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reduction properties
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  还原性能
     The Ce_0.52Zr_0.4La_0.05Sr_0.03O_1.945 mixed oxide had the largest specific surface area, and better reduction properties and better oxygen storage capacity.
     Ce_(0.52)Zr_(0.4)La_(0.05)Sr_(0.03)O_(1.945)混合氧化物最好的比表面积、还原性能和储氧性能。
短句来源
     The chemical states and composition of the surface species of sulfided MoO_3/γ--Al_2O_3 catalysts with the promotion of variable KCI contents have been investigatedand correlated to the sulfidation and reduction properties of the catalysts by meansof XPS,XRD,ESR and TPR techniques.
     应用XPS、XRD、ESR 和TPR 技术分析了KCl 助剂含量变化对MoO_3/γ-Al_2O_3催化剂表面物种状态、组成及其硫化还原性能的影响.
短句来源
     Investigation of the Fe3+ Reduction Properties of Shewanella decolomtionis S12
     脱色希瓦氏菌S12的铁还原性能研究
短句来源
     The results show that the cerium content, the cerium source and the radio of silica to aluminum oxide of zeolite have influenced the reduction properties of catalysts.
     考察了铈含量、不同硅铝比、不同铈源对催化剂还原性能的影响。
短句来源
     In this paper,CO oxidation activity and reduction properties of rare earth oxides supported copper oxide catalyst were investigated. The oxidation activity of CeO2 support catalyst is the higest in all catalysts.
     考察了稀土氧化物负载CuO催化剂的CO氧化活性和还原性能,发现CuO/CeO2催化剂具有很高的CO氧化活性,65℃时,CO转化率可达95%.
短句来源
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  还原特性
     The catalysts were characterized by XRD, BET, H_2-TPR and XPS. The results showed that the incorporation of CuO improved reduction properties of the catalysts, resulting in lowering of the reduction temperature for Fe_2O_3 by about 100 ℃.
     对样品进行了XRD、BET、H2-TPR和XPS表征,结果表明,CuO助剂进入了Fe3O4的反尖晶石结构的八面体空隙,置换Fe2+与Fe3O4发生相互作用,改变了催化剂的还原特性,使Fe2O3还原为Fe3O4的还原温度降低了100℃左右。
短句来源
     Study on Electrochemical Reduction Properties of Nitrobenzene
     硝基苯的电还原特性研究
短句来源
     It plays an important role in the electrochemical properties of Gc/AQ/Os (bpy)3 and Gc/AQ/Os (bpy)/pvp modified electrodesd and the nitrite reduction properties at these modified electrodes.
     它对由GC/AQ/Os (hpy)_(3)~(2-)阳离子交换聚合物及PVP阴离子交换聚合物组成的双层聚合物复合修饰电极的电化学特性及对酸性溶液中NO_2~-的催化还原特性有重要作用。
短句来源
     Catalysts from different preparation methods were studied over their performance and fractional dimension was applied to characterize them The characterization methods of EDX,TPR,XRD and XPS were used to analyze catalyst surface components and their reduction properties The reason why catalyst prepared by layer impregnation showed good performance was explored
     考察了反应体系中不同制备方法制得催化剂的催化性能,并将分形维数应用于催化剂制备; 采用了EDX、TPR、XRD 和XPS 等表征手段分析了不同制备方法制得催化剂的表面组成以及还原特性,探讨了层浸法制备的催化剂性能最佳的原因。
短句来源
     The research project is founded by national natural science foundation of China and BAOSWTEEL steel unite foundation (No.50174001). The aim of this article is to investigate the reduction mechanism and reduction properties of iron scraps immixed waste plastics and explore the effect of immixed waste plastics on iron scrap direct reduction.
     本课题得到了国家自然科学基金和宝钢钢铁联合基金的资助(项目号№50174001),工作的目的是研究内配废塑料铁鳞直接还原的机理和还原特性,探寻内配塑料对铁鳞直接还原的影响。
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  “reduction properties”译为未确定词的双语例句
     Effect of Preparation Method on Structure and Reduction Properties of Ce_xZr_(1-x)O_2 Solid Solutions
     制备方法对Ce_xZr_(1-x)O_2固溶体结构及性能的影响
短句来源
     Ce_(0.6)Zr_(0.35)Pr_(0.05)O_2 nano solid solution was prepared by coprecipitation method,and the crystal phase structure,partical size,reduction properties and thermal-stability of sample were characterized by TG-DTA-DTG,XRD,TEM and H_2-TPR.
     用共沉淀法制备出Ce0.6Zr0.35Pr0.05O2纳米固溶体,并利用TG-DTA-DTG、XRD、TEM和H2-TPR等方法对样品的物相结构、晶粒大小、还原性及高温热稳定性进行表征。
短句来源
     The results indicate the formation of the redox cycle Mo 6+ +Ag 0Mo 5+ (Mo 4+ )+Ag + and occurrence of synergetic effect between AgMoO 2PO 4 and MoO 3 in Ag-Mo-P-O catalyst,leading to improving the reduction properties and transfer of electron.
     结果表明,在Ag-Mo-P-O催化剂中形成Mo6++Ag0 Mo5+(Mo4+)+Ag+的氧化-还原循环,并且在催化剂中AgMoO2PO4和MoO3两相之间存在由"一致性界面"引起的协同效应,提高了催化剂的氧化还原性。
短句来源
     The rapid method for simultaneous determination of Fe~(2+) and Fe~(3+) ions content is introduced, which is based on the electrochemical oxidation and reduction properties of Fe~(2+) and Fe~(3+) ions on platinium electrode in acidic medium.
     本文根据酸性介质中Fe~(2+)和Fe~(3+)离子在铂电极上电化学氧化和还原的特性,提出同时测定镀液中Fe~(2+)和Fe~(3+)离子浓度的快速方法。
短句来源
     The results from the infrared spectrum (FT-IR) show that the bond of the Mo=O is weakened due to the bond of the RE-O-Mo, leading to the increase of the reduction properties of the RE-Mo composite oxide powders.
     红外光谱(FT-IR)分析结果表明,La 和 Y 通过 O 与 Mo 键合,削弱 Mo=O 键,使稀土钼复合氧化物可还原性增强。
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  reduction properties
The addition of dolomite to iron ore pellets improves high temperature reduction properties, primarily by increasing their softening point and reducibility.
      
