beta zeolite catalysts for n-Hexane isomerization with enhanced selectivity to dibranched isomers" . | FUEL 368 (2024) . |
| APA | Wang, Pengzhao , Chen, Tingting , Qiu, Zihui , Yao, Wenjun , Liu, Pengpeng , Zhang, Yongze et al. Pt-promoted mesoporous Beta zeolite catalysts for n-Hexane isomerization with enhanced selectivity to dibranched isomers . | FUEL , 2024 , 368 . |
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The chemical enhancement of semiconductor-based surface-enhanced Raman scattering (SERS) substrates is an exciting hot topic. Herein, a simple hydrothermal method is developed to prepare molybdenum disulfide (MoS2), which can be easily exfoliated into monolayer nanosheets (MoS(2)NSs) by sonication, even in the absence of any surfactant. The obtained MoS(2)NSs contain two types of defects, namely, one caused by the incorporation of Mo atoms of high valence states and one caused by the incorporation of S-2(2-). The density of the two types of defects can be easily tuned by controlling the ratio of Na2S and Na2MoO4 in the raw materials. The unique properties and the clear surface make the obtained MoS(2)NSs ideal models to investigate the effect of defects on the SERS activity of MoS2. It is found that the SERS activity of the obtained MoS(2)NSs increases dramatically with the defects caused by Mo atoms of high valence states, while it first increases and then decreases with the increase of defects caused by S-2(2-). On the basis, MoS(2)NSs with high SERS activity and a low detection limit of 5.0 x 10(-9) mol/L toward crystal violet (CV) are obtained. Moreover, the mechanism of defects affecting the SERS activity of MoS(2)NSs is revealed. The defects on one hand provide a large amount of dangling bonds that can combine CV molecules to form MoS2NS-CV complex and on the other hand provide extensive induced local dipoles and enhance the overall SERS spectrum of CV.
Keyword ：
chemical enhancement chemical enhancement crystal violet crystal violet defects defects molybdenum disulfidenanosheets molybdenum disulfidenanosheets surface-enhanced Raman scattering surface-enhanced Raman scattering
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| GB/T 7714 | Fu, Xiaolong , Wu, Huiying , Liu, Zhihong et al. MoS2 Nanosheets as Substrates for SERS-Based Sensing [J]. | ACS APPLIED NANO MATERIALS , 2024 , 7 (4) : 3988-3996 . |
| MLA | Fu, Xiaolong et al. "MoS2 Nanosheets as Substrates for SERS-Based Sensing" . | ACS APPLIED NANO MATERIALS 7 . 4 (2024) : 3988-3996 . |
| APA | Fu, Xiaolong , Wu, Huiying , Liu, Zhihong , Wang, Pengzhao , Rong, Jiefeng , Fu, Fengfu et al. MoS2 Nanosheets as Substrates for SERS-Based Sensing . | ACS APPLIED NANO MATERIALS , 2024 , 7 (4) , 3988-3996 . |
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Understanding the effect of acid strength on butene isomerization mechanisms is essential in C4 alkylation process. Herein, the double bond, trans-cis, and skeleton isomerization mechanisms of butene over acid sites with different acid strengths were investigated utilizing density functional theory (DFT) calculations. It is demon-strated that the acid strength significantly affects the isomerization mechanisms of butene. The stability of carbonium ions as reaction intermediates follows the order: tert-butyl cation > cis-butyl cation > trans-butyl cation, which is more sensitive to acid strength than that of butoxide species. Therefore, the reaction pathways of double bond and trans-cis isomerizations changed with varying the acid strength. Based on the analysis of activation energy barriers, it is found that 1-butene and 2-butene can be easily converted into each other over strong acid site. Thus, for reactants, C4 alkylation has no selectivity to 1-butene and 2-butene over strong acid site, which is consistent with experimental study. This work provides mechanistic insights into the relationship among acid strength, type of butene, and quality of alkylate in the C4 alkylation process.
