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Shuman Xu, Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, Xiaohong Ren
《化学科学与工程前沿(英文)》 2018年 第12卷 第4期 页码 780-789 doi: 10.1007/s11705-018-1733-8
关键词: hierarchical ZSM-5 crystal size catalytic cracking Thiele modulus effectiveness factor
Liu Jin-Xun,Wang Peng,Xu Wayne,Hensen Emiel J. M.
《工程(英文)》 2017年 第3卷 第4期 页码 467-476 doi: 10.1016/J.ENG.2017.04.012
费托合成(FTS)是近年来越发重要的能源转化途径,它可将一氧化碳和氢气的合成气转化为液态燃料和化学品,合成气的原料来自煤炭、天然气或生物质。在费托合成反应中,分散的过渡金属纳米粒子作为催化剂,用于催化以碳- 碳键生成为基础的反应。催化剂的催化活性和选择性与纳米粒子的电子结构和几何结构密切相关,具体取决于纳米粒子的尺寸、形态和晶相。在本文中,我们将回顾近期关于费托合成反应催化剂的体相和表面敏感性方面的工作。通过深入理解以上参数对不同催化剂行为的影响,有助于指导设计开发出更高活性、稳定性以及更优选择性的催化剂。
关键词: 费托合成 Fe、Co、Ru 碳化物 尺寸效应 晶相结构
制药工业中结晶过程的最新进展 Review
高振国, Rohani Sohrab, 龚俊波, 王静康
《工程(英文)》 2017年 第3卷 第3期 页码 343-353 doi: 10.1016/J.ENG.2017.03.022
结晶是古老的分离与提纯单元操作之一,如今已发展成为生产具有特定性质的高附加值产品以及建立高效制造过程的技术。本文中,我们综述了制药工业中晶体工程以及结晶过程设计和控制的最新研究进展,系统地总结了理解和开发新型晶体如共晶、多晶型、溶剂化物的方法,包括一些重要的进展,如第一个共晶药物Entresto (诺华) 的诞生以及Orkambi (福泰) 连续制造过程获批。与不同的过程控制策略和新型的结晶器相结合,传统的釜式和日渐成熟的连续结晶过程正不断地满足制药工业的需求。结晶过程的设计和控制已使几种创新型结晶器的设计实现连续操作且性能良好。本文还综述了过程分析技术最新的重要研究进展。
《化学科学与工程前沿(英文)》 2023年 第17卷 第6期 页码 772-783 doi: 10.1007/s11705-022-2280-x
关键词: size-controlled TS-1 crystal modifier steam-assisted crystallization epoxidation
Pengxu YAO,Yaquan WANG,Teng ZHANG,Shuhai WANG,Xiaoxue WU
《化学科学与工程前沿(英文)》 2014年 第8卷 第2期 页码 149-155 doi: 10.1007/s11705-014-1409-y
关键词: extra framework Ti cyclohexanone ammoximation titanium silicalite-1 sodium ion crystal size
Song ZHANG, Lelun WANG, Anze YI, Honggang GU, Xiuguo CHEN, Hao JIANG, Shiyuan LIU
《机械工程前沿(英文)》 2020年 第15卷 第2期 页码 256-264 doi: 10.1007/s11465-019-0573-7
关键词: ferroelectric liquid crystal polarization rotator (FLCPR) dual liquid crystal Mueller matrix polarizer design and optimization
Research progress on ultra-precision machining technologies for soft-brittle crystal materials
Hang GAO,Xu WANG,Dongming GUO,Yuchuan CHEN
《机械工程前沿(英文)》 2017年 第12卷 第1期 页码 77-88 doi: 10.1007/s11465-017-0411-8
Soft-brittle crystal materials are widely used in many fields, especially optics and microelectronics. However, these materials are difficult to machine through traditional machining methods because of their brittle, soft, and anisotropic nature. In this article, the characteristics and machining difficulties of soft-brittle and crystals are presented. Moreover, the latest research progress of novel machining technologies and their applications for soft-brittle crystals are introduced by using some representative materials (e.g., potassium dihydrogen phosphate (KDP), cadmium zinc telluride (CZT)) as examples. This article reviews the research progress of soft-brittle crystals processing.
关键词: brittle soft functional crystal ultra-precision machining
Qianqian Guo, Irmgard Kalf, Ulli Englert
《化学科学与工程前沿(英文)》 2018年 第12卷 第3期 页码 433-439 doi: 10.1007/s11705-018-1743-6
Diffusion reaction of the labile building block Mg(acacCN)2 (acacCN= 3-cyanoacetylacetonate) with silver salts leads to a series of solvated Mg/Ag bimetallic coordination polymers with composition [Mg(acacCN)3Ag]·solvent. Despite their common stoichiometry, the topology of these polymers depends on the solvent of crystallization. The two-dimensional coordination compound [Mg(acacCN)3Ag]·4CHCl3 in space group P
关键词: ditopic ligand substituted acetylacetone desolvation diffraction
《化学科学与工程前沿(英文)》 2023年 第17卷 第10期 页码 1503-1515 doi: 10.1007/s11705-022-2294-4
关键词: insoluble drugs polymer inhibition crystallization crystal growth kinetics DFT calculations
《环境科学与工程前沿(英文)》 2021年 第15卷 第3期 doi: 10.1007/s11783-020-1356-4
•Bacterial concentrations from eight stages were 104–105copies/m3.
