检索结果-南通市图书馆

Synthesis of NaY zeolite from a submolten depolymerized perlite:Alkalinity effect and crystallization kinetics

Chinese Journal of Chemical Engineering 2024年第6期70卷 130-138页

作者： Yanli Qu Peng Dong Li Yang yuanyuan yue Haoliang Wang Jingcai Cheng Chao Yang CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Petroleum Molecular&Process EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100190China Qingyuan Innovation Laboratory Quanzhou 362801China National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou UniversityFuzhou 350108China

NaY zeolites are synthesized using submolten salt depolymerized natural perlite mineral as the main silica and alumina sources in a 0.94 L stirred *** of alkalinity ranging from 0.38 to 0.55(n(Na_(2)O)/n(SiO_(2)))on the relative crystallinity,textural properties and crystallization kinetics were *** results show that alkalinity exerts a nonmonotonic influence on the relative crystallinity and textural properties,which exhibit a maximum at the alkalinity of *** nucleation kinetics are studied by fitting the experimental data of relative crystallinity with the Gualtieri *** is shown that the nucleation rate constant increases with increasing alkalinity,while the duration period of nucleation decreases with increasing *** n(Na_(2)O)/n(SiO_(2))ratios ranging from 0.38 to 0.55,the as-synthesized NaY zeolites exhibit narrower crystal size distributions with the increase in *** growth rates determined from the variations of average crystal size with time are 51.09,157.50,46.17 and 24.75 nm·h^(-1),*** is found that the larger average crystal sizes at the alkalinity of 0.38 and 0.43 are attributed to the dominant role of crystal growth over ***,the combined action of prominent crystal growth and the longer duration periods of nucleation at the alkalinity of 0.38 and 0.43 results in broader crystal size *** findings demonstrate that control of the properties of NaY zeolite and the crystallization kinetics can be achieved by conducting the crystallization process in an appropriate range of alkalinity of the reaction mixture.

关键词： NaY zeolite Submolten salt depolymerized perlite Alkalinity Crystallization kinetics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

OSDA-free synthesis of FeZSM-22 zeolite from natural minerals for n-octane hydroisomerization

引用

Chinese Journal of Chemical Engineering 2024年第2期66卷 51-59页

作者： Tiesen Li Ting Chen Yinghui Ye Peng Dong TinghaiWang Qingyan Cui Chan Wang yuanyuan yue National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou UniversityFuzhou 350002China Qingyuan Innovation Laboratory Quanzhou 362801China

A seed-directed approach to synthesizing Fe ZSM-22 zeolite without organic structure directing agent(OSDA)was developed by using Fe-rich diatomite as all aluminum and iron *** Fe ZSM-22zeolite with optimal crystallinity and purity can be obtained by systematically adjusting feed composition and synthesis *** show that Fe ZSM-22 zeolite synthesized with OSDA-free owns high crystallinity,obvious thin needle-shaped morphology and high Bronsted/Lewis acid ***,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,*** work provides an alternative route to sustainably synthesizing heteroatomic zeolites with high performance.

关键词： FeZSM-22 zeolite OSDA-free synthesis Natural minerals n-octane hydroisomerization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Facile synthesis of hierarchical NaX zeolite from natural kaolinite for efficient Knoevenagel condensation

引用

Chinese Journal of Chemical Engineering 2024年第1期65卷 75-84页

作者： Wen Xiao Peng Dong Chan Wang Jingdong Xu Tiesen Li Haibo Zhu Tinghai Wang Renwei Xu yuanyuan yue National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical EngineeringFuzhou UniversityFuzhou 350108China Qingyuan Innovation Laboratory Quanzhou 362801China Sinochem Quanzhou Energy Technology Co. Ltd.Quanzhou 362000China

Zeolite catalysts have found extensive applications in the synthesis of various fine ***,the micropores of zeolites impose diffusion limitations on bulky molecules,greatly reducing the catalytic ***,we explore an economic and environmentally friendly method for synthesizing hierarchical NaX zeolite that exhibits improved catalytic performance in the Knoevenagel condensation reaction for producing the useful fine chemical *** synthesis was achieved via a low-temperature activation of kaolinite and subsequent in-situ transformation strategy without any template or *** characterizations reveal that the synthesized NaX zeolite has both intercrystalline and intra-crystalline mesopores,smaller crystal size,and larger external specific surface area compared to commercial NaX *** mechanism investigations show that the inter-crystalline mesopores are generated by stacking smaller crystals formed from in-situ crystallization of the depolymerized kaolinite,and the intra-crystalline mesopores are inherited from the pores in the depolymerized *** synthesis strategy provides an energy-saving and effective way to construct hierarchical zeolites,which may gain wide applications in fine chemical manufacturing.

