查询词典 catalysts

In this paper,a series of CO_2 adducts of N-heterocyclic carbenes are designed and synthesized.Then,they are employed in the coupling reactions of carbon dioxide with epoxides as the catalysts.And the effects of molecular structure on the catalytic activity are observed.

论文设计合成了一系列的NHC-CO_2加合物，并将其作为催化剂首次应用于催化二氧化碳与环氧化物的环加成反应，考察了这类催化剂的分子结构对催化性能的影响。

Moreover, by the research on the electrochemical performances of two cathode catalysts such as Pt and composite NiO, it is shown that (1) composite NiO is of lower over-potential and better electrochemical performance; and (2) the poor electrical conductivity of composite electrodes can be overcome by admixing Ag powder into the catalyst layer with a dosage of 10% by weight.

文中还研究了两种阴极催化剂Pt与复合NiO催化剂的电化学性能，发现复合NiO催化剂比Pt电极具有更低的过电位和更好的电化学性能；虽然复合电极的导电性比Pt差些，但是这一问题可以通过在电极中掺杂10%的Ag粉解决。

Composite NiO cathode catalysts with admixing YSZ electrolyte, Ag powder and starch wer...

在850℃和101.13kPa时，燃料电池最大输出功率密度为155mW·cm-2，对应的电流密度为240mA·cm-2。

These catalysts can exhibit desirable performance for aromatizing the olefin of FCC gasoline in fixed bed reactor without existence of hydrogen, and can be used in fluid bed reactor.

通过300小时催化剂的单程操作和23次催速再生试验，表明催化剂有良好的稳定性和再生性能。

The specific surface area of catalysts decrease with the increase of calcining temperature and the Cu content of catalyst.

催化剂的比表面积随焙烧温度的升高和催化剂负载的铜含量增加，其比表面积下降。

A series of fluorinated nanoscale HZSM-5 zeolite catalysts were prepared by calcining at different temperatures in the range of 400~550℃.

在400~550℃的不同焙烧温度下，制备了氟改性的纳米HZSM-5分子筛催化剂。

In this dissertation, some catalysts were prepared and used to convert CO2 and organic carbonates.

本论文制备了一系列新型的催化剂，用于催化CO2化学转化和其产物的下游反应。

The ways to widen pH range in Fenton process are discussed in this paper,with the advances of several methods reviewed such as using chelates,iron-like ions or solid catalysts.

本文分析了拓宽Fenton法pH范围的可能途径，综述了关于络合剂、类铁金属的离子及固体催化剂等方法的研究成果，指出了值得进一步深入研究的问题。

The ways to widen pH range in Fenton process are discussed in this paper,with the advances of several methods reviewed such as using chelates,iron-like ions or solid catalysts.

传统的 Fenton法处理废水时，须调节处理前后废水溶液的pH，制约Fenton技术的广泛应用。

The regeneration kinetics of various kinds of commercial coked zeolite cracking catalysts is investigated.

考察了各种工业用分子筛裂化催化剂的再生动力学，认为碳的燃烧可分为两个阶段：当碳含量大于0.1～0.2％时，烧碳反应对含碳量为一级反应，而当含碳量进一步降低时，反应级数由一级转为1.5级。提出了烧碳反应动力学方程。

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