The trend of metallization degree change suggested the reaction in pellet was first controlled by chemical reaction, and then it gradually changed to diffusion control. 球团金属化率的变化趋势表明球团在反应开始是由化学反应控速环节控制,而后逐渐向扩散控速环节过度。
Results showed that the process was in film diffusion control in the experimental velocity range. 结果表明,在实验操作的流速范围内,过程属于外扩散控制。
Experimental data of isoflavones extraction were fitted respectively by core shrink model without diffusion resistance and diffusion control model. 以实验测得的大豆异黄酮提取率随提取时间变化的数据,按照无扩散阻力的缩核模型和有效成分扩散控制模型分别进行了数据处理。
Ion replacement process was controlled by intraparticle diffusion control ( PDC)( to see Fig.3). 离子取代凝胶对二价离子的取代属于颗粒扩散控制机理。
The results showed that the negative effect of dust on the regeneration behavior becomes serious with temperature rising in the O 2-containing atmosphere, but the following sulfidation breakthrough behavior of regenerated sorbents had little defference, which may be related to the diffusion control mechanism of desulphurization process. 结果表明,在含氧气气氛再生时,随着温度的升高,粉尘对再生负面的影响越来越显著,但是对二次脱硫活性的影响很小,这可能与脱硫过程为内扩散控制有关;
E. chemical reaction control and diffusion control. 酚醛树脂的固化通常由化学反应控制和扩散控制两阶段组成。
The dynamic and thermodynamic behavior was well represented by diffusion control model and steady-state reaction model, and the maximum of adsorption in monomolecular layer was 8. 62mg/ g. 该吸附剂除磷的动力学和热力学性能可分别用扩散控制模式和稳定状态固定反应吸附等温式得到较好的描述,求得单分子层最大吸附量为8.62mg/g。
The new application of Thermo-Calc and DICTRA ( Diffusion Control phase TRAnsformation) software package to study high-property steel is introduced. 介绍了ThermoCalc和DICTRA软件系统及其在高性能钢研制中的最新应用。
This indicates that the combustion of PC can be divided into three phases: kinetics control, diffusion control and again kinetics control. 说明石油焦的燃烧经历动力控制到扩散控制最后再动力控制的过程。
False Diffusion Control in Simulation of Pollutants 'Diffusion in Air 污染物大气扩散数值模拟中伪扩散的控制
The thermal degradation reaction is one-step reaction in nitrogen and the mechanism of the thermal degradation was deduced preliminarily as diffusion control. 它的热降解反应为一步反应,热降解机理初步推断为扩散控制机理。
Characteristics of Freeze drying under the Mass Diffusion Control 质量传递控制下的冻干特性研究
Based on the diffusion control model and reaction kinetics control model, the burning out time of volatile is calculated respectively. 在扩散控制、动力控制条件下,分别对蔗糠挥发分燃烬时间进行了计算。
Both the theoretical models for volume diffusion control and boundary diffusion control are well developed under the assumption of the disorder interface between pearlite and austenite and based on the steady-state diffusion equation. 基于珠光体与奥氏体间的无序界面假设和稳态扩散方程分别发展了以体扩散控制和以界面扩散控制为主的动力学理论。
The diffusion control model has been treated in terms of the finite difference method. 本文用有限差分法处理了扩散控制模型;
The reaction was a diffusion control process. Its apparent activation energy was 4~ 7kJ/ mol. 该反应属于扩散控制,反应活化能约为4~7kJ/mol。
The results show that the interaction of Cu ( phen) 2+ 2 with 6-MP is proved to exist under diffusion control or electrochemistry control. 结果显示.Cu(phen)2+2MP与6-MP无论在扩散控制过程或电化学控制过程都发生了相互作用。
Hydration process belongs to diffusion control with exothermic reaction. 由于水合过程受气液扩散控制,并且是放热反应。
Immobilized SOD were obtained by absorption, entrapment and covalent cross-linking, and all the immobilized enzyme activities were low. It appears that reaction rate of the copper and zinc containing superoxide dismutase with superoxide anion is near the limit of diffusion control. 采用吸附、包埋、共价交联等方法固定化超氧化物歧化酶(SOD)所得固定化酶活力回收都不高,表明酶的催化反应速率受超氧阴离子自由基(O2~-)扩散速率的控制。
The unreacted shrinking core model was used for describing the reaction-relative and diffusion-relative phenomena presented in the process of the electro-generative leaching with and without bacteria, which is considered to be diffusion control. SEM was used to study the effect of A. 采用未反应核模型来研究有菌和无菌发电浸出过程中化学反应和扩散现象、采用SEM研究同时发电浸出中A.实验结果较好地拟合化学反应控制阶段的未反应芯收缩模型。
The apparent activation energies assessed are: 8.0~ 28.0 kJ/ mol and> 90.0 kJ/ mol for the reduction processes under gas intrinsic diffusion control and solid state iron ion diffusion control respectively; 得出:气体内扩散控速和铁离子固态扩散控速时,还原过程的表观活化能分别为8.0~28.0kJ/mol和>90kJ/mol;
Kinetics of sulfuric acid leaching can be described with unreacted shrinking core diffusion control model in whole time scale, and the activation energy of zinc leaching was less than that of iron leaching. 硫酸浸出动力学可采用整段收缩未反应芯扩散控制模型描述,且锌浸出的活化能低于铁浸出的活化能。
The results of kinetic investigation showed that the main rate determining step was diffusion control of liquid film. 动力学研究结果表明,树脂与游离脂肪酸的离子交换过程的主控速步骤是液膜扩散控制。
An analysis of chronoamperometry and chronopotentiometry further proves the conclusion reached by cyclic voltammetry that the reduction process of aluminum ion is a diffusion control step. 通过计时电流和计时电位的分析进一步佐证了循环伏安得出的结论,即铝离子还原过程为扩散控制步骤。
Under the condition of this experiment, the coal char is in the chemical reaction control area at the beginning, and then turn to the diffusion control area. 在本试验的条件下,煤焦在燃烧初期处于化学反应动力控制区,后向内扩散控制区转变。
Adsorption kinetics study shows that waste of natural zeolite on the adsorption of lead in sulfuric acid electrolyte, the initial step by the membrane diffusion control, until liquid disappears, the particle diffusion is the control step. 吸附动力学研究表明,天然沸石对废电解液硫酸中铅的吸附初期由膜扩散控制步骤,待液膜消失后,颗粒扩散为控制步骤。
CV curves under different scan rates showed the process of copper deposition was diffusion control. 不同扫描速率的CV曲线表明添加剂存在情况下,铜电沉积过程是受扩散控制。
Electrochemical test results showed that formic acid electrooxidation on Pd was a completely irreversible reaction with diffusion control. 电化学测试结果表明:甲酸在纳米Pd上的电氧化是完全不可逆反应,反应受扩散步骤控制。