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Core-shell-structured Composite ZSM-5@MCM-41 Catalysts:Fabrication,Characterization,and Enhanced Performance in Hexane Catalytic Cracking

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China Petroleum Processing & Petrochemical Technology 2023年第4期25卷 41-51页

作者： zhu Jiale zhu xuedong Yang Fan State Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science&TechnologyShanghai 200237China

A series of core-shell zeolites with a ZSM-5 zeolite core and a MCM-41 shell with varying shell thicknesses were successfully fabricated via a cetyltrimethylammonium bromide(CTAB)-directed sol-gel coating method in an ultradilute solution. Extensive characterization techniques, including XRD, TEM, N_(2) adsorption-desorption, NH_(3)-TPD, and IR measurements, confirmed the successful coating of a microporous ZSM-5 core with a mesoporous MCM-41 shell layer and were further employed to explore the textural properties and acidic properties of the samples. The hexane cracking results revealed a significant enhancement in olefin yields after introducing the MCM-41 shell to ZSM-5. Interestingly, a volcanic trend in olefin yields was observed with the increase in the shell thickness. In particular, the highest olefin yield of 51.5%, exceeding that of the core catalyst by 17.1%, was achieved when the shell thickness was controlled at 40 nm.Moreover, the catalyst lifetime investigation revealed that the core-shell composite catalyst exhibited a minimal reduction in hexane conversion of merely 3.8% over a 120 h reaction period, significantly outperforming the 11.3% reduction exhibited by the core catalyst. This remarkable catalytic performance was attributed to the passivation of external acid sites and the introduction of more developed pore channels by the shell, which effectively mitigated unwanted side reactions. The successful synthesis of these core-shell structured catalysts presents a novel strategy for improving catalytic performance in hexane cracking, in addition to serving as a solid foundation for the design of industrial catalysts for light naphtha cracking.

关键词： catalytic cracking light olefin core-shell ZSM-5 zeolite

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Converting intercalation-type cathode in spent lithium-ion batteries into conversion-type cathode

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Nano Research 2024年第5期17卷 4602-4609页

作者： Dingding zhu Yong Su Jingzhao Chen Xiangze Ou xuedong Zhang Wen Xie Yuyan Zhou Yunna Guo Qiushi Dai Peng Jia Jitong Yan Lin Geng Baiyu Guo Liqiang Zhang Yongfu Tang Qiao Huang Jianyu Huang School of Materials Science and Engineering Xiangtan UniversityXiangtan 411105China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066000China

The widespread applications of lithium-ion batteries(LIBs)generate tons of spent LIBs.Therefore,recycling LIBs is of paramount importance in protecting the environment and saving the resources.Current commercialized LIBs mostly adopt layered oxides such as LiCoO_(2)(LCO)or LiNi_(x)Co_(y)Mn_(1-x-y)O_(2)(NMC)as the cathode materials.Converting the intercalation-type spent oxides into conversion-type cathodes(such as metal fluorides(MFs))offers a valid recycling strategy and provides substantially improved energy densities for LIBs.Herein,two typical Co-based cathodes,LCO and LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)(NMC622),in spent LIBs were successfully converted to CoF_(2) and(Ni_(x)Co_(y)Mn_(z))F_(2) cathodes by a reduction and fluorination technique.The as converted CoF_(2) and(Ni_(x)Co_(y)Mn_(z))F_(2) delivered cell energy densities of 650 and 700 Wh/kg,respectively.Advanced atomic-level electron microscopy revealed that the used LCO and NMC622 were converted to highly phase pure Co metal and Ni_(0.6)Co_(0.2)Mn_(0.2) alloys in the used graphite-assisted reduction roasting,simultaneously producing the important product of Li_(2)CO_(3) using only environment friendly solvent.Our study provided a versatile strategy to convert the intercalation-type Co-based cathode in the spent LIBs into conversion-type MFs cathodes,which offers a new avenue to recycle the spent LIBs and substantially increase the energy densities of next generation LIBs.

关键词： spent lithium-ion batteries recycling energy densities conversion-type cathode

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Seed-solution-induced Synthesis of FER Zeolite and Its Catalytic Application in the Skeletal Isomerization of n-Butene

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China Petroleum Processing & Petrochemical Technology 2023年第4期25卷 61-73页

作者： Fan Jinlong Yang Fan zhu xuedong Xu Yarong Chen Lantian State Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237 Research Institute of Urumqi Petrochemical Company PetrochinaUrumqi 830019