The results show that the SDS-functionalized MWCNTs exhibit good anti-wear and friction reduction properties as well as enhanced load-carrying capacity.
      
The antiwear and friction reduction properties of the novel compound are similar to those of ZDDP and ZDTC; and its load-carrying capacity is similar to ZDTC, but is better than ZDDP.
      
Effects were found for the electronic structure of the substrates and basicity of the medium (pKα of the pyridines) on the oxidation-reduction properties of the reagents and the efficiency of the reactions studied.
      
Oxidation-reduction properties of macrocyclic complexes of the transition metals
      
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It is known that hydrogen peroxide can act either as an oxidizing agent or as reducing agent under different conditions. This article has emphatically illustrated that whether H_2O_2 acts as an oxidizing agent or reducing agent depends on the electromotive force EMF of the reaction. In general, the reaction which has the largest EMF value proceeds first. The potential-PH diagram of H_2O_2 is plotted for explaining its special oxidation-reduction properties. In addition, this article also gives examples...

It is known that hydrogen peroxide can act either as an oxidizing agent or as reducing agent under different conditions. This article has emphatically illustrated that whether H_2O_2 acts as an oxidizing agent or reducing agent depends on the electromotive force EMF of the reaction. In general, the reaction which has the largest EMF value proceeds first. The potential-PH diagram of H_2O_2 is plotted for explaining its special oxidation-reduction properties. In addition, this article also gives examples to illustrate that kinetic factors exert a tremendous, influence on the result.

我们知道,H_2O_2在不同条件下既可作氧化剂又可作还原剂。但是它在什么情况下作氧化剂?又在什么情况下作还原剂呢?本文着重阐述了H_2O_2扮作氧化剂或扮作还原剂主要取决于反应电动势的大小。一般是电动势最大的首先反应。本文也绘制了H_2O_2的电位-pH图,并以此解释其氧化-还原特性。此外,本文也举例说明了动力学因素所起的巨大作用。

ZnFe2O4, ZnCrFeO4and their supported catalysts (on TiO2, SiO2and γ-Al2O3) are prepared by precipitation and impregnation respectively. The loading of supported components is all about 25%.Several techniques(TPR,XRD,ESR,MBSand pulse reaction)are used to characterize these catalysts. The results show that supports can change the oxidation-reduction properties of catalysts to a greater or lesser degree. It seems that unsupported ZnFe2O4catalyst is deeply reduced and more difficultly to be reoxidized as compared...

