查询词典 catalyst

The best catalytic activity and selectivity could be found in the prepared catalyst system with the optimum combination of the ionic liquid, nano-Pd, and support. The stabilizer is also used to prevent the aggregation of nano-Pd particles. One of the advantages of this approach is that the prereduction of catalyst is not required.

其中离子液体、奈米钯金属及担体皆有其功能，三者之组合才能达到良好之效果，同时，在合成奈米钯过程中，必须使用稳定剂以避免奈米钯金属之聚集此触媒系统之另一优点为不需先加氢还原处理，耐水性强且可重覆使用，是一种颇具潜力之选择性氢化触媒。

The psychrophilic enzymes is a kind that has high catalyst activety under the condition of low temperature and it is also a very important situation for the low-temperature catalyst to adapt to the low-temperature condition.

嗜冷酶是一类在低温条件下具有高催化活性的酶，也是低温微生物适应低温环境生存的重要条件。

The resin is prepared by swelling chlorine balls in a solvent such as nitrobenzene; adding catalyst to obtain polystyrene-divinylbenzene adsorptive resin; removing reaction mother solution; washing to remove residual solvent and catalyst; swelling; adding pyrane reagent to further react with chloromethyl residual on inner and outer surfaces of the resin to obtain the pyranyl modified adsorptive resin with the composite function.

该树脂的制备方法：将氯球溶胀于硝基苯等溶剂中，加入催化剂，得到聚苯乙烯-二乙烯苯吸附树脂；抽尽反应母液，洗去残留的溶剂和催化剂；溶胀，加入吡喃试剂与树脂内外表面残留氯甲基进一步反应，可制得吡喃基修饰复合功能吸附树脂。

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。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。