查询词典 catalyst

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。

Producted RF and CRF aerogels by process of sol-gel technics, dynamic-exchange, CO2 supercritical drying, and procedural increase in temperature carbonization methods, which have eximious capability and nanometer network structure; Systemic analysis various factors which effect gel course, such as ratio of reactants and the dosage of catalyst, and probed into the better experiments conditions(the concentration of resorcinol and formaldehyde is more than 2% and the value of R/C is between 50 and 300); During gel course , primary investigated the viscosity curve and particle size distribution of sol-solution, and analyzed the reason of catalyst dosage effects particle size of gel, and confirmed that the up-growth of gel follows the theory of " polymerize increase ".The experiment results indicated that ultrasonic with unvarying temperature disposal shortened gel time and optimized quality of gels, and the factors of ultrasonic effect gel reaction velocity were analyzed; Prepared organic aerogels using compounds of resorcin and hydroquinone substitute resorcinol reacts with formaldehyde the first time, and also optimized the proportion of resorcinol and hydroquinone (the proportion of hydroquinone in 10%～40%).

采用溶胶-凝胶工艺结合动态溶剂交换、CO2超临界流体干燥与程序升温碳化方法制备出性能优良、具有纳米网络结构的RF与CRF气凝胶；深入研究了反应物配比催化剂用量等条件对凝胶过程的影响，得到了较佳的RF凝胶制备条件(RF浓度应大于2%，R/C值取50～300)；初步研究了凝胶过程中的粘度、粒径变化情况，分析了催化剂用量影响凝胶中粒子尺度的原因，在实验上印证了凝胶生长遵循"聚增长"的理论；通过引入超声波改进了RF气凝胶的制备工艺，缩短了凝胶反应时间，提高了凝胶品质，并探讨了超声波促进RF凝胶反应作用的原因；首次用对苯二酚与间苯二酚复配制备了混合有机气凝胶，优化出复配比(对苯二酚含量为10%～40%)。2。

A solid acid catalyst of outstanding performances has been produced with this technology utilizing amylose, glucose and saccharose abounding in the nature through simple burning and sulfonation processes. This catalyst is insoluble in water, ethanol, methanol, plant oil and biodiesel.

本技术利用自然界大量存在的多糖、葡萄糖和蔗糖等经过简单的灼烧磺化制备出性能突出的固体酸催化剂，该催化剂不溶于水、乙醇、甲醇、植物油脂和生物柴油。

New production technology of a solid acid catalyst for biodiesel production A solid acid catalyst of outstanding performances has been produced with this technology utilizing amylose , glucose and saccharose abounding in the nature through simple burning and sulfonation processes .

新型生物柴油生产用固体酸催化剂生产技术本技术利用自然界大量存在的多糖，葡萄糖和蔗糖等经过简单的灼烧磺化制备出性能突出的固体酸催化剂，该催化剂不溶于水，乙醇，甲醇，植物油脂和生物柴油。

There had been a moment during the breakfast meeting, though, after the backslapping and the small talk and when all of us were seated, with Vice President Cheney eating his eggs Benedict impassively and Karl Rove at the far end of the table discreetly checking his BlackBerry, that I witnessed a different side of the man.

那次早餐会期间，在表示过关心和寒暄以后，我们所有人坐了下来，我注意观察了一下，副总统切尼面无表情地吃着班尼迪克蛋（Eggs benedict，源自美国，以英式松饼、火腿、水煮蛋以及荷兰酱组合而成），卡尔。罗夫在餐桌的远端谨慎地经常查看他的黑莓手机，我目睹了他所不为人知的一面。

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