关键词： Hierarchical NaX zeolite Template-free synthesis Natural kaolinite Knoevenagel condensation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

分子筛合成母液回用技术研究进展

引用

石油炼制与化工 2024年第2期55卷 110-114页

作者：吴岩董鹏王颖岳源源福州大学石油化工学院福州350108 清源创新实验室

分子筛合成母液回用技术是分子筛制备的一种新方法,能够有效提高原料利用率和减少废液排放。介绍了分子筛合成母液的产生及组成,简述了分子筛合成母液回用技术及其在分子筛合成中的应用情况,重点总结该技术在工业上最具代表性的Y,ZSM-5,... 详细信息

分子筛合成母液回用技术是分子筛制备的一种新方法,能够有效提高原料利用率和减少废液排放。介绍了分子筛合成母液的产生及组成,简述了分子筛合成母液回用技术及其在分子筛合成中的应用情况,重点总结该技术在工业上最具代表性的Y,ZSM-5,SAPO-34分子筛合成中的研究进展,并阐述当前分子筛母液回用技术面临的挑战,展望其在工业生产中的发展前景,为实现分子筛产业高效与可持续发展提供借鉴。

关键词：分子筛合成母液回用技术可持续制备

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

银杏硫酸盐木质素组分分离及其抗肿瘤构效研究

引用

林产化学与工业 2024年第1期44卷 17-23页

作者：谢益民岳园园赵云博魏鑫湖北工业大学制浆造纸研究院湖北武汉430068 湖北工业大学绿色轻工材料湖北省重点实验室湖北武汉430068

为了从硫酸盐木质素中提取具有抗肿瘤活性的成分,以不同极性的溶剂对银杏硫酸盐木质素(KL)进行分级,利用MTT法研究各分级组分的抗肿瘤活性;根据抗肿瘤活性结果,利用中压制备液相色谱对抑制效果最明显组分进行纯化,采用质谱、^(13)C NMR... 详细信息

为了从硫酸盐木质素中提取具有抗肿瘤活性的成分,以不同极性的溶剂对银杏硫酸盐木质素(KL)进行分级,利用MTT法研究各分级组分的抗肿瘤活性;根据抗肿瘤活性结果,利用中压制备液相色谱对抑制效果最明显组分进行纯化,采用质谱、^(13)C NMR等方法确定其结构,并分析构效关系。FT-IR分析结果表明:KL具有与银杏磨木木质素(MWL)相似的结构;分级组分的总酚含量(TPC)随着其相对分子质量增加而降低。抗肿瘤实验结果表明:乙醚可溶组分(LC2)对人源肺癌A549细胞的抑制作用最强,IC_(50)值为(366.09±6.39) mg/L。LC2纯化结果发现,分离出的化合物L7的抗肿瘤活性最好,对肺癌A549细胞的IC_(50)值为(89.44±2.13) mg/L。质谱、^(13)C NMR测试结果表明:化合物L7是酚羟基上连接着2-丙醛取代基的β-5结构的松柏醛二聚体。木质素小分子物质的苯丙烷单元侧链上醛基的增加会提高抗癌活性,但是醚键的增加会降低抗癌活性。

关键词：硫酸盐木质素分级组分生理活性化合物抗肿瘤活性化学结构

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

数智赋能对制造业创新效率的影响机制研究

引用

科技和产业 2024年第8期24卷 125-129页

作者：岳媛媛中共莆田市委党校福建莆田351100

选取2015—2022年制造业上市公司的数据,分析数智赋能如何促进创新效率提升。实证结果表明,数智赋能可以显著提升制造企业的创新效率。如果制造企业的规模超过了门槛值,那么数智赋能对创新效率的作用是正向的,反之为负。随着政府支持力... 详细信息

选取2015—2022年制造业上市公司的数据,分析数智赋能如何促进创新效率提升。实证结果表明,数智赋能可以显著提升制造企业的创新效率。如果制造企业的规模超过了门槛值,那么数智赋能对创新效率的作用是正向的,反之为负。随着政府支持力度变强,数智赋能对创新效率的促进作用逐渐变大。在数智赋能的过程中,制造企业进行开放式创新或者推动融资成本下降,都有利于提升创新效率,这两者发挥着中介作用。

关键词：数智赋能制造业创新效率开放式创新

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ultrafast Manipulation of Transient Energy Transfer Between Surface Plasmons and Resonators in Hybrid Nano-coupling System

引用

Chemical Research in Chinese Universities 2016年第5期32卷 797-802页

作者： yue yuanyuan ZHANG Zhenyu WANG Haiyu State Key Laboratory on Integrated Optoelectronics College of Electronic Science and Engineering Jilin University Changchun 130012 P. R. China

Surface-plasmon（SP） modes triggered on metal nanostructures were strongly coupled to the local restricted electronmagnetic field supported by a Fabry-Perot（F-P） cavity. This hybrid system provided an ideal platform to study the interaction between SP and F-P resonators on nanoscales. However, the time-resolved transient energy transfer process is far from resolved. In this letter, we addressed this question by time-resolved femtosecond pump-probe technology and readily observed the transient energy transfer between SP and nanocavity resonant ener- gy. The interaction resulted in the emergence of hybrid splitting mode and the oscillating dynamics between upper and lower polariton branch（the split hybrid states）. Our work may provide a well comprehension of strong coupling between SP modes and F-P resonator modes, and lay some groundwork for many future photonic applications.