A series of Ferrierite(FER)zeolites were prepared via hydrothermal synthesis in the absence of organic templates with the aid of sodium-type FER zeolite(NaFER)or NaFER suspensions(NaFERsus)acquired by NaOH solution treatment as seeds.The differences in the structures and acid sites of the obtained FER zeolite catalysts arising from the choice of seed were investigated,and the catalytic performances of the obtained FER zeolites were evaluated in the skeletal isomerization of n-butene.The results indicate that the samples synthesized using NaFERsus feature more Br?nsted acid sites(BAS)in the 10-membered-ring(10-MR)at the expense of strong acid and Lewis acid sites(LAS),compared with samples derived from NaFER.Therefore,the FER samples synthesized using NaFERsus outperformed the NaFER counterparts as the BAS in 10-MR and LAS were the main active sites,while BAS in 8-MR and LAS were responsible for side reactions,such as polymerization,cracking,and carbon deposition in n-butene isomerization.The optimized FER catalyst was continuously used for 720 h at 350℃ at 0.1 MPa under an n-butene space velocity of 2.0 h^(-1),during which the n-butene conversion remained at>40%,and the isobutylene yield was>37.5%.

关键词： FER zeolites alkali treated seed solution n-butene skeletal isomerization

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Impact of inhaled corticosteroid use on elderly chronic pulmonary disease patients with community acquired pneumonia

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Chinese Medical Journal 2024年第2期137卷 241-243页

作者： Xiudi Han Hong Wang Liang Chen Yimin Wang Hui Li Fei Zhou Xiqian Xing Chunxiao Zhang Lijun Suo Jinxiang Wang Guohua Yu Guangqiang Wang Xuexin Yao Hongxia Yu Lei Wang Meng Liu Chunxue Xue Bo Liu Xiaoli zhu Yanli Li Ying Xiao Xiaojing Cui Lijuan Li xuedong Liu Bin Cao Department of Pulmonary and Critical Care Medicine Qingdao Municipal HospitalQingdaoShandong 266011China Department of Nosocomial Infection Qingdao Municipal HospitalQingdaoShandong 266011China Department of Infectious Diseases Nanjing Lishui People’s HospitalNanjingJiangsu 211213China Department of Pulmonary and Critical Care Medicine National Clinical Research Center of Respiratory DiseasesCenter for Respiratory DiseasesChina-Japan Friendship HospitalBeijing 100020China Department of Respiratory Medicine Yan’an Hospital Affiliated to Kunming Medical UniversityKunmingYunnan 652199China Department of Respiratory Medicine Beijing Huimin HospitalBeijing 100054China Department of Pulmonary and Critical Care Medicine Zibo Municipal HospitalZiboShandong 255000China Department of Respiratory Medicine Beijing Luhe HospitalCapital Medical UniversityBeijing 101149China Department of Pulmonary and Critical Care Medicine Weifang No.2 People’s HospitalWeifangShandong 261599China Department of Respiratory Medicine Shandong University Affiliated Qilu Hospital(Qingdao)QingdaoShandong 266035China Department of Respiratory Medicine the 2nd Hospital of Beijing CorpsChinese Armed Police ForcesBeijing 100044China Department of Infectious Disease Qingdao University Medical College Affiliated Yantai Yuhuangding HospitalYantaiShandong 100191China Department of Respiratory Medicine Rizhao Chinese Medical Hospital Affiliated to Shandong Chinese Medical UniversityRizhaoShandong 276800China Department of Respiratory Medicine Beijing Hospital of Traditional Chinese Medicine Affiliated to Capital Medical UniversityBeijing 100010China Department of Occupational Medicine and Toxicology Beijing Chao-Yang HospitalCapital Medical UniversityBeijing 100020China

To the Editor:With an aging global population,the incidences of community-acquired pneumonia(CAP)and chronic obstructive pulmonary disease(COPD)have signicantly increased.[1]Previous studies have conrmed that COPD and asthma are independently associated with the prevalence of CAP.The use of inhaled corticosteroid(ICS),the cornerstone of treatment for asthma,COPD with frequent acute exacerbations,and asthma-COPD overlap(ACO)may induce changes in the local lung microbiome and abnormal lung immunity,ultimately,causing a signicantly increased risk of pneumonia.However,in cases of pneumonia,the effect of the use of ICS on CAP mortality remains controversial.While data from one study favored the prior use of ICS,which was associated with a signicantly lower short-term mortality rate,[2]other studies have identied no impact on mortality.To date,data on the impact of the use of ICS on mortality,prehospitalization or during hospitalization,are scarce,particularly in the older population.Therefore,this multicenter,retrospective study explored the association between the use of ICS during hospitalization and short-term mortality in older patients with CAP and those with chronic pulmonary disease(CPD).

