Kinetic model of alkylation considering internal diffusion factors and supercritical fluid density 基于超临界流体密度的烷基化内扩散影响动力学
The Effect of Internal Diffusion on Heterogeneous Phase Reaction 内扩散效应及其对非均相反应的影响
The apparent activation energies of the complete oxidation of isobutyl alcohol was 26.0 kJ/ mol in the kinetic region and 23.7 kJ/ mol in the internal diffusion region. 反应在动力学区域时,异丁醇完全氧化的活化能为26.0kJ/mol,而在内扩散区域时,反应活化能为23.7kJ/mol。
Effect of Internal Diffusion on Effectiveness Factor of Catalysts with Nonuniform Activity Profiles and Independent Deactivation 内扩散对伴有独立均匀失活的活性非均匀分布催化剂有效因子的影响
When the thickness of catalyst was increased to 4 mm, the reaction occurred in internal diffusion region. 当催化剂厚度增大到4mm时反应在内扩散区域进行。
The coke reaction with CO_2 is mainly controlled by the internal diffusion at lower temperatures, while with the increasing of reaction temperature, it is controlled by a combination of external diffusion, chemical reaction and internal diffusion. 焦炭溶损反应在低温区主要受内扩散控制,随着温度升高,反应由外扩散、化学反应和内扩散三步控制;
The aim, scope and importance of biochemical reaction engineering are expounded, and the intrinsic kinetics of microbial growth, product formation arts substrate consumption as well as the macro-kinetics of external and internal diffusion effects of biocatalyst particle or film are systematically introduced. 本文阐明了生化反应工程的目的、范围和重要性。并对微生物生长、产物形成和基质消耗的本征动力学以及对生物催化剂颗粒或膜的内外扩散影响的宏观动力学作了较系统的介绍。
In medium temperature area, reaction rate is severely affected by internal diffusion and the apparent activation energy is about a half as that of kinetic control area. 中温区为内扩散严重影响区,其表观活化能约为反应动力学控制区活化能的一半;
Drying of plant powder and granulated material with high moisture content demands that the drying equipment can meet certain external diffusion intensity condition and certain internal diffusion condition. 植物型高水分粉粒状物料的干燥,对干燥设备既有外扩散强化的要求、也有内扩散传递条件的要求。
It is shown that the mesoporous structure decreases greatly the internal diffusion of big molecules and thus bring out high activity, selectivity and stability of the supported amorphous alloy catalyst. 研究表明,中孔结构有利于减少体积较大分子的内扩散效应,发挥负载型非晶合金的高活性、选择性和稳定性。
Effect of pellet internal diffusion on deactivation rates of porous catalysts 颗粒内扩散对多孔催化剂失活速率的影响
The resistance values of alkylation process are in the following order: gas-liquid film> liquid-solid film> internal diffusion and reaction. 固定床鼓泡反应器中烷基化反应过程阻力的大小顺序为:气液膜阻力>液固膜阻力>内扩散阻力与化学反应阻力之和。
Study on the kinetics of immobilized enzyme reaction with internal diffusion limitation using single size particle 单一粒度法研究固定化酶内扩散限制的酶应动力学
The Effect of Internal Diffusion for Isobutyl Alcohol on the Rate Equation with-0.6 Order 异丁醇的内扩散对-0.6级速度方程的影响
Internal heat diffusion process is the base of the study on drying mechanism and technology. 物料内部湿热扩散过程是干燥设备和干燥技术研究的基础。
The technique of solid-electrolyte-potentiometry ( SEP) was used to investigate the effect of internal diffusion. 采用固体电解质电位测定技术进行了内扩散影响的考察。
First, residence time range excluding external diffusion limitation and the average size range excluding internal diffusion were determined limitations by changing the loading amount and size of the catalyst, respectively. 首先,通过改变催化剂填装量的方法,确定了消除外扩散影响的反应物停留时间范围,然后通过改变催化剂粒径的方法,确定了消除内扩散影响的催化剂粒径范围。
For carbon materials for molten silicon silicification corrosion found that silicon elements on carbon material corrosion is mainly through the carbon material surface open pore and defect to material internal diffusion. 对炭素材料进行熔融硅的硅化腐蚀发现,硅元素对炭素材料的腐蚀主要是通过炭素材料表面开气孔和缺陷向材料内部扩散。
The high activation energy indicates that the process is controlled by the internal diffusion of solid. 高的活化能数值表明,浸出过程属固体内部扩散控制。
After surface adsorption reached saturation, began to appear on internal diffusion. 在表面吸附达到饱和后,开始出现内部扩散。
According to the relationships between Cu 、 Ni leaching rate and time, kinetics model corresponds with the internal diffusion. 根据镍、铜浸出率与时间的关系,通过拟合计算得出了浸出过程的动力学方程,结果符合内扩散控制模型。
The adsorption curves of two components toluene and xylene show the toluene and xylene adsorption on water-resistant silica gel gets weakened at the same time, the internal diffusion of xylene in the silica gel particle is more difficult. 耐水硅胶材料吸附甲苯和对二甲苯二组分实验结果表明:两者的吸附作用同时减弱,对二甲苯在颗粒内部扩散更为困难。
Leaching ammonium perchlorate from composite propellants is internal diffusion process that controlled by diffusion of water and ammonium perchlorate in propellants. The AP with impurities were purified by crystallization. 从复合固体推进剂中浸取AP是以推进剂内部水和AP扩散为主的内扩散控制过程。
EIS analyzing showed that SEI film formed on the surface of needle coke was thin and dense, and the internal diffusion resistance of lithium ion in negative electrode is small, so needle coke has a good electrochemical transitivity. 交流阻抗谱分析表明,针状焦表面形成的SEI膜薄而致密,锂离子在针状焦负极的扩散内阻小,具有良好的电化学传递性。
2) Oxidation process of vanadium slag can be described by the unreacted shrinking core model and is controlled by internal diffusion. The apparent activation energy is 126.6kJ/mol in the initial stage ( 0-10min). 2)钒渣的氧化过程可以用未反应收缩核模型来描述,在氧化过程中受内扩散控制,初始阶段(0-10min)反应的表观活化能为126.6kJ/mol。