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gas
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  气体
    Study on the Structure of Polyolefin Hollow Fiber Membranes and Their Properties for Gas Separation
    聚烯烃中空纤维膜结构及其气体分离性能的研究
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    Study on the Dynamics of Gas Explosion Process in Confined Space
    受限空间气体爆炸传播及其动力学过程研究
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    QUANTITATIVE GAS CHROMATOGRAPHIC ANALYSIS OF GASEOUS HYDROCARBON MIXTURE
    烃类气体混合物的气相色谱定量分析
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    Reaction Gas Chromatography of Benzamide,Isobutylamide and Acetamide and Its Application to Determination of Benzoyl Groups
    苯甲酰胺-异丁酰胺和乙酰胺的反应气体色谱及其在苯甲酰基测定上的应用
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    Study on chromatographic packings for gas analysis
    气体分析色谱填料的研究
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  “gas”译为未确定词的双语例句
    GAS CHROMATOGRAPHIC ANALYSIS OF 2-(P-CHLOROPHENYL)-3-METHYL-BUTYLNITRILE
    2-(对—氯苯基)-3-甲基丁腈的气液色谱分析法
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    GAS CHROMATOGRAPHIC ANALYSIS OF 2-(PCHLOROPHENYL)-3-METHYL-BUTYLNITRILE
    2-(对—氯苯基)-3-甲基丁腈的气液色谱分析法
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    GAS CHROMATOGRAPHIC ANALYSIS OF ISOBUTYL PIPERAZINE
    异丁基哌嗪的气相色谱分析方法的研究
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    Improvements for Automatic Analysis with Gas Chromatography in Urea Production
    尿素生产色谱自动分析的改进
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    Gas Chromatography Analysis of Organic Impurities in Sulfonation-process Phenol
    磺化法苯酚中有机杂质的气相色谱分析
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  gas
Cauchy problem for linearized system of two-dimensional isentropic flow with axisymmetrical initial data in gas dynamics
      
The explicit solution to Cauchy problem for linearized system of two-dimensional isentropic flow with axisymmetrical initial data in gas dynamics is given.
      
Photocatalytic Oxidation of Aniline in the Gas Phase Using Porous TiO2 Thin Films
      
The gas-phase photocatalytic oxidation of aniline on a new kind of porous nano-TiO2 composite films is investigated.
      
Acetone solution-casting films of poly(methylmethacrylate) were analyzed by differential scanning calorimetry and pyrolysis gas chromatography-mass spectroscopy under natural evaporation and ultrasonic vibration, respectively.
      
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The stoichiometry of the synthesis from CO and H_2 is studied. By performing carbon, hydrogen and oxygen balances around an overall chemical equation, a number of stoichiometric equations relating the various reaction criteria have been obtained. Two of them are given as follows: c=1/3(2-u+m+e_1+d), and K=COx(3-4c+δ). where c, m, e_1=moles of CO_2, CH_4 and C_2H_6 formed per mole of CO converted, respectively; K=volume contraction, per cent; x=CO conversion, per cent; u=H_2/CO usage ratio; CO=volume fraction...

The stoichiometry of the synthesis from CO and H_2 is studied. By performing carbon, hydrogen and oxygen balances around an overall chemical equation, a number of stoichiometric equations relating the various reaction criteria have been obtained. Two of them are given as follows: c=1/3(2-u+m+e_1+d), and K=COx(3-4c+δ). where c, m, e_1=moles of CO_2, CH_4 and C_2H_6 formed per mole of CO converted, respectively; K=volume contraction, per cent; x=CO conversion, per cent; u=H_2/CO usage ratio; CO=volume fraction of CO in synthesis gas; and d, δ=correction terms which can usually be neglected. Various applications of the deduced stoichiometric relationships are described, including methods of testing the consistency of synthesis data, a thorough discussion of the significance of reaction criteria and examples to illustrate the use of the derived equations in certain process computations and in correlation of experimental data. For the calculation of contractions, additional formulas are derived to supplement the work of Bashkirov and of Rapoport.

本文从CO+H_2合成的一个总反应式出发,进行碳、氢和氧三个元素的平衡,结合考虑了反应前後气相分子数的改变,得到一些能够说明反应的基本数量指标间关系的公式,其中较重要的有: c=1/3(2-u+m+e1+d) 及 K=CO_x(3-4c+δ). 式中c、m、e1各为以转化的CO为基数时,CO_2、CH_4、C_2H_6的生成率;K、x、μ各属反应的收缩率、CO转化率和H_2/CO消耗比;CO为原料气中一氧化碳的体积分数;d与δ属可忽略的校正项。合成实验结果表明,对同一催化剂在一定反应压力和循回比下,c几不随x而改变。因此,在原料气不变时,K与x约成正比。根擦推导出的关系式,对各反应指标的意羲及其间关系作了较确切的解释;并提供了一些检验数据准确度和快速判断反应情况的方法。从上述公式推导出来的收缩率计算式補充了,和等人的工作。最後,举例说明了元素平衡的关系式可以方便地用到某些合成工艺计算以及实验数据的初步联系上去。

Low-boiling phenols in low-temperature coal tar are important chemical raw materials. For the identification and determination of the individual phenol boiling below 210℃ in the low temperature coal tar, the methods of gas chromatography, liquid-liquid chromatography followed by ultra-violet analysis and fractional distillation followed by infrared analysis were evaluated and compared. For the same sample, the maximum deviation derived by these three methods was all within 2%. Although the first method...

Low-boiling phenols in low-temperature coal tar are important chemical raw materials. For the identification and determination of the individual phenol boiling below 210℃ in the low temperature coal tar, the methods of gas chromatography, liquid-liquid chromatography followed by ultra-violet analysis and fractional distillation followed by infrared analysis were evaluated and compared. For the same sample, the maximum deviation derived by these three methods was all within 2%. Although the first method was the most rapid one, but the last two gave more comprehensive results. For example, with the gas chromatography method, m-cresol, p-cresol and 2,6xylenol could not be separated, but with the last two methods the composition of each isomer could be determined.

随着煤炼油工业的发展,煤焦油中的酚类,特别是低級酚,作为化工原料的利用很重要,我們应用(1)气液色譜法,(2)液液色譜与紫外光譜法結合及(3)精餾与紅外光譜法結合三种不同方法对210°以前的低級酚进行了各种异构体的成分分析,比較分析結果:三种方法对同一样品进行分析时,最大絕对誤差在2%以内,其中以气液色譜法最为快速,液液色譜法次之,精餾-紅外光譜法費时間較多;但后二种方法所得数据較完全。例如对甲酚,問甲酚及2,6-二甲酚用气液色譜法不能分开,而利用后二种方法則可以分别得到各个单体酚的百分含量。

A simple, but highly sensitive, double-flame hydrogen flame detector is described. Such a detector has been employed in gas-chromatographic analysis of mixtures of unsaturated aliphatic hydrocarbons and hydrogen.

气体色谱氢焰检知器改用双焰装置提高了仪器的灵敏度,克服了单焰法不能分析含氢试样的固有缺点,应用于乙烯基乙炔加氢产物的分析获得满意结果。

 
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