关键词： pneumonia patients immunity

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Pd FER分子筛模板剂脱除及其催化正丁烯骨架异构化反应性能

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石油炼制与化工 2024年第3期55卷 9-20页

作者：樊金龙朱学栋徐亚荣杨帆华东理工大学化工学院上海200237 中国石油乌鲁木齐石化公司研究院

制备HFER-CHA分子筛并进行了钯改性,在不同温度的流动空气气氛下焙烧脱除模板剂,考察钯改性对分子筛模板剂脱除的影响,研究脱除模板剂后的分子筛催化醚后碳四中正丁烯骨架异构化的反应性能。采用X射线荧光光谱(XRF)、X射线衍射(XRD)和... 详细信息

制备HFER-CHA分子筛并进行了钯改性,在不同温度的流动空气气氛下焙烧脱除模板剂,考察钯改性对分子筛模板剂脱除的影响,研究脱除模板剂后的分子筛催化醚后碳四中正丁烯骨架异构化的反应性能。采用X射线荧光光谱(XRF)、X射线衍射(XRD)和氨程序升温脱附(NH 3-TPD)等手段对催化剂进行了表征。结果表明:焙烧温度影响分子筛模板剂的脱除效果和分子筛物理化学性质,钯改性显著降低了HFER分子筛中模板剂的脱除温度,Pd HFER-CHA分子筛在空气气氛中经350℃焙烧4 h即可将模板剂完全脱除;模板剂的脱除增加了分子筛的比表面积和孔体积;随着焙烧温度的提高,分子筛酸量增加,催化剂活性增强,分子筛中L酸的增多是导致醚后碳四中正丁烯发生聚合、裂解等副反应的主要原因;Pd HFER-350分子筛在350℃、0.1 MPa、正丁烯质量空速2.0 h^(-1)的条件下连续运行720 h,正丁烯平均转化率大于40%,异丁烯选择性大于90%。

关键词： FER分子筛钯模板剂脱除正丁烯骨架异构化

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论建筑工程施工中的防水防渗施工技术的应用分析

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工程建设（维泽科技） 2024年第1期7卷 42-44页

作者：朱学东枣庄市房屋建设开发中心山东枣庄277100

随着人们对建筑质量和居住环境的不断追求,防水防渗工程在建筑领域的地位日益凸显,在实际工程中,由于材料选择、施工工艺等多因素的影响,防水防渗问题时有发生,给建筑结构带来了潜在威胁,深入研究防水防渗技术的应用原理和有效的质量控... 详细信息

随着人们对建筑质量和居住环境的不断追求,防水防渗工程在建筑领域的地位日益凸显,在实际工程中,由于材料选择、施工工艺等多因素的影响,防水防渗问题时有发生,给建筑结构带来了潜在威胁,深入研究防水防渗技术的应用原理和有效的质量控制手段,对于提高建筑工程的质量水平,降低后期维护成本,具有重要的实践意义。

关键词：建筑施工防水防渗施工技术防水材料

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Nanoscale cathodoluminescence spectroscopy probing the nitride quantum wells in an electron microscope

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Chinese Physics B 2024年第3期33卷 144-149页

作者：刘哲彤刘秉尧梁冬冬李晓梅李晓敏陈莉朱瑞徐军魏同波白雪冬高鹏 Electron Microscopy Laboratory School of PhysicsPeking UniversityBeijing 100871China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China Research and Development Center for Semiconductor Lighting Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China International Center for Quantum Materials Peking UniversityBeijing 100871China

To gain further understanding of the luminescence properties of multiquantum wells and the factors affecting them on a microscopic level,cathodoluminescence combined with scanning transmission electron microscopy and spectroscopy was used to measure the luminescence of In_(0.15)Ga_(0.85)N five-period multiquantum wells.The lattice-composition-energy relationship was established with the help of energy-dispersive x-ray spectroscopy,and the bandgaps of In_(0.15)Ga_(0.85)N and GaN in multiple quantum wells were extracted by electron energy loss spectroscopy to understand the features of cathodoluminescence spectra.The luminescence differences between different periods of multiquantum wells and the effects of defects such as composition fluctuation and dislocations on the luminescence of multiple quantum wells were revealed.Our study establishing the direct relationship between the atomic structure of In_(x)Ga_(1-x)N multiquantum wells and photoelectric properties provides useful information for nitride applications.

关键词： nitride multiquantum wells defect cathodoluminescence scanning transmission electron microscopy

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Effect of Acidity on Methylation of Benzene with Methanol Catalyzed by HZSM-5:A DFT Study

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China Petroleum Processing & Petrochemical Technology 2021年第2期23卷 21-27页

作者： Wei Pifeng Fu Guangbin Mu Shanliang Gao Jichao Wen Zhenhao zhu xuedong School of Chemistry&Chemical Engineering Linyi UniversityLinyi 276000 SINOPEC Qingdao Refining and Chemical Company Ltd.Qingdao 266500 School of Chemical Engineering East China University of Science and TechnologyShanghai 200237

Different acidic HZSM-5 zeolites were constructed by doping with Al,Ga,or In.The effect of acidity on the adsorption of methylbenzenes and the reaction energy barriers for the methylation of benzene with methanol catalyzed by HZSM-5 zeolite were investigated by using the density functional theory.The results show that acidity exhibits less effect in the adsorption of methylbenzenes,while linear relationships are observed between the acidity and reaction energy barriers.As the acidity increases,the reaction energy barrier decreases linearly,and the stepwise pathway becomes dominant in strong acidity environment,while weak acidity is conducive to the concerted pathway.The calculation results could contribute to understanding the relationship between the acidity and the zeolite-catalyzed alkylation reaction of methylbenzenes.

