查询词典 catalyst

The maximal reaction rate of pyrotechnical reagent with potassium nitrate added with CuO by mixing method is 7.38 min-1, which is 1.30 times of that without catalyst. The time to maximal rate is 53.55 min, which is lower than that without catalyst by 66.3%.

氧化铜对含硝酸钾的烟火药剂具有催化作用，混合法添加的催化效果最佳；此药剂最大反应速率为7.38 min-1，是不含催化剂药剂的1.30倍；到达最大反应速率时间为53.55 min，比不含催化剂的药剂降低了66.3%。

The maximal reaction rate of pyrotechnical reagent with potassium perchlorate added with Fe2O3 by crystallization method is 8.10 min-1, which is 4.09 times of that without catalyst. The time to maximal rate is 8.52 min, which is lower than that without catalyst by 92.8%. It was also found that CuO can catalyze pyrotechnical reagent with potassium nitrate, and the addition is better with mixing method.

结果表明，氧化铁对含高氯酸钾的烟火药剂具有催化作用，以结晶添加法催化效果最佳；此药剂的最大反应速率为8.10 min-1，是不含催化剂药剂的4.09倍；到达最大反应速率时间为8.52 min，比不含催化剂的药剂降低了92.8%。

The influences of conditions, such as the different elements in A site, reaction temperature and the reoxidation time etc.on partial catalytic oxidation of AFeO 3 catalyst are reviewed. The results show that the lattice oxygen from AFeO 3 pervoskite catalyst in A site occupied ...

结果表明，稀土金属(La ，Nd ，Sm ，Eu)占据A位的AFeO3钙钛矿型催化剂中的晶格氧适于甲烷选择性氧化制合成气，在完全氧化的LaFeO3催化剂上存在少量的强氧化性氧物种，通过控制再氧化条件，可使CH4 在LaFeO3催化剂的作用下，高转化率(～ 92 %)、高选择性(96 %)地生成合成气。

Catalysis of thecomplex mental oxides can be greatly effected by it's redox property. In the present work, a significant study on the oxidation performance and re-oxidationperformance of Mo-V-Te-Nb-O catalyst was carried out using a pulse reactor in which theoxidation of propane and the reoxidation of catalyst were taken place alternatively.

我们利用脉冲反应器，催化剂预氧化与丙烷氧化反应轮流进行，重点考察了反应条件下Mo-V-Te-Nb-O催化剂氧化丙烷的性能及其再氧化性能，并对催化剂的结构进行了表征。

NO+NH3 temperature-programmed reaction runs over reduced catalyst samples pretreated with various oxidizing species showed that both NO2 and HNO3 were able to reoxidize the V catalyst at much lower temperature than gaseous O2: furthermore, they significantly enhanced the NO + NH3 reactivity below 250 C via the buildup of adsorbed nitrates, which act as a surface pool of oxidizing agents but are decomposed above that temperature.

不+NH3 温度-规划反应奔跑结束减少催化剂样品预先处理与各种不同的氧种表示两者的没有 2 和 HNO3 能够到再氧化 V 催化剂在非常低的温度超过气体的 O2：此外，他们重要地可提高的那不+ NH3 反应度在下面 250？C 经由组织吸附硝酸盐，哪一个行为当做一表面池氧代理人但是被分解上方哪一温度。

The appearance of the synthetic microspherical catalyst containing the SAPO molecular sieves is complete, the synthetic microspherical catalyst has a multi-level pore structure, and can be used for the reaction of producing alkene by converting an oxygen compound.

合成的含SAPO分子筛的微球催化剂形貌完整，且具有多级孔道结构，可以用于含氧化合物转化制烯烃反应。

However, the research works on the mechanical strength of the catalyst in macro scopic viewpoints are carried out comparatively deep, but the understanding about in elemental rules of mechanical strength during forming process of catalyst are not sufficient.

然而，从宏观角度考察催化剂机械性能的研究相对比较深入，而对成型过程中的催化剂强度性质自身规律的研究还不够深入。

The results show high selectivity when the temperature is controlled at 50 CC , and the nitrated reaction time is 90 mm, toluene is nitrated by using 95% nitric acid as nitrating reagent at the presence of acetic anhydride, 1.0g silicotungstic acid catalyst is calcinated at 300℃ for 1.5h. The o/p (ratio of ortho to paro isomer of toluene nitration) ratio is 0.89 in product distribution of toluene nitration, lower than 1.67 using sulfonitric acid as catalyst. The yield of products is 91.6%.

结果表明，在醋酐存在条件下，以CCl4为溶剂，以质量分数为95%的硝酸为硝化剂，反应温度控制在50℃，反应60 min， 1.0g经300℃焙烧1.5h后的硅钨酸催化剂，对甲苯表现出强的区城选择性，甲苯硝化产物o/p值（甲苯硝化产物邻位和对位异构体的质量比）达0.89，较硝硫混酸的1.67显著降低，产物收率达到91.6%。

Using silicotungstic acid as catalyst with the catalyst supported on active carbon,2-methyl-2-ethyl-acetic-1,3-oxathiolane(targeted compound I,an aroma compound with apple flavor )was synthesized by the reaction of ethyl aceto-acetate and 2-mercapto-ethanol.

以活性炭固载硅钨酸作为催化剂，用乙酰乙酸乙酯与巯基乙醇缩和合成了具有浓郁苹果香气的香料化合物2-甲基-2-乙酸乙酯基-1，3-氧硫杂环戊烷。

Stannic chloride was selected as the proper catalyst, and phosphoric acid as the co-catalyst.

采用丙烯酸亲水化改性聚砜中空纤维超滤膜。

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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