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锰铁氧化物
相关语句
  ferromanganese oxide
     Effect of Pulse Electric Field on Reduction of Ferromanganese Oxide
     脉冲电场作用对锰铁氧化物还原影响的研究
     Effect of Pulse Electric Field on Reduction Characteristics of Ferromanganese Oxide
     脉冲电场对锰铁氧化物还原特性的影响研究
短句来源
  “锰铁氧化物”译为未确定词的双语例句
     KINETICS OF ETHANOL OXIDATION TO ACETALDEHYDE OVER Cu-Mn-Fe OXIDE CATALYST
     在铜锰铁氧化物催化剂上乙醇部分氧化反应动力学研究
短句来源
     KINETICS OF GAS-PHASE DEEP OXIDATION OF ACETALDEHYDE OVER Cu-Mn-Fe OXIDES CATALYST
     乙醛在铜锰铁氧化物催化剂上深度氧化反应动力学
短句来源
     PREG-ROBBING AND ADSORPTIVE PHENOMENA OF SILVER CYANIDE COMPLEXES ON SILVER-BEARING MANGANIFERROUS OXIDE ORE
     银氰络合物在含锰铁氧化物银矿石上的吸附与劫金研究
短句来源
  相似匹配句对
     Lubricating Role of Oxides
     氧化物的润滑作用
短句来源
     Terraced hollow oxide pyramids
     氧化物金字塔
短句来源
     Effect of Pulse Electric Field on Reduction Characteristics of Ferromanganese Oxide
     脉冲电场对锰铁氧化物还原特性的影响研究
短句来源
     Effect of Pulse Electric Field on Reduction of Ferromanganese Oxide
     脉冲电场作用对锰铁氧化物还原影响的研究
     PRODUCTION OF ELECTROSMELTING FERROMANGANESE
     电炉锰铁的生产
短句来源
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  ferromanganese oxide
Here, mediation of crust growth by benthic Foraminifera and inhibition of ferromanganese oxide precipitation by high abundances of sessile macrofauna are suggested as two interactive biological processes relevant to crust accretion.
      
Arsenic and other components of the ardennite and associated minerals are derived from highly oxidized ferromanganese oxide- and hydroxide-bearing siliceous pelagic sediments that formed the protolith for the piemontite schist.
      
Instrumental neutron activation analysis of ferromanganese oxide encrustations of Indian Ocean by the k0 NAA method
      
Particle-induced X-ray emission analysis of Eastern Indian ferromanganese oxide ores
      
Ferromanganese oxide ore samples were studied from four different mines by particle-induced X-ray emission (PIXE) technique using 3 MeV proton beam obtained from a 3 MV pelletron accelerator at the Institute of Physics, Bhubaneswar, India.
      


The kinetics of ethanol oxidation to acetaldehyde in gaseous phase was investigated over Cu-Mn-Fe oxide catalyst. A step-wise reduction-oxidation mechanism was suggested according to the results of ethanol oxidation over given catalyst in the absence of oxygen. It was found that both CH3CHO and H2O acted as inhibitors to the reaction and the former was stronger than the latter in this respect. The inhibiting effect of CH3CHO could be elucidated in terms of the competitive adsorption of CH3CHO with EtOH on the...

The kinetics of ethanol oxidation to acetaldehyde in gaseous phase was investigated over Cu-Mn-Fe oxide catalyst. A step-wise reduction-oxidation mechanism was suggested according to the results of ethanol oxidation over given catalyst in the absence of oxygen. It was found that both CH3CHO and H2O acted as inhibitors to the reaction and the former was stronger than the latter in this respect. The inhibiting effect of CH3CHO could be elucidated in terms of the competitive adsorption of CH3CHO with EtOH on the oxidative sites of the catalyst surface.The reaction data were collected using a gradientless recycle reactor in the temperature range of 135 - 190℃ and partial pressure range of PE= (0.1-0.3) ×10-2 atm of ethanol and PO2= (0.5-8) ×10-2 atm of oxygen. A steady state three-stage redox model was deduced to explain the experimental results. The rate equation (1) (see p.126) thus derived gave a satisfactory representation of the rate data of ethanol oxidation. The rate constants of the two redox steps k1, k2 and the equilibrium constant of CH3CHO adsorption K were calculated by the method of least squares multiple linear regression. The deviation between the calculated values of the reaction rate and the experimental results was 6.69%. The activation energies of reduction and reoxidation of the catalyst were 12.53 and 17.47 Kcal/mol respectively, and the adsorption heat of CH3CHO was -9.21 Kcal/mol. A simplified two-stage redox model gave also a good fit to experimental data at lower partial pressure of CH3CHO.

研究了乙醇在铜锰铁氧化物催化剂上的部分氧化反应,包含产物乙醛阻抑作用在内的三步骤Redox机理动力学方程能较好地描述此反应的过程。考察了乙醛的阻抑机理,计算了催化剂还原步骤和再氧化步骤的活化能,并提出了当乙醛分压较低时的简化动力学方程。

The reaction rate data were collected using a gradientless recycle reactor at a temperature range of 150-210℃ and partial pressure range of PA= (0.05-0.2) × 10-2 atm. acetaldehyde and Po2=(0.5-2) × 10-2 atm. oxygen. The experimental results could be satisfactorily represented by the empirical rate equation as follows:

为了更有效地通过催化燃烧法控制醛类对大气的污染,本文以乙醛为例,从动力学角度研究了在铜锰铁氧化物催化剂上的深度氧化反应.实验证明了催化剂表面的结构氧和气相氧对反应的不同依赖关系.得出了能较好地拟合实验结果的反应速度经验公式,计算出表观反应活化能.并讨论了在反应体系中氧分压和有机物分在的相对比例与深度氧化选择性的关系.

Vanda Lake is located in Wright Valley of Antarctica, it is a saline lake with typical dimictic calcium chloride. This paper discusses the vertical geochemical distribution of chromium concentration. In Vanda Lake water, chromium exists in two valence states: Cr6+ and Cr3+. In oxygenated fresh lake water, chromium concentration is low and Cr6+ concentration predominates, and chromium exists in CrO42- form. In reduced brine, chromium concentration is high and Cr3+ concentration predominates and chromium exists...

Vanda Lake is located in Wright Valley of Antarctica, it is a saline lake with typical dimictic calcium chloride. This paper discusses the vertical geochemical distribution of chromium concentration. In Vanda Lake water, chromium exists in two valence states: Cr6+ and Cr3+. In oxygenated fresh lake water, chromium concentration is low and Cr6+ concentration predominates, and chromium exists in CrO42- form. In reduced brine, chromium concentration is high and Cr3+ concentration predominates and chromium exists in Cr(OH)2+ and Cr(OH)2+ form. The important role of sinking particles in the vertical migration of chromium in lake-water is discussed.

南极洲万达湖湖水上部为氧化环境,铬浓度较低,Cr~(6+)占主导地位,主要以CrO_4~(2-)形式存在;下部为还原环境,铬浓度高,Cr~(3+)为主,以Cr(OH)_2~+和Cr(OH)~(2+)形式存在。湖水中锰、铁的氧化物及氢氧化物颗粒对铬离子的吸附和释放过程,控制了湖水铬浓度的变化。

 
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