关键词： benzene methanol methylation acidity HZSM-5

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经阴道超声联合生理盐水灌注直肠子宫陷凹对腹膜型子宫内膜异位症的诊断价值

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中华医学超声杂志（电子版） 2024年第1期21卷 32-36页

作者：朱成美赵巧梅邓学东南京医科大学附属苏州医院超声中心江苏苏州215002 淮安市妇幼保健院超声科江苏淮安223000

目的探讨经阴道超声联合生理盐水灌注直肠子宫陷凹(SPG)对腹膜型子宫内膜异位症的诊断价值。方法选取2022年3月至9月淮安市妇幼保健院收治的50例具有痛经、慢性盆腔痛、性交痛、不孕症状,需要进行腹腔镜手术检查或治疗的患者为研究对象... 详细信息

目的探讨经阴道超声联合生理盐水灌注直肠子宫陷凹(SPG)对腹膜型子宫内膜异位症的诊断价值。方法选取2022年3月至9月淮安市妇幼保健院收治的50例具有痛经、慢性盆腔痛、性交痛、不孕症状,需要进行腹腔镜手术检查或治疗的患者为研究对象,患者均接受经阴道常规超声及SPG检查,且经腹腔镜及病理组织学最终确诊。统计分析经阴道常规超声及SPG检查在诊断腹膜型子宫内膜异位症的敏感度、特异度、准确性、阳性预测值及阴性预测值,并采用χ^(2)检验比较2种检查方法的差异。结果50例患者,经腹腔镜手术病理检查确诊38例为腹膜型子宫内膜异位症,12例为非腹膜型子宫内膜异位症患者;经阴道常规超声诊断为腹膜型子宫内膜异位症者22例,非腹膜型子宫内膜异位症患者28例;SPG检查诊断为腹膜型子宫内膜异位症者40例,非腹膜型子宫内膜异位症10例。经阴道常规超声检查结果准确性为40.00%(20/50),敏感度为39.47%(15/38)、特异度为41.67%(5/12)、阳性预测值为68.18%(15/22)、阴性预测值为17.86%(5/28),SPG检查结果的准确性为84.00%(42/50)、敏感度为92.11%(35/38)、特异度为58.33%(7/12)、阳性预测值为87.50%(35/40)、阴性预测值为70.00%(7/10),均高于经阴道常规超声检查,差异具有统计学意义(χ^(2)=6.518、27.109、0.114、0.860、1.656,P=0.013、0.006、0.042、0.035、0.029)。结论SPG是诊断腹膜型子宫内膜异位症安全、高效的方法,为早期子宫内膜异位症诊断提供了新方法。

关键词：超声检查经阴道生理盐水灌注直肠子宫陷凹早期诊断子宫内膜异位症

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Study on Catalytic Alkylation of Benzene with Methanol over ZSM-22 and ZSM-35

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China Petroleum Processing & Petrochemical Technology 2017年第4期19卷 38-46页

作者： Li Yunsheng Wen Zhenhao Wei Zhenhao Yang Fan zhu xuedong Engineering Research Center of Large Scale Reactor Engineering and Technology East China University of Science and Technology Shanghai 200237 State Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai 200237

The ZSM-22 and ZSM-35 zeolites were synthesized via the hydrothermal crystallization method. The samples were characterized by XRD, SEM, N_2 adsorption-desorption, NH_3-TPD, TPO, TG, and Raman spectrometry, and the results showed that ZSM-22 and ZSM-35 possessed similar microporous volume and acidity. In the alkylation of benzene with methanol, ZSM-22 and ZSM-35 showed different coke location, coking rate and graphitizing degree. Compared with the industrial ZSM-5, ZSM-22 and ZSM-35 both showed higher selectivity of toluene and xylene(93.63% and 96.50%,respectively) during the alkylation of benzene with methanol, and the selectivity of para-xylene in xylene isomers was51.96% and 41.45%, respectively. Meanwhile, the selectivity of ethylbenzene and C_9^+ aromatics was also lower than that of industrial ZSM-5.

关键词： ZSM-22 ZSM-35 benzene methanol alkylation

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