关键词: Size distribution Airborne bacteria Biological diversity Human pathogenic bacteria Composting plants
Novel casting processes for single-crystal turbine blades of superalloys
Dexin MA
《机械工程前沿(英文)》 2018年 第13卷 第1期 页码 3-16 doi: 10.1007/s11465-018-0475-0
This paper presents a brief review of the current casting techniques for single-crystal (SC) blades, as well as an analysis of the solidification process in complex turbine blades. A series of novel casting methods based on the Bridgman process were presented to illustrate the development in the production of SC blades from superalloys. The grain continuator and the heat conductor techniques were developed to remove geometry-related grain defects. In these techniques, the heat barrier that hinders lateral SC growth from the blade airfoil into the extremities of the platform is minimized. The parallel heating and cooling system was developed to achieve symmetric thermal conditions for SC solidification in blade clusters, thus considerably decreasing the negative shadow effect and its related defects in the current Bridgman process. The dipping and heaving technique, in which thin-shell molds are utilized, was developed to enable the establishment of a high temperature gradient for SC growth and the freckle-free solidification of superalloy castings. Moreover, by applying the targeted cooling and heating technique, a novel concept for the three-dimensional and precise control of SC growth, a proper thermal arrangement may be dynamically established for the microscopic control of SC growth in the critical areas of large industrial gas turbine blades.
关键词: superalloy investment casting Bridgman process directional solidification single crystal turbine blade
Polymorphism and crystal transformation of penicillin sulfoxide
Dingding JING, Yongli WANG, Zhijian CHEN, Lina ZHOU, Jingkang WANG
《化学科学与工程前沿(英文)》 2011年 第5卷 第4期 页码 442-447 doi: 10.1007/s11705-011-1140-x
关键词: penicillin sulfoxide crystallization polymorphism crystal transformation Raman spectroscopy
Biosorption and biotransformation of crystal violet by
Tao PAN, Suizhou REN, Jun GUO, Meiying XU, Guoping SUN
《环境科学与工程前沿(英文)》 2013年 第7卷 第2期 页码 185-190 doi: 10.1007/s11783-012-0435-6
关键词:
crystal violet
decolorization
biosorption
biotransformation
Computer modeling of crystal growth of silicon for solar cells
Lijun LIU, Xin LIU, Zaoyang LI, Koichi KAKIMOTO
《能源前沿(英文)》 2011年 第5卷 第3期 页码 305-312 doi: 10.1007/s11708-011-0155-9
Evaluation method of multiaxial low cycle fatigue life for cubic single crystal material
CHEN Jiping, DING Zhiping
《机械工程前沿(英文)》 2007年 第2卷 第3期 页码 278-282 doi: 10.1007/s11465-007-0048-0
关键词: orthotropic regression analysis crystal material multiaxial prediction
标题 作者 时间 类型 操作
Effect of hierarchical ZSM-5 zeolite crystal size on diffusion and catalytic performance of n-heptane
Shuman Xu, Xiaoxiao Zhang, Dangguo Cheng, Fengqiu Chen, Xiaohong Ren
期刊论文
Controllable synthesis of a large TS-1 catalyst for clean epoxidation of a C=C double bond under mild conditions
期刊论文
Effect of sodium ions in synthesis of titanium silicalite-1 on its catalytic performance for cyclohexanone ammoximation
Pengxu YAO,Yaquan WANG,Teng ZHANG,Shuhai WANG,Xiaoxue WU
期刊论文
Dynamic modulation performance of ferroelectric liquid crystal polarization rotators and Mueller matrix
Song ZHANG, Lelun WANG, Anze YI, Honggang GU, Xiuguo CHEN, Hao JIANG, Shiyuan LIU
期刊论文
Research progress on ultra-precision machining technologies for soft-brittle crystal materials
Hang GAO,Xu WANG,Dongming GUO,Yuchuan CHEN
期刊论文
Crystal-to-crystal transformation from the triclinic to the cubic crystal system by partial desolvation
Qianqian Guo, Irmgard Kalf, Ulli Englert
期刊论文
Theoretical insights into influence of additives on sulfamethoxazole crystal growth kinetics and mechanisms
期刊论文
The size distribution of airborne bacteria and human pathogenic bacteria in a commercial composting plant
期刊论文
Polymorphism and crystal transformation of penicillin sulfoxide
Dingding JING, Yongli WANG, Zhijian CHEN, Lina ZHOU, Jingkang WANG
期刊论文
Biosorption and biotransformation of crystal violet by
Tao PAN, Suizhou REN, Jun GUO, Meiying XU, Guoping SUN
期刊论文
Computer modeling of crystal growth of silicon for solar cells
Lijun LIU, Xin LIU, Zaoyang LI, Koichi KAKIMOTO
期刊论文