查询词典 catalyst

The components of the catalyst are sulfurated more completely with a longer reaction time. But the catalyst congregates into a large volume ball with a low BET surface area after a certain reaction. So the best range of reaction time is from 60 to 90 minutes.

研究发现，虽然硫化时间的延长可提高催化剂中金属组分的硫化物含量，但超过一定反应时间可导致硫化物过度结晶聚集，颗粒度增大，比表面下降，较佳的反应时间为60～90 min。

Compared with the conventional catalyst, the complex catalyst improved methanol anodic oxidation activity by 46 percent. The reason that it deceases the activation energy for the methanol and its ramification electro-oxidation reaction was estimated to be its special complex Keggin structure.

测试表明该添加剂降低了甲醇及其电氧化中间产物转化的活化能，改善了电极内部的质子传输状况，对甲醇的电化学氧化过程具有明显的促进作用，该复合催化剂与常规的Pt-Ru/C催化剂相比，甲醇的阳极氧化电流提高了46%。

Used the impregnation method respectively to prepare integral honeycomb ceramics catalyst taking Ce0.8Zr0.15La0.05O δ, Ce0.8Zr0.2O2 as the coating and Pd as the active constituent,Inspected the different temperature roasting two kind of overall catalyst toluene catalytic combustion performance, through powder diffracts,Raman spectroscopy, surface area, the temperature program returns (H2-TPR) and so on the characterization results associated with the catalytic activity results.

求助翻译一段话！能部分翻译也有金币！采用浸渍法分别制备了以Ce0.8Zr0.15La0.05Oδ、Ce0.8Zr0.2O2为涂层、Pd为活性组分的整体式蜂窝陶瓷催化剂，考察不同温度焙烧的两类整体催化剂甲苯催化燃烧性能，通过粉末衍射、拉曼光谱、比表面积、程序升温还原（H2-TPR）等表征结果与催化活性进行关联。

The effects of the ratio of reactants, quantity of catalyst, reaction time, reaction temperature and entraining agent of water on the product yield were investigated and the reuse of catalyst was studied. The product was confirmed by GC and IR.

探讨了酸醇物质的量比、催化剂用量、反应时间、反应温度、带水剂等对反应的影响，并对催化剂进行了重复利用研究，产品经气相色谱和红外光谱分析。

Heterogeneous Salen-Mn catalyst was prepared by chemical linkage and sol-gel entrapping method. The catalyst and its precursor were characterized by means of FT-IR, UV-vis and 1H NMR.

采用化学键联和溶胶－凝胶相结合的方法制备锚链固定的多相化Salen-Mn催化剂，利用FT-IR，UV-vis，1H NMR等方法对催化剂及其前体进行表征。

In an embodiment, disclosed is a catalyst for selectively hydrogenating a highly unsaturated hydrocarbon to an unsaturated hydrocarbon comprising a chlorided inorganic catalyst support, palladium, and silver.

在实施方案中，公开了用于将高度不饱和烃选择性加氢成不饱和烃的催化剂，其包含氯化的无机催化剂载体、钯和银。

The exploratory study on the application of MSB reactor with fine particles of Ni based amorphous alloy as catalyst in the process of purification of caprolactam indicated that the hydrogenating efficiency of MSB reactor process was increased 3-5 times, the catalyst consumption was reduced by 50%, and the reactor volume could be reduced, as comp...

以细颗粒镍系非晶态合金为催化剂的磁稳定床反应器用于己内酰胺加氢精制的试验研究表明，与现有釜式工艺相比，加氢效率可提高 3～ 5倍，催化剂耗量降低 50 %，并且可缩小反应器体积。

In this paper, the method of growing carbon nanotubes bycatalytic decomposition of 〓 in low temperature on apowder Ni-Mg-O catalyst system is used. By controlling thereaction conditions and catalyst precursor, we preparedifferent configuration of carbon nanotubes and discuss themechanism of carbon nanotubes growth, we firstly researchthe character of lithium ion intercalating carbon nantubes,and reach some important conclusions.

本文主要采用了甲烷在镍基催化剂上的低温裂解，控制不同的条件和催化剂前驱体，制备出各种不同形态参数的碳纳米管，讨论了碳纳米管的生长机理；并且首次研究了各种不同形态参数的碳纳米管的嵌锂性能，取得了一些有意义的结论：一。

Traditional method is the fundamental method of V - P - O catalyst preparation; Aerosol Precessing is a method of fast catalyst preparation; Flame Deposition Technique is one of method of preparing nanostructured Vanadium phosphorus Oxide.

但不同的制备方法对催化剂晶粒大小、晶型、比表面和耐磨程度影响较大。在v—P～O催化剂的研制过程中，人们对V—P—O催化剂的不同制备方法也进行了研究，以期合成反应性能更好的催化剂。

The XPS results show that the amount of low valence molybdenum and S(superscript 2-) increases with increase of the content of K in sulfured catalyst, and(superscript 2-) is suppressed. It is found that keeping the ratio Mo(superscript 4++Mo(superscript 5+)/Mo(superscript 6+) at 0.8~1 level and remaining more S(superscript 2-) species on the catalyst are in favor of the improvement of the catalytic activity at low temperature.

XPS表征显示，硫化态催化剂随着钾添加量的增加，低价态钼和S(上标 2-)增加，(上标 2-)受抑制，Mo(上标 4++Mo(上标 5+)/Mo(上标 6+)质量比为0.8~1和较多的S(上标 2-)物种有利于提高催化剂的低温活性。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