Keyword ：
Acid strength Acid strength Alkylation Alkylation Butene Butene Density Functional Theory Density Functional Theory Isomerization mechanism Isomerization mechanism
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| GB/T 7714 | Zhang, Xiaoqiang , Li, Hao , Du, Yupeng et al. Elucidating effect of acid strength on isomerization mechanisms of butene over solid acid catalysts in C4 alkylation [J]. | FUEL , 2023 , 339 . |
| MLA | Zhang, Xiaoqiang et al. "Elucidating effect of acid strength on isomerization mechanisms of butene over solid acid catalysts in C4 alkylation" . | FUEL 339 (2023) . |
| APA | Zhang, Xiaoqiang , Li, Hao , Du, Yupeng , Chen, Xiaoping , Wang, Pengzhao , Wang, Lei et al. Elucidating effect of acid strength on isomerization mechanisms of butene over solid acid catalysts in C4 alkylation . | FUEL , 2023 , 339 . |
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The isobutane/butene (I/O) ratio in the pore is a crucial factor for enhancing the catalytic stability of zeolitic catalysts in C4 alkylation process. In this work, the influence mechanism of the Si/Al ratio on the I/O ratio in the pore for H-BEA zeolite was investigated via CB-GCMC methods under realistic alkylation conditions. It is found that the I/O ratio in the pore decreases dramatically with decreasing the Si/Al ratio due to the higher adsorption heats of 1-butene over the acid sites than that of isobutane. Therefore, there will be an optimal Si/Al ratio for C4 alkylation, which is in good agreement with the experimental results. Furthermore, the relationship between the I/O ratio in the pore and feedstock over the H-BEA zeolite with different Si/Al ratios was built. We found that increasing the I/O ratio in the pore by improving the I/O ratio in the feedstock is limited, when the Si/Al ratio is much low. The external surface modification of catalyst will be an effective method to improve the I/O ratio in the pore. These results are of great significance to the rational design of high-efficiency C4 alkylation catalysts.
Keyword ：
Adsorption Adsorption Alkylation Alkylation Al ratio Al ratio I I O ratio O ratio Si Si Zeolite Zeolite
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| GB/T 7714 | Li, Shuo , Zhang, Xiaoqiang , Dong, Shijia et al. Insights into the effect of Si/Al ratio on Isobutane/1-butene ratio in the pore of H-BEA zeolite in C4 alkylation process [J]. | FUEL , 2023 , 348 . |
| MLA | Li, Shuo et al. "Insights into the effect of Si/Al ratio on Isobutane/1-butene ratio in the pore of H-BEA zeolite in C4 alkylation process" . | FUEL 348 (2023) . |
| APA | Li, Shuo , Zhang, Xiaoqiang , Dong, Shijia , Du, Yupeng , Chen, Xiaoping , Wang, Pengzhao et al. Insights into the effect of Si/Al ratio on Isobutane/1-butene ratio in the pore of H-BEA zeolite in C4 alkylation process . | FUEL , 2023 , 348 . |
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Aiming at improving reaction selectivity of zeolite Beta-catalyzed isomerization of normal alkane, we reported a facile but efficient route to prepare the Beta@SBA-15 composite supports with low surface diffusion barriers in isomers formation from normal alkane. Microporous Beta zeolite and mesoporous SBA-15 zeolite were physically mixed and milled by high-energy planetary ball-mill. The addition of SBA-15 and milling, which have little effect on the acid properties of Beta zeolites, disaggregate the Beta particles and anchor the Beta nanocrystals on the surface of SBA-15 mesostructure. The apparent diffusivities of 2-methyl pentane measured by zero-length column method increased by 50%. n-Hexane isomerization tests show that the Pt/Beta@SBA-15 catalysts exhibit much higher selectivity to isomers, especially the dibranched isomers and lower selectivity to cracking reaction, owning to the reduced transport limitation of composite supports.
