查询词典 catalyst

The experimental results indicated that these metal oxide catalysts had better catalytic activities to the methylene chloride gas at low concentration, and the catalytic activities increased with the increase of temperature,but decreased with the increase of inlet gas concentration. The CrO3/potsherd catalytic activity was better than V2O5/potsherd, and the CrO3/potsherd catalyst displayed higher activity at the relative low temperature. When the reaction temperature was 320 ℃, the conversion rate could reach 99%, and the result of 100h catalyst stability experiment show that the catalytic activities have good stability.

实验结果表明此类金属氧化物催化剂对低浓度CH2Cl2气体有较好的催化活性，催化剂的活性随温度升高而升高，随入口废气浓度增大而降低，其中CrO3/陶瓷片催化剂的催化活性比V2O5/陶瓷片催化剂的活性好，CrO3/陶瓷片催化剂在较低温度下就表现出较高反应活性，在反应温度320℃时，转化率即达到99%，同时催化剂100h稳定性实验结果表明催化剂活性有很好稳定性，为进一步工业化应用提供理论和实践依据。

Pillared montmorillonite, as a representative of Sandwich like pillared interlayered clays ,caught many scientist"s attention not only because of its special structure of two-dimensional sheets but also its excellent activity of catalysis and adsorption. It is well documented that the method to prepare PILM, ion-exchanging, needed a long periods and was affected by many factors, and that the product had low thermal stability especially hydro-thermal stability which was the primary obstruction of its using in large-scale production. At the same time, PILM was well documented prepared with Na-montmorillonite, while there were a few documents about PILM prepared with Ca-montmorillonite. The large cost of remodel of Ca-montmorillonite to Na-montmorillonite was another obstacle of the application of PILM, while Ca-montmorillonite was widely distributed in nature, as a result, to prepare PILM with Ca-montmorillonite has practical significance. What"s more, PILM was mainly studied as a catalyst in oil refining process till now, but rarely documented in other catalysis reactions, especially in coal liquification filed which also needed high activity catalyst.

以柱撑蒙脱石为代表的具有"三明治"结构的柱撑粘土矿物因其特殊的二维孔道结构和优良的催化和吸附性能近年来成为国内外广泛关注和研究的热点，但是目前国内外大量报道的PILM制备大多采用离子交换法，生产周期很长，影响因素很多，并且产物热稳定性不够高，特别是水热稳定性较差，这是其不能在实际中大规模生产和应用的主要障碍，因此制备一种高稳定性的PILM意义非常；文献中大量报道的都是钠基蒙脱石合成的柱撑粘土矿物，传统的离子交换法必须将钙基蒙脱石钠化改型，其成本相当高，而自然界中大量存在的却是钙基蒙脱石，直接用钙基蒙脱石合成柱撑粘土矿物有很现实的意义，但目前这方面的报道却很少见；另外，迄今为止，PILM作为催化剂的研究领域主要在石油的炼制中应用，而在煤炭的液化中却鲜有报道，如果能在煤炭转化领域应用这一成果，其影响也将是相当大的。

Pillared montmorillonite, as a representative of Sandwich like pillared interlayered clays ,caught many scientist's attention not only because of its special structure of two-dimensional sheets but also its excellent activity of catalysis and adsorption. It is well documented that the method to prepare PILM, ion-exchanging, needed a long periods and was affected by many factors, and that the product had low thermal stability especially hydro-thermal stability which was the primary obstruction of its using in large-scale production. At the same time, PILM was well documented prepared with Na-montmorillonite, while there were a few documents about PILM prepared with Ca-montmorillonite. The large cost of remodel of Ca-montmorillonite to Na-montmorillonite was another obstacle of the application of PILM, while Ca-montmorillonite was widely distributed in nature, as a result, to prepare PILM with Ca-montmorillonite has practical significance. What's more, PILM was mainly studied as a catalyst in oil refinin g process till now, but rarely documented in other catalysis reactions, especially in coal liquification filed which also needed high activity catalyst.

以柱撑蒙脱石为代表的具有"三明治"结构的柱撑粘土矿物因其特殊的二维孔道结构和优良的催化和吸附性能近年来成为国内外广泛关注和研究的热点，但是目前国内外大量报道的PILM制备大多采用离子交换法，生产周期很长，影响因素很多，并且产物热稳定性不够高，特别是水热稳定性较差，这是其不能在实际中大规模生产和应用的主要障碍，因此制备一种高稳定性的PILM意义非常；文献中大量报道的都是钠基蒙脱石合成的柱撑粘土矿物，传统的离子交换法必须将钙基蒙脱石钠化改型，其成本相当高，而自然界中大量存在的却是钙基蒙脱石，直接用钙基蒙脱石合成柱撑粘土矿物有很现实的意义，但目前这方面的报道却很少见；另外，迄今为止，PILM作为催化剂的研究领域主要在石油的炼制中应用，而在煤炭的液化中却鲜有报道，如果能在煤炭转化领域应用这一成果，其影响也将是相当大的。

The dependence of amount of adsorption of propanol over the catalyst on the residence time has been investigated by the pulse method. Oscillatory phenomena of deep oxidation of propanol on Pt/Al2O3 catalyst has been observed in experiments

用脉冲法研究了丙醇在催化剂上吸附量与停留时间的关系，实验结果服从式(5)经验规律，当反应条件强化时观察到在Pt/Al2O3催化剂上丙醇深度氧化的振荡现象。

Synthesis of pyruvic acid from lactic acid by catalytic oxidation with oxygen was studied. The effect of catalyst composition, amount of catalyst and oxygen, reaction temperature and time on product yield was investigated and the optimum conditions were found.

由于丙酮酸的分子中同时具有羰基和羧基两个官能团，因而反应中心多而显出比一般化合物更为重要和特殊的化学性质，已引起越来越多的化学工作者的重视。

In this study, SiC as a carrier, Pt reactive component, Prepared by impregnating a series of Pt/SiC catalyst and influence of temperature, space velocity, Pt loading and auxiliaries Pt/SiC catalyst for the activity.

本研究以碳化硅为载体，Pt为活性组分，通过浸渍法制备了一系列的Pt/SiC催化剂，并考察了焙烧温度、空速、Pt负载量以及助剂对Pt/SiC催化剂的活性的影响。

Therefore, increasing metallic Co dispersion and catalyst reducibility provide the effective way to improve Co utilization efficiency and decrease catalyst cost.

因此，提高金属钴的分散度和催化剂的还原度是提高金属钴的原子利用率、降低催化剂成本的一条有效途径。

A dynamic catalyst coking model and multi-variant linear regression model are used to estimate the parameters of catalyst coking model.

提出了采用动态结焦模型以及新鲜催化剂结焦速率的线性回归模型来估计结焦模型参数的方法。

Molecular sieves are very important catalyst because it possess regular pore shape and high surface area, which have been widely used in many chemical processing as a catalyst or support, especially in petrochemical process.

分子筛由于具有规整的孔道结构和高比表面积而在很多化工过程中被用作为吸附剂和催化剂或催化剂载体，特别是在石油化工过程中。

The recycle times and reproductive capability of catalyst, reaction temperature, reaction time, amount of catalyst, molar ratio of mixture have been investigated.

强酸性阳离子交换树脂催化制备醋酸正丙酯适宜的条件为：反应时间为2h，催化剂用量为15%，沸腾状态反应，酸醇摩尔比为1：1。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。