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强放热
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  strongly exothermal
     The results showed that it is a rapid and strongly exothermal reaction and the reaction rate is controlled by the feeding rate of hydrogen peroxide. Hydrogen peroxide should be dropped during the reaction, and the optimal mass ratio of hydrogen peroxide to phenol is 0.35. The variation of temperature from 50℃ to 80℃ had no effect on the reaction.
     结果表明 ,在 5 0~ 80℃范围内 ,温度变化对反应无影响 ,属于强放热快反应 ,过程受过氧化氢加料控制 ,过氧化氢宜采用滴加的方式加入 ,其最佳用量为苯酚质量的 35 %。
短句来源
     The hydroxylation of phenol to produce dihydric phenol is a rapid and strongly exothermal reaction,the activity of the complex-oxide catalyst decreased rapidly.
     苯酚直接羟化制备苯二酚为液固相的强放热快反应,催化剂的活性衰减很快.
短句来源
  strong reaction heat
     In consideration of the engineering specialities in the development of fine chemicals,a simple method of measuring heat effect for strongly exothermic reaction is recommended,and the scale up methods of batch reactor with strong reaction heat are presented with the chemical reaction kinetics either known or unknown.
     针对精细化学品开发中的工程特点,推荐了一种强放热反应热效应的简易测定方法,并在已知或未知反应动力学的情况下,介绍了强放热间歇反应器的放大方法。
短句来源
  “强放热”译为未确定词的双语例句
     The XRD results show that the products mainly consist of Zr_2Ni, Zr_6Al_2Ni and Zr_5AlNi_4 phases, but no amorphous phase is detected, which is probably associated with the strong-exothermic reaction system and the characteristic of LCS.
     合成产物主要由Zr_2Ni,Zr_6Al_2Ni和Zr_5AlNi_4相组成,没有非晶相存在,这与材料体系的强放热特性有关。
短句来源
     The product was characterized by IR,UV.Combustion heat of product is 3181.75 kJ/mol,which unpuzzle strong exothermic phenomenon in reaction.
     用IR,UV表征了产物。 测定了产物的燃烧热为3181.75 kJ/mol,解释了反应过程中的强放热现象。
短句来源
     The results showed that the exothermal rate was not only the function of temperature but also affected by the concentrations of propylene and catalyst.
     结果表明 ,丙烯聚合这种非线性、强放热、开环不稳定的CSTR与理想的CSTR有着很大的不同 ,放热速率不仅是温度的函数 ,而且受丙烯浓度、催化剂浓度的影响也很大。
短句来源
     Hydrogenation reaction of diethyl oxalate to ethylene glycol was strong exothermal and irreversible reaction in thermodynamic. The optimum conditions of hydrogenation reaction are as follow: the temperature of reaction 220~240 ℃, the pressure of reaction 3.0 MPa,ratio of raw materials hydrogen∶diethyl oxalate=70∶1 (molar ratio).
     乙二酸二乙酯加氢制乙二醇在热力学上是一个强放热不可逆反应 ,经实验得到反应适宜的工艺条件为反应温度 2 2 0~ 2 4 0℃ ,压力 3.0 MPa,氢酯摩尔比 70∶ 1。
短句来源
     (2) The intermediate complex isomerizes to give the sixmembered ring product, The energy barrier is 8.29 kJ·mol-1 at B3LYP/631G* level.
     结果表明:该反应为一个由两步基元过程所构成的复杂反应,反应物首先经过一个无势垒过程形成中间复合物,此中间复合物然后经过过渡态闭环形成六元环产物,第二步过程的活化势垒为8.29kJ·mol-1(B3LYP/6-31G*). 总反应为强放热过程.
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  相似匹配句对
     The numbers of positive nNOS neurons in various ischemic groups were analyzed statistically a using one - way a
     阳性为
短句来源
     Numerical Simulation of Reactor Coupling Exothermal with Endothermal Catalytic Reactions
     放热/吸热耦合催化反应工艺的数值模拟
短句来源
     (b) E has a strong unit;
     (b)E具有单位元;
短句来源
     THE EFFECT OF OPERATING PARAMETERS ON THE HOT SPOT OF A HIGHLY EXOTHERMIC CATALYTIC FIXED BED REACTOR
     操作参数对放热固定床催化反应器床层热点的影响
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This anticle introduces a more aceurate calculating method for the down-film absorber, a main apparatus in the NH_3 absorp tion refrigerating machine. The absorption of NH_3 is both a mass transfer and a heat transfer process. In the process,the temperature of the absorbing solution is not uniformly decreased by cooling. So it is necessary to divide the tube into many small segments in length, and calculate the absorption and heat transfer rate of the segment one by one, until the required absorbing degree of...

