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major elements
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  “major elements”译为未确定词的双语例句
    In this article, major elements(Fe,Ca,Mg ,Si,Na,K,AI,Ti) and trace elements(Cu ,Sc,V,Be,Mn,Ni) in coal fiy ash were determined by sequential ICP spectrometer.
    本文采用顺序等离子体光谱技术测定煤飞灰中主要成份(Ca、Mg、Fe、Al、Si、Na、K、Ti)及微量成份(Cu、Sc、V、Ni、Be、Mn)。
短句来源
    A preliminary study on the correlations among major elements,trace elements,and parametersof coal hydrocarbon-generation in low rank coal
    低熟煤中常量、微量元素与煤生烃潜力参数的相关性研究
短句来源
    Gasoline and diesel oil are principal forms of irrecyclable liquid fuel. New national standard for fuel oil will soon be publicized, which intends to control the content of sulfur compounds and olefin. The harmful substance left by the burning of sulfur and olefin contained in gasoline has become one of major elements of environmental pollution.
    汽油和柴油是一次性消耗液体燃料的主体,国家关于新的燃油标准即将出台,新的标准主要是控制成品油中硫化物和烯烃的含量,汽油中的硫和烯烃在燃烧后释放的有害物质是污染环境的重要因素;
短句来源
    There are five major elements which contribute to the overall efficiency of any IGCC system. That are includingthe fuel conversion, gas turbine cycle, steam cycle, heat by-pass ratio and generation efficie- ncy.
    影响煤气化联合循环总效率的五个主要因素为煤转化率、燃气轮机循环,蒸汽循环,热旁路比率和发电效率。
短句来源
    Usually, only simple systems containing arsenic or selenium together with coal major elements and chlorine is considered, and in this system only gas and condensed phase exist.
    本文综述了热力学平衡分析方法应用于砷和硒在燃煤过程中形态转化和平衡分布等方面的研究进展。 首先用于热力学平衡分析的是只含有砷或硒一种微量元素和煤中主量元素及氯元素的简单体系 ,并假设烟气中只有理想气体组成的气相和纯凝聚相的理想模型。
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  major elements
Organic Carbon versus Major Elements Relationship in Rocks of the Bazhenov Formation, Western Siberia
      
These components chiefly determine the spectrum of major elements in the Bazhenov Formation.
      
Distribution of rare earth, trace, and major elements was studied in sandy rocks and early diagenetic formations (glauconites and phosphorites).
      
The major elements of the evolution of carbon isotope signature could be retained since the sedimentation stage.
      
The coefficients of migration in water are evaluated, and the major elements with respect to which surface waters enrich under anthropogenic load are identified.
      
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There are five major elements which contribute to the overall efficiency of any IGCC system. That are includingthe fuel conversion, gas turbine cycle, steam cycle, heat by-pass ratio and generation efficie- ncy. Among which, the greatest contribution comes from the overall fuel conversion efficiency which includes sensible heat of the product gas and surplus steam. The gasifier itself is clearly the most important part of any gasification plant and has a strong influence on its performance. In order to...

There are five major elements which contribute to the overall efficiency of any IGCC system. That are includingthe fuel conversion, gas turbine cycle, steam cycle, heat by-pass ratio and generation efficie- ncy. Among which, the greatest contribution comes from the overall fuel conversion efficiency which includes sensible heat of the product gas and surplus steam. The gasifier itself is clearly the most important part of any gasification plant and has a strong influence on its performance. In order to improve efficiency of gasification, pressurized operation has already been introduced into all type of second generation gasifier. In this paper, the desirable characteristics of gasification systems, that are including high temperature, scale-up capacity, load following capacity, coal feed system, gasification agents and gas cleanup system are discussed and some attention given to problems for which development solutions are still required.