关键词： Energy transfer Surface-plasmon Nano-coupling system Strong coupling Time-resolved femtosecond pump-probe technology

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Green fabrication of hierarchical zeolites from natural minerals

引用

National Science Review 2020年第11期7卷 1632-1634页

作者： yuanyuan yue Haibo Zhu Tinghai Wang Xiaojun Bao National Engineering Research Center of Chemical Fertilizer Catalyst College of Chemical Engineering Fuzhou University

TRADITIONAL PROCESS FOR SYNTHESISING HIERARCHICAL ZEOLITES Zeolites are considered a cornerstone of the modern petroleum and chemical industries, because their human-made synthesis and industrial applications have greatly helped drive the revolutions in petroleum refining and chemical production processes. However, it is widely accepted that the intracrystalline diffusion limitation,

关键词： ALUMINOSILICATE MINERALS ZSM-5 ZEOLITES

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Mesoporogen-free synthesis of hierarchical sodalite as a solid base catalyst from sub-molten salt-activated aluminosilicate

引用

Particuology 2020年第1期18卷 48-54页

作者： Jinbiao Yang Tiesen Li Xiaojun Bao yuanyuan yue Haiyan Liu State Key Laboratory of Heavy Oil Processing China University of Petroleum18 Fuxue RoadBeijing 102249China East-China Design Branch China Petroleum Engineering&Construction Corporation2 Huayan RoadQingdao 266071China National Engineering Research Center of Chemical Fertilizer College of Chemical EngineeringFuzhou University2 Xueyuan RoadFuzhou 350116China

A rapid and environmentally friendly approach to synthesize hierarchical sodalite from natural aluminosilicate mineral without the involvement of any mesoporogen or post-synthesis treatment was *** strategy involves three important steps:the first is the depolymerization of an aluminosilicate mineral into highly reactive silicon and aluminum species with ideal meso-scale structures through activation of a sub-molten *** second step is the hydrolysis and condensation of the activated aluminosilicate mineral into zeolitic precursors that also have a meso-scale *** third is the rapid zeolitization of the zeolitic precursors through the reversed crystal growth route at room temperature and ambient pressure to form hierarchical *** physicochemical properties of the as-synthesized sodalite were systematically characterized,and the formation mechanism of the hierarchical pore structure was *** used as a solid base catalyst for Knoevenagel condensation,the as-synthesized sodalite and its potassium ion-exchanged product with hierarchical micro-meso-macroporous structure both exhibited high catalytic activity and product selectivity.

关键词： Natural aluminosilicate mineral Hierarchical sodalite Reversed crystal growth route Kirkendall effect Solid base catalyst Knoevenagel condensation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

介孔NiAl催化剂催化己二醇绿色合成1,6-己二胺

引用

石油化工 2024年第9期53卷 1237-1244页

作者：王鹏宇李星局严丽岳源源马新宾马雷福州大学化工学院福建福州350108 中国科学院大连化学物理研究所辽宁大连116023 天津大学化工学院天津301999

通过溶胶-凝胶法制备了系列介孔Ni Al催化剂,研究了不同还原温度下Ni含量为20%(x)的介孔Ni Al(20NA)催化剂在1,6-己二醇(HDO)催化氨化合成1,6-己二胺(HMDA)中的催化性能。利用N2吸附-脱附、H_(2)-TPR、CO-TPD、XRD、SAXS、XPS、SEM、TEM... 详细信息

通过溶胶-凝胶法制备了系列介孔Ni Al催化剂,研究了不同还原温度下Ni含量为20%(x)的介孔Ni Al(20NA)催化剂在1,6-己二醇(HDO)催化氨化合成1,6-己二胺(HMDA)中的催化性能。利用N2吸附-脱附、H_(2)-TPR、CO-TPD、XRD、SAXS、XPS、SEM、TEM、ICP-OES等方法对试样进行表征。实验结果表明,低温还原后的20NA催化剂表面金属Ni0粒径较小,具有较高的HDO转化率。440℃还原的20NA催化剂在温和反应温度(190℃)下,HMDA最高产率可达30.9%,除低聚物外的高附加值产物的总选择性高达94.7%(x),HDO转换频率与文献报道的贵金属Ru基催化剂相当。通过调节还原温度可有效控制20NA催化剂表面金属Ni0位点的纳米尺寸。

关键词： 1,6-己二醇己二胺催化氨化介孔NiAl催化剂

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：