查询词典 catalysts

Most hydroprocessing catalysts are commercially manufactured with the active metals in an oxidic state.

大多数加氢处理催化剂都是商业生产的、活性金属在其氧化态。

The main contents are as follows: A series of MCM-41-supported nickel phosphide catalysts with initial Ni/P atomic ratio of 0.5 - 2 and loading level of 10 - 40 wt % in the oxidic precursors were prepared by an in-situ reduction method. Their catalytic performances were evaluated in the HDN of quinoline.

论文内容主要包括：用原位还原的方法制备了MCM-41负载的磷化镍催化剂，考察了不同Ni／P摩尔比和负载量对催化剂结构和喹啉HDN反应活性的影响。

Some aggregates of the active elements appeared on the oxidic catalyst samples and the aggregates could be re-dispersed by sulfidation. The reduction and sulfidation ability of the regeneration catalysts were increased in low temperature region.

对催化剂氧化态和硫化态的表征结果表明，催化剂在失活—再生过程中，比表面等物理性质有一定的变化，再生催化剂活性组分发生聚集，该聚集体经硫化后可得到重新分散，催化剂的低温还原性和硫化性能增强。

Study on the preparation of γ-alumina-supported molybdenum phosphide hydrofining catalysts;2. Silica-supported molybdenum phosphide s were prepared in a fixed bed reactor by an in situ reduction method from their oxidic precursors.

以SiO2为载体，用钼酸铵和磷酸氢二铵作钼源和磷源，采用共浸渍法制备了负载型磷化钼氧化态前体；在固定床反应器上，用H2原位还原制备了MoP/SiO2催化剂。

A series of hydroformylation catalysts were prepared by supporting Rhodium complex in the supporters modified by phosphotungstic acid.

将铑络合物担载于磷钨酸改性的载体上制备了一系列新型催化剂。

The results showed that phosphotungstic acid -, PW12/C and PW12/SiO2 were eminent catalysts and had no pollution.

实验结果显示：磷钨杂多酸、PW_(12)/C和PW_(12)/SiO_2是优良的酯化催化剂，对环境无污染。

In order to investigate the catalytic performance to remove trace alkene from aromatic hydrocarbon, FTIR and XRD were used to analyze the character of catalysts with different contents of phosphotungstic acid and at different calcining temperature.

采用的催化剂以分子筛和磷钨酸为活性组分、氧化铝为载体，考察其脱除芳烃中微量烯烃的催化性能。

Phosphotungstic acid catalysts supported on ceria with various PW loadings were prepared by the impregnation method , and characterized by X- ray diffraction, acid strength and nitrogen adsorption techniques.

以CeO2为载体，用浸渍法制备了不同负载量的磷钨酸催化剂，并且考察了催化剂光催化脱色甲基橙溶液的催化性能。

The results show that the La doping inhibited the phase transformation from anatase to rutile, and improved the optical absorption and surface area of catalysts, also could effectively enhanced the photoactivity.

本论文主要研究了在水热法的基础上进行改进，通过不需要高温煅烧的路线制备了镧离子掺杂TiO_2光催化剂，并通过XRD、UV-Vis、IR、BET等表征手段详细考察了制备条件对催化剂的结构和活性的影响。

Therefore, how to improve the photocatalytic efficiency of supported catalysts has attracted wide attention.

因此，如何提高负载型催化剂光催化效率成为此项技术应用的关键。

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