影响煤气化联合循环总效率的五个主要因素为煤转化率、燃气轮机循环,蒸汽循环,热旁路比率和发电效率。其中以煤转化率影响最大,它将包括产品气的显热和剩余蒸汽。在任何气化装置中气化炉是最主要单元并极大地影响气化性能。为改善气化效率,所有第二代气化方法均已引入加压操作。本文讨论了高温操作、生严能力放大、负荷跟踪能力、加煤方式、气化剂和煤气净化,同时提出仍待开发的某些值得注意的问题。

In this article, major elements(Fe,Ca,Mg ,Si,Na,K,AI,Ti) and trace elements(Cu ,Sc,V,Be,Mn,Ni) in coal fiy ash were determined by sequential ICP spectrometer. The spectral interferents and line seletion were investigated with spectrum scan. The ash samples were dissolved in the mixture of nitric acid, perchloric and hydrofluoric acid. The results argree with certifiml values for determination of NBS 1633A coal fly ash. The method have been employed in comparison of new standard referenee material...

In this article, major elements(Fe,Ca,Mg ,Si,Na,K,AI,Ti) and trace elements(Cu ,Sc,V,Be,Mn,Ni) in coal fiy ash were determined by sequential ICP spectrometer. The spectral interferents and line seletion were investigated with spectrum scan. The ash samples were dissolved in the mixture of nitric acid, perchloric and hydrofluoric acid. The results argree with certifiml values for determination of NBS 1633A coal fly ash. The method have been employed in comparison of new standard referenee material of coal fiy ash.

本文采用顺序等离子体光谱技术测定煤飞灰中主要成份(Ca、Mg、Fe、Al、Si、Na、K、Ti)及微量成份(Cu、Sc、V、Ni、Be、Mn)。用扫描光谱法研究了分析线的选择和光谱背景的扣除。试样用密封罐混酸溶解。测定煤飞灰标准样品NBS1633a的结果与标准值一致。方法用于测定新制备的煤飞灰标准参考物。

Arsenic and selenium are considered to be toxic and volatile trace elements in coal. A review about thermodynamic equilibrium analysis applied to arsenic and selenium speciations from coal combustion is given in this paper. Usually, only simple systems containing arsenic or selenium together with coal major elements and chlorine is considered, and in this system only gas and condensed phase exist. It is now of great interest to investigate arsenic and selenium behavior during coal combustion in a complex...

Arsenic and selenium are considered to be toxic and volatile trace elements in coal. A review about thermodynamic equilibrium analysis applied to arsenic and selenium speciations from coal combustion is given in this paper. Usually, only simple systems containing arsenic or selenium together with coal major elements and chlorine is considered, and in this system only gas and condensed phase exist. It is now of great interest to investigate arsenic and selenium behavior during coal combustion in a complex system where they coexist with all the coal major and minor elements and halogen, or containing not only ideal gas and condensed phase but molten phase in order to determine thermodynamic dominant species of arsenic or selenium and their elemental chemistry after considering all the possible interactions .

砷和硒是煤中的易挥发有毒微量元素。由于砷和硒在燃煤烟气中的浓度极低以及实验条件的限制 ,目前化学热力学平衡分析已成为预报烟气中砷和硒等有毒元素形态分布的主要理论分析方法。本文综述了热力学平衡分析方法应用于砷和硒在燃煤过程中形态转化和平衡分布等方面的研究进展。首先用于热力学平衡分析的是只含有砷或硒一种微量元素和煤中主量元素及氯元素的简单体系 ,并假设烟气中只有理想气体组成的气相和纯凝聚相的理想模型。然而是否考虑砷和硒与其他微量、主量或次量元素的相互作用 ,砷和硒所有可能存在的反应 ,以及在熔融相砷和硒与熔融物的结合会严重地影响模型的预报结果 ,因此 ,目前热力学平衡体系已发展成为含有包括砷和硒在内的多个微量元素和煤中所有主量、次量元素 ,以及包括熔融相在内的非理想多相复杂体系

 
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