Keyword ：
Alkane isomerization Alkane isomerization Ball milling Ball milling Beta zeolite Beta zeolite Diffusion barriers Diffusion barriers SBA-15 addition SBA-15 addition
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| GB/T 7714 | Liu, Pengpeng , Qiu, Zihui , Shi, Huibing et al. Reducing the diffusion barriers of Pt/Beta catalyzed n-hexane isomerization by SBA-15 addition and high-energy milling [J]. | MICROPOROUS AND MESOPOROUS MATERIALS , 2023 , 356 . |
| MLA | Liu, Pengpeng et al. "Reducing the diffusion barriers of Pt/Beta catalyzed n-hexane isomerization by SBA-15 addition and high-energy milling" . | MICROPOROUS AND MESOPOROUS MATERIALS 356 (2023) . |
| APA | Liu, Pengpeng , Qiu, Zihui , Shi, Huibing , Song, Yu , Zhao, Deming , Wang, Pengzhao et al. Reducing the diffusion barriers of Pt/Beta catalyzed n-hexane isomerization by SBA-15 addition and high-energy milling . | MICROPOROUS AND MESOPOROUS MATERIALS , 2023 , 356 . |
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采用共沉淀-浸渍法制备了系列硫酸负载催化剂Pt/SO42--(ZrO2-Al2O3),利用X射线衍射仪、物理吸附仪、红外光谱仪等对其进行了表征,并在固定床微型反应装置上对其催化异丁烷正构化反应性能进行了评价.结果表明:硫酸单层分散于载体表面,硫酸负载不利于四方晶相ZrO2长大;随着硫酸负载量的增加,催化剂介孔结构的有序性增强且孔径减小,孔径最小降为3.41 nm,孔容可提高至0.091 cm3/g,比表面积增至100m2/g以上;在反应温度为250℃的条件下,硫酸负载量为15％时,异丁烷转化率高达41.74％;硫酸负载量为2％时,正丁烷选择性最高为93.91％.
Keyword ：
Pt/SO42--(ZrO2-Al2O3) Pt/SO42--(ZrO2-Al2O3) 催化剂 催化剂 单层分散 单层分散 异丁烷 异丁烷 正构化 正构化 硫酸 硫酸 酸性位 酸性位
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| GB/T 7714 | 宋宇 , 辛靖 , 张海洪 et al. 硫酸负载对Pt/SO42-(ZrO2-Al2O3)催化剂性能的影响 [J]. | 石化技术与应用 , 2023 , 41 (4) : 251-255 . |
| MLA | 宋宇 et al. "硫酸负载对Pt/SO42-(ZrO2-Al2O3)催化剂性能的影响" . | 石化技术与应用 41 . 4 (2023) : 251-255 . |
| APA | 宋宇 , 辛靖 , 张海洪 , 曾土城 , 范文轩 , 王廷海 et al. 硫酸负载对Pt/SO42-(ZrO2-Al2O3)催化剂性能的影响 . | 石化技术与应用 , 2023 , 41 (4) , 251-255 . |
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采用“共沉淀-浸渍”法制备了一系列不同铝质量分数的Pt/SO■-(ZrO_2-Al_2O_3)催化剂，并考察了其催化异丁烷正构化反应性能。结果表明，适量铝的加入抑制了热力学上处于亚稳态的四方相ZrO_2向单斜相的转变，提高了催化剂表面的固硫能力，促进了催化剂表面超强酸性位的形成。铝掺杂质量分数为3%的催化剂具有最佳的催化异丁烷正构化反应性能，在250℃时异丁烷转化率和正丁烷选择性分别达45.47%和79.67%。
Keyword ：
异丁烷正构化 异丁烷正构化 超强酸性位 超强酸性位 铝掺杂 铝掺杂 锆基催化剂 锆基催化剂
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| GB/T 7714 | 张海洪 , 辛靖 , 宋宇 et al. Al掺杂对Pt/SO~(2-)_4-(ZrO_2-Al_2O_3)催化异丁烷正构化反应性能的影响研究 [J]. | 现代化工 , 2023 , 43 (10) : 148-153 . |
| MLA | 张海洪 et al. "Al掺杂对Pt/SO~(2-)_4-(ZrO_2-Al_2O_3)催化异丁烷正构化反应性能的影响研究" . | 现代化工 43 . 10 (2023) : 148-153 . |
| APA | 张海洪 , 辛靖 , 宋宇 , 曾土城 , 范文轩 , 王廷海 et al. Al掺杂对Pt/SO~(2-)_4-(ZrO_2-Al_2O_3)催化异丁烷正构化反应性能的影响研究 . | 现代化工 , 2023 , 43 (10) , 148-153 . |
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The understanding of reaction mechanism is the key to develop the highly efficient catalyst. The introduction of Pt on SO42-/ZrO2 surface greatly improves its catalytic stability in n-butane hydroisomerization, but the function of Pt is still in controversy. The introduction of Pt on sulfated zirconia surface only promotes the hydrogenation of coke precursor and slows catalyst deactivation during n-butane hydroisomerization, but has no effect on the initial conversion rate of n-butane and selectivity to isobutane. H2-TPR and H2-TPD investigations reveal that Pt functions via hydrogen spillover mechanism, rather than classical bifunctional "metal-acid" catalysis mechanism. Our findings provide a new perspective for the rational design and synthesis of "metal-acid" bifunctional catalysts for alkane isomerization.
