速率控制步骤

氢气在钯膜中溶解渗透服从Sievert定律，并且氢的渗透扩散过程是速率控制步骤；

The hydrogen solubility in Pd follows Sievert 's law , and hydrogen diffusion through the bulk of the palladium membrane is the rate determining step .

在铜基催化剂上由CO加氢合成低碳混合醇反应速率控制步骤探讨

Rate determining step of lower alcohol synthesis from co + h_2 over Cu-based catalyst

反应速率控制步骤为吸附的烷氧基与CO的表面反应控制。

The surface reaction is the sole rate-determining step .

结果表明，SiO2与C在高温下生成SiO的反应是SiC晶须生长的速率控制步骤；

The formation reaction of SiO from SiO_2 and C at high temperature is the rate-determing step in SiC W synthesis process .

结果表明，稻壳原料中SiO2与C在高温下生成SiO的反应不仅是生成SiCp，也是生成SiCw的生长速率控制步骤。

It was found that the reaction generated SiO from SiO2 and C in rice hulls with high temperature was not only the rate-determining step of generating SiC particle , but also SiC whisker .

在该模型中，用于决定反应速率控制步骤的Thiele模数定义为转化率的函数。

Thiele modulus dominating the reaction rate was defined as the function of conversion .

在实验温度范围内，Langmuir等温方程能很好地描述LS-40型大孔树脂对二甲胺的吸附行为，吸附过程符合二级动力学方程，液膜扩散为主要速率控制步骤。

In the experimental range , Langmuir isotherm equation can well describe the adsorption behavior of dimethylamine on LS-40 . The exchange of kinetic processes obeyed the second-order kinetic model .

第一个反应阶段为速率控制步骤。

The first process is the r at e - controlling step .

动力学分析表明，物质传递偏向于电极反应的速率控制步骤。

The kinetics analysis showed that the mass transport is partially rate-limiting .

催化蒸馏制乙苯过程的速率控制步骤是液相催化反应。

The rate determined step of this process was liquid phase catalytic alkylation .

改性活性炭对ClO4-的吸附速率控制步骤由外扩散和内扩散模式联合控制。

The adsorption rate controlling step is determined by inner and external diffusion models .

氧化反应由亲核取代反应和α-消除反应组成，α-消除反应是反应的速率控制步骤。

The oxidation reaction consists of nucleophilic substitution reaction and a-elimination reaction which is the rate-determining step .

前者进展缓慢，为整个扩散过程的速率控制步骤。

The former stage develops slowly , which is the control step of the whole diffusion process .

在腐蚀区为环烷酸腐蚀，环烷酸与金属表面的反应为速率控制步骤。

In the passivation region , the diffusion process of sulfide in the surficial layer is the rate-determining step of corrosion .

所以，反应的第一步为速率控制步骤，反应速率只取决于异丁烯的浓度，而与甲醇浓度无关。

Therefore the first step is a process that controls reaction velocity decided by iso-butene concentration , having nothing with methanol concentration .

颗粒内扩散是速率控制步骤之一，膜扩散等也共同影响着吸附过程。

Besides the intra-particle diffusion , other processes such as film diffusion also assume the control on the rate of adsorption simultaneously .

强调聚酯缩聚过程速率控制步骤的判定对聚酯缩聚工艺和反应器设计的优化起关键作用。

The control procedure of polyester condensation rate played a critical role in the optimization of polyester condensation process and reactor design .

钝化区为硫化氢腐蚀，硫化物在膜中的扩散为速率控制步骤；

In the passivation region , the diffusion process of sulfide in the surficial layer is the rate - determining step of corrosion .

通过假设不同的反应机理和速率控制步骤，得到数个脱氢模型，并从拟合精度和参数个数两方面考虑，辨别出最优的模型。

The best model was selected from models assuming different mechanisms and rate-determining steps by standards of fitting accuracy and the number of parameters .

对于烷烃的氧化、醇的氧化及醛的氧化，其速率控制步骤都是质子的迁移过程，因此本论文首先对质子迁移过程进行了详细的考察。

Because the rate determining steps of alkane , alcohol and aldehyde oxidation are all proton transfer processes , the proton transfer process itself was carefully investigated first .

由于氧化反应通常都有水生成，论文特别研究了水对氧化反应速率控制步骤质子迁移过程的影响。

Generally , there is water produced in the oxidation reaction . So , we paied much attention to the influence of water molecules on the proton transfer process .

氧化反应由苄基卤的水解反应和水解产生的苄基醇的氧化反应组成，苄基卤的水解反应是反应的速率控制步骤。

The oxidation reaction was composed of hydrolysis reaction of benzylic halides and oxidation reaction of the resulting benzylic alcohols . The hydrolysis of benzylic halides is the rate-determining step .

反应初期H+消耗是快反应过程，反应后期H+对矿物的溶蚀为速率控制步骤。

H ~ ( + ) consumption was rapid at the initial stage of the reaction , then the slow dissolution of minerals caused by H ~ + became a controlling process .

结果表明，吸附氢原子是对氯苯酚脱氯降解的主要还原剂，发生在催化剂表面的化学反应为整个过程的速率控制步骤。

The experimental results show that adsorbed hydrogen atom is the main reductive agent for dechlorination of p-CP and chemical reaction at the surface of catalyst is the rate-determing step in this process .

通过反应机理的探讨，认为表面脱氢反应是整个反应的速率控制步骤。等离子体还原Pd/AC催化剂时，在其表面产生大量的缺陷位，加快了控制步骤的进行，从而提高转化率。

Based on the discussion of reaction mechanism , surface dehydrogenation becomes the rate-determining step , which can be accelerated by amounts of defects on the catalyst surface and then promotes the overall reaction .

氯甲基化反应由亲电取代反应和亲核取代反应组成，亲核取代反应是反应的速率控制步骤，羟甲基碳正离子（+CH2OH）；是真正有效的亲电试剂。

The chloromethylation reaction consists of electrophilic substitution reaction and nucleophilic substitution reaction , the nucleophilic substitution is the rate-controlling step and the hydroxymethyl cation ( + CH20H ) is the really effective electrophile .

提出了几个数学模型来解释这些现象：（1）极限电流表明阴极气体扩散已成为电池过程的速率控制步骤，用我们的公式模拟得到的U/I曲线与实验曲线能较好地吻合；

Some mathematic models were proposed to explain above mentioned phenomena : ( 1 ) limiting current explained gas diffusion had become the control role in battery process , and the simulated curve fitted the realistic U / I curve ;

进一步分析指出，在超声分子束和脉冲激光条件下，反应中间产物的脱附为蚀刻反应的主要速率控制步骤，并且以激光诱导热脱附为主要机理。

It is pointed out that the laser induced desorption of the reaction intermediates is the rate limiting step of the chemical etching reactions under molecular beam and pulsed laser conditions , and the desorption process may be described as the laser induced thermal desorption .

NaCaVO4在所实验的范围内不与Na2CO3反应，而与NaHCO3反应的浸取速率的控制步骤是HCO3~-离子在NaCaVO4固体表面上的化学吸附。

No reaction occurs between NaCaVO_4 and Na_2CO_3 at least in the experimental range of the present study , the leaching rate of NaCaVO_4 with NaHCO_3 is controlled by the chemical adsorption of HCO_3 ~ - ions on the solid surface .

首先进行了催化剂颗粒和流速对扩散的影响试验，发现表面反应为速率的控制步骤。

Chemical reaction , however , was the rate controlling step .