ZnFe2O4, ZnCrFeO4and their supported catalysts (on TiO2, SiO2and γ-Al2O3) are prepared by precipitation and impregnation respectively. The loading of supported components is all about 25%.Several techniques(TPR,XRD,ESR,MBSand pulse reaction)are used to characterize these catalysts. The results show that supports can change the oxidation-reduction properties of catalysts to a greater or lesser degree. It seems that unsupported ZnFe2O4catalyst is deeply reduced and more difficultly to be reoxidized as compared with the corresponding supported catalysts . The oxidation-reduction properties of the active phase of γ-Al2O3are quite good compared with that of active phase on SiO2, whereas TiO2only has a slight effect on this aspect.The spinel phase whether is on the support or not is not very sensitive to reduction-reoxidation treatment for several times. Because of the interaction between the support and supported component, the trend of forming the spinel structure on the supports is TiO2 > SiO2 > γ-A12O3. Supported ZnO component reacts mainly with y- Al2O3to produce ZnAl2O4instead of ZnFe2O4, so the amount of ZnFe2O4or ZnCrFeO4phase on γ-Al2O3is small. Similarly, the interaction between SiO2and supported iron oxide hinders the formation of ZnFe2O4phase on SiO2. On the contrary, the ZnO and iron oxide on TiO2react with each other completely to form almost pure spinel phase on the support .The iron oxide on different supports has a different stability .The iron oxide on SiO2is more stable than that on γ-Al2O3but it generally turns into some amount of ferromagnetic substance when treated. The addition of Cr component to the catalyst is favourable to forming the spinel structure on supports and improves the oxidation-reduction properties of catalysts. When Cr is added, only pure spinel phase exists on supports except γ-A12O3. Some supported catalysts on which the spinel structure cannot be formed easily have complex composition. Most of the active phase of these catalysts is iron oxide with various forms, including α-Fe2O3, γ-Fe2O3and small particles of Fe3+. The number of these small particles is much more on SiO2than that on γ-Al2O3. They exist not only on the surface but also in the bulk. There are much more num-ber of such small particles on the surface of SiO2 compared with that on the surface of γ-Al2O3. Maybe these small particles containing Fe3+ are quite stable and not sensitive to the oxidation-reduction treatment. The results of pulse reaction show that either the pure spinel phase which exists on TiO2and SiO2or the iron oxide which exists on γ-A12O3 are active for the oxidative dehydrogenation of 2- C4H8to C4H6without oxygen supply. However, the catalytic activity of these catalysts all decreases quickly compared with that of catalyst containing predominantly spinel phase and some amount of iron oxide . Under the reaction condition without oxygen supply, the lattice oxygen of spinel phase is not very active and only few layers near the surface is consumed.On the other hand, the lattice oxygen of iron oxide on γ-Al2O3is highly reactive, and its consumption is fast which maybe make the catalysts lose their activity quickly. When ZnFe2O4is supported on SiO2, Fe3+in the catalyst is difficult to be reduced, so the reaction of selective oxidation cannot be carried out easily which results in its low catalytic activity. When the lattice oxygen at surface with suitable activity is consumed and Fe3+is reduced to Fe2+with successive pulse number of 2-C4H8, the activity of catalyst to selective oxidation decreases and the isomerization of 2-C4H8to l-C4H8becomes notable. It implies that maybe there is a relationship between the spinel phase and iron oxide for the reaction. It is possible that the catalytic activity and selectivity of supported catalysts can be improved by controlling the relative amount of supported oxide component in order to form predominantly spinel phase and some amount of iron oxide phase on certain supports.

用共沉淀法和浸渍法制备了ZnFe_2O_4、ZnCrFeO_4以及它们在γ-Al_2O_3,TiO_2,SiO_2小球上的担载催化剂.用TPR.XRD.ESR,MBS,脉冲反应等技术对这些催化剂进行了考察.结果表明,载体的引入在不同程度上改变了催化剂的氧化还原性能.在不同的载体上形成尖晶石结构的趋势不同.铁酸盐尖晶石相无论是非载的还是担载的对于多次交替的氧化还原处理不敏感.然而氧化铁相则较不稳定,而且在不同载体上稳定性相差较大.加Cr组份有助于担体上形成正尖晶石相.在某些较难形成铁酸盐尖晶石相的担载催化剂中,其相的组成较为复杂.脉冲反应的结果表明,担载的单一正尖晶石铁酸盐以及γ-Al_2O_3上的氧化铁对丁烯氧化脱氢均有一定的活性,对于既含较多量正尖晶石铁酸盐又含一定量氧化铁的催化剂,其较好的催化性能暗示在这两相之间可能存在某种协同效应.

The velocity distribution and drag factor of Mexwell fluids in turbulent flow were obtained by using Prandtl's mixing length theory and Maxwell model. The results showed that viscoelasticity of fluids caused drag reduction and delayed flow regime transition.The turbulence and drag reduction properties of PAM solutions were measured by laser-doppler anemometer. The experimental data were in good agreement with the theory.

运用混合长度理论和 Maxwell体模型,从理论上推导出了Maxwell 体在紊流流动过程中的速度分布和摩擦阻力系数。研究表明,流体的粘弹性能引起流动阻力减小和转捩的延迟。用激光多普勒测速计(LDA)测试了聚丙烯酰胺(PAM)水溶液的紊流及减阻特性,实验结果和理论验证较吻合。

 
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