Keyword ：
Bifunctional catalysis Bifunctional catalysis Hydrogen spillover Hydrogen spillover N-butane isomerization N-butane isomerization Pt Pt SO42--ZrO2 SO42--ZrO2
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| GB/T 7714 | Wang, Pengzhao , Zeng, Tucheng , Yao, Wenjun et al. Role of Pt in Pt/SO42--ZrO2 catalyzed n-butane isomerization reaction: Hydrogen spillover rather than bifunctional "metal-acid" catalysis [J]. | MOLECULAR CATALYSIS , 2023 , 547 . |
| MLA | Wang, Pengzhao et al. "Role of Pt in Pt/SO42--ZrO2 catalyzed n-butane isomerization reaction: Hydrogen spillover rather than bifunctional "metal-acid" catalysis" . | MOLECULAR CATALYSIS 547 (2023) . |
| APA | Wang, Pengzhao , Zeng, Tucheng , Yao, Wenjun , Wang, Yaowei , Zhao, Deming , Zhang, Minxiu et al. Role of Pt in Pt/SO42--ZrO2 catalyzed n-butane isomerization reaction: Hydrogen spillover rather than bifunctional "metal-acid" catalysis . | MOLECULAR CATALYSIS , 2023 , 547 . |
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本发明公开了一种利用FCC废催化剂制备SSZ‑13分子筛的方法及其应用，属于分子筛合成领域。该方法包括以下步骤：将FCC废催化剂分散到碱溶液中，然后加入模板剂、补充硅源和铝源，混合物在一定温度下持续搅拌直至水分蒸干形成干凝胶，研磨成粉后，转移到聚四氟乙烯烧杯中，然后将其移入装有一定量水的聚四氟乙烯内衬的高压釜中，使干凝胶不与反应釜中的水直接接触进行蒸汽辅助结晶，最后经洗涤、过滤、高温焙烧得到SSZ‑13分子筛。本发明以FCC废催化剂为原料合成具有高结晶度的SSZ‑13分子筛，充分利用了废催化剂中所含的稀土金属，使所获得的SSZ‑13分子筛中富含稀土金属元素，提高了其在以NH3为还原剂的选择性催化还原(NH3‑SCR)反应中的水热稳定性。
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| GB/T 7714 | 岳源源 , 汪雪琴 , 鲍晓军 et al. 一种利用FCC废催化剂制备SSZ-13分子筛的方法及其应用 : CN202210640182.3[P]. | 2022-06-07 00:00:00 . |
| MLA | 岳源源 et al. "一种利用FCC废催化剂制备SSZ-13分子筛的方法及其应用" : CN202210640182.3. | 2022-06-07 00:00:00 . |
| APA | 岳源源 , 汪雪琴 , 鲍晓军 , 李铁森 , 王婵 , 王廷海 et al. 一种利用FCC废催化剂制备SSZ-13分子筛的方法及其应用 : CN202210640182.3. | 2022-06-07 00:00:00 . |
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