This anticle introduces a more aceurate calculating method for the down-film absorber, a main apparatus in the NH_3 absorp tion refrigerating machine. The absorption of NH_3 is both a mass transfer and a heat transfer process. In the process,the temperature of the absorbing solution is not uniformly decreased by cooling. So it is necessary to divide the tube into many small segments in length, and calculate the absorption and heat transfer rate of the segment one by one, until the required absorbing degree of the NH_3 has been reached. Thus the number of segments,the lenth of the tube and the area of absorber can be determined. Comparing the area obtained simply by LMT heat transfer method with the area obtained by the aforesaid method, the latter is much smaller than the former. The way to enhance the heat transfer of the tube, in order to shorten the size of the absorber, is also presented in this article.

本文论述了氨吸收制冷中主要设备降膜式吸收器较为精确的计算方法。由于氨吸收过程为强放热过程,故既有传质过程,又有传热的过程。因为吸收过程溶液的温度不是均匀下降的,故其所需传热面积不能采用一般的平均温度差来计算,而需将管子按长度分为许多微小段,逐段进行吸收和传热计算.求出直到将全部氨气负荷吸收时所需的段数和管长,即求出了设备所需的面积。用对数温度差传热方法计算的设备面积比用逐段传热传质计算所得的结果要大得多。文中还提出了强化传热的措施,以提高设备效率。

The behavior of the oxidation reaction of benzene over vanadium oxide catalysts has been studied in a packed bed tubular reactor. The rate data were correlated by wall temperature of the reactor as a characteristic parameter. This apparent kinetics analysis can be used both for research and process development of benzene oxidation processes. The further oxidation of maleic anhydride in homogenious phase and/or a non-catalytic pellet bed have been studied in a flow reactor. As a half order reac-tion, the rate...

The behavior of the oxidation reaction of benzene over vanadium oxide catalysts has been studied in a packed bed tubular reactor. The rate data were correlated by wall temperature of the reactor as a characteristic parameter. This apparent kinetics analysis can be used both for research and process development of benzene oxidation processes. The further oxidation of maleic anhydride in homogenious phase and/or a non-catalytic pellet bed have been studied in a flow reactor. As a half order reac-tion, the rate constant and apparent activation energy have also be estimated for the oxidation of maleic anhydride.

本文以V_2O_5为主的固体催化剂,研究了苯催化氧化制顺丁烯二酸酐(简称顺酐)的反应特征。以铜块温度作为定性温度分析单管试验结果,得到的床层表观动力学可用于苯氧化反应过程的开发研究。还研究了顺丁烯二酸酐深度氧化反应动力学。顺酐的均相氧化反应速率为: r=7.12×10~6 exp[-28300/RT]C_M~(1/2) 工业反应过程的开发研究中,为确定反应器设计要求及操作条件,必须掌握反应特性和传递规律。用数学模型方法进行工业反应过程开发,对反应特性的了解,要研究反应的动力学。对传递特性要研究催化剂颗粒内部、催化剂颗粒和流体间、床层径向和轴向的传质传热规律。如果能测得正确的反应本征动力学,而对催化剂颗粒内的传递规律不太清楚,则难以应用数学模型方法进行开发。对气—固催化强放热复杂反应,实际上难以获得准确的颗粒动力学。而由苯催化氧化预实验得知,顺酐深度氧化存在着均相氧化反应,因此更难以在实验装置上测得准确的本征动力学。本文则采用单管试验研究反应和传递的综合结果,分析反应特征。同时对顺酐的深度氧化过程进行了详细的考察。为反应过程分析和操作条件的选择提供依据。

The enhancemant of mass and heat transfer in a flow process was investigated. As compared with a smooth surface, the coefficient of liquidsolid mass transfer from the falling liquid film to the tube wall, the heat transfer coefficient were increased by 5—7 times, 2.4—3.7 times and 1.25—1.60 times respectively. Absorption of NH_3 in aqua solution was taken as an example for the absorption process with high heat effect, using a spiral grooved surface in stead of a smooth surface. The absorption capability of the...

The enhancemant of mass and heat transfer in a flow process was investigated. As compared with a smooth surface, the coefficient of liquidsolid mass transfer from the falling liquid film to the tube wall, the heat transfer coefficient were increased by 5—7 times, 2.4—3.7 times and 1.25—1.60 times respectively. Absorption of NH_3 in aqua solution was taken as an example for the absorption process with high heat effect, using a spiral grooved surface in stead of a smooth surface. The absorption capability of the tube was increased by 155—160% and at the same time, the amount of cooling water was saved by 150— 150%.

本文对液体沿带有不同螺距的螺纹表面呈降膜流动时,液膜和固体管壁之间的液-固传质、液膜与管壁之间的传热、以及液膜和膜外的气体之间的气-液传质进行了研究。和流体流过光滑管表面的试验结果相比较,表明螺纹表面对降膜流动中的传递过程产生明显的强化作用,得到相应的关联式。并列出了在降膜流动设备中进行的伴有强放热效应的化学吸收过程的质量和热量传递的数学模型,由此对螺纹管应用于类似过程的实际效果进行了估算。

 
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