查询词典 catalyst

Industrial gas / liquid purification catalyst, adsorbent organic compounds and metals as the main research directions, with eight experienced and deep support of the Engineering and Technology, Taiyuan, Qingdao University, Beijing Nonferrous Metal Research Institute of University established a long-term Relations of cooperation, is now a sulfur-tolerant shift catalyst, at room temperature fine desulfurizer, antichlor, sulphur recovery catalyst.

以工业气体/液体净化催化剂，吸附剂及贵金属有机化合物为主要研究方向，拥有八名经验丰富，学养深厚的高工，并于太原理工大，青岛大学，北京有色金属研究院等高校建立了长久的合作关系，现已形成耐硫变换催化剂，常温精脱硫剂，脱氯剂，硫磺回收催化剂。

In this paper, oligomerization catalyst was prepared by impregnation and the performance of Fe-Ni catalyst was studied for mixed butene oligomerization.The effect of preparation conditions, reaction conditions and molding methods of powder catalyst was separately studied on the performance of mixed-butene oligomerization.

本文采用浸渍法制备了齐聚催化剂，考察了负载型Fe-Ni催化剂在催化混合丁烯齐聚反应中的性能，研究了催化剂的制备条件、反应条件和成型等对混合丁烯齐聚性能的影响。

High-performance rare earth oxygen storage material ceria is the key material of automotive exhaust gas purification catalyst. It determines the performance and life time of the catalyst and has become the focus of competition of all countries in the field of automotive exhaust gas purification catalyst.

高性能稀土储氧材料CeO2是汽车尾气净化催化剂的关键材料，决定着催化剂的性能和寿命，是各国在汽车尾气净化催化剂领域竞争的焦点。

It was found that the MCM-22 zeolite catalyst prepared by the VPT method not only showed good crystallinity and high BET surface area, but also better crystal growth orientation and denser structure.The catalyst showed high activity, selectivity and good stability for alkylation of benzene with propylene, especially better selectivity to the end product cumene.The shaped MCM-22 zeolite catalyst prepared by the VPT method has good prospect of industrial application in synthesis of cumene.

结果表明：汽相法制备的MCM-22分子筛催化剂不仅具有较好的结晶度和较高的微孔表面积，而且具有更好的晶体生长取向性和更加致密的结构；在烷基化反应中也具有很好的活性、选择性和稳定性，特别是对目的产物异丙苯的选择性明显高于水热法合成的催化剂，在异丙苯合成上具有很好的应用前景。

A process for preparing cycloolefin features that in the presence of catalyst slurry containing metal Ru catalyst, water and metallic sulfate, the mononuclear aromatics is partially hydrogenated by hydrogen, and includes a step to control the activity of catalyst.

一种生产环烯烃的方法，该方法是在含有金属钌催化剂、水和金属硫酸盐的催化剂浆液存在下用氢部分加氢单环芳烃进行该方法，其中包括控制催化剂活性的步骤。

Vapor makes the activity and selectivity of the catalyst decrease a great deal yet this disvalue is reversible; When the elemental sulfur and vapor exist simultaneity in the system, it might generate H〓S and S on 〓 catalyst since the anti-Claus reaction, but this phenomena is not observed on CoS〓-TiO〓 catalyst showing that sulfides could check the anti-Claus reaction.

对硫化物催化剂CoS〓-TiO〓来说，助剂La和Ce的引入对CoS〓-TiO〓催化剂的氧化还原性能有一定影响，硫化物催化剂平均粒径要小，但助剂并未改变催化剂的电子结构，对于氨分解克劳斯反应的活性改变不大明显。

A series homopolyme of ethylene synthesised by metallocene catalyst was analyzed by the high temperature gelatin permeation chromatography. The results showed that the molecular weight distribution changed not too much when the ratio of Al/Ti ranging between 1000 and 4000, while the molecular weight distributed increased from 2.48 to 2.81 when the ratio ranging between 4000 and 7000; catalyst D had the lowest activity to be used as asymmetric metallocene catalyst; the curve of molecular weight moved much to the left with the increases of temperature and two active centres appeared when the temperature is 70℃.

通过高温凝胶渗透色谱对茂金属催化合成的一系列乙烯均聚物进行了分析，可以看出Al/Ti比从1000变到4000时，分子量分布曲线图变化不大，而从4000变到7000时，变化相当大，分布宽度从2.48增至2.81；催化剂D的活性最小，可作为非对称性茂系金属催化剂；该聚合体系分子量的大小受聚合温度的影响很明显，随温度的升高，分子量分布曲线图向左发生很大位移，在聚合温度为70℃时存在两个活性相当的活性中心。

Based on KT-01 nickel catalyst, the scientific research personnel of our company and the expert group of the former subject group from Lanzhou University made joint efforts to tackle the key problems and successfully developed the 2nd generation of KT-02 supported nickel catalyst through in-depth study on the technical formula, catalytic activity and other mechanisms and taking modified carrier, the properties of acid and alkali, the degree of decentralization of active ingredients on the carrier surface, and fundamental breakthrough has been achieved on the aspects of catalytic activity, specific surface area, bulk density, etc, and the technical defects of KT-01 nickel catalyst are completely overcome; the catalytic activity becomes higher, the starting temperature becomes lower, the industrial serviceability temperature is lowered and the yield increased.

在KT-01型镍催化剂的基础上，我公司科研人员与兰州大学原课题组专家联合攻关，通过对工艺配方及催化活性等机理的深入研究，从载体改性、酸碱性、活性组分在载体表面的分散程度等方面入手，成功开发出第二代KT-02负载型镍催化剂系列产品，在催化活性、比表面积和堆密度等方面都有根本性突破，彻底克服了KT-01型镍催化剂的技术缺陷，使催化活性更高、启动温度更低，降低了工业使用温度，提高了生产收率。

On the NiO/SiO〓 catalyst prepared by IM, the main hydrogenation product of MA was SA, the activity and selectivity were almost no relation with the nickel content and nickel species 3. Summarizing the characterization and activity evaluation of the catalysts, we concluded: On nickel based catalyst, when NiO was crystallite, and the Ni〓 that was prepared by reducing, hydrogenation of the MA could lead to SA but not to γ-BL; when NiO was cluster and had a properly interaction with the support, the Ni〓 prepared by reducing, could hydrogenate MA to SA then to γ-BL. When NiO cluster and crystallite were both existed on the catalyst, the hydrogenation products were mixture of SA and γ-BL, and the amounts of SA and γ-BL were related with the ratio of cluster and crystallite.

综合催化剂的表征和活性评价得出：当镍基催化剂上氧化镍以结晶态存在，经氢还原后的零价镍可使顺丁烯二酸酐加氢得到丁二酸酐，丁二酸酐难以进一步加氢为γ-丁内酯；当镍基催化剂上氧化镍以簇团形式存在，与载体之间有适当的相互作用时，经氢还原后的零价镍可使顺丁烯二酸酐加氢得到的丁二酸酐进一步加氢为γ-丁内酯；若催化剂上氧化镍既有结晶态又有簇团形式时，随二者含量比例不同而得到丁二酸酐和γ-丁内酯的混合物。

The experimental results indicate that methanol synthesis gas can be produced by steam gasification of lauan sawdust at 680℃ without catalyst addition. However, in the presence of steam reforming catalyst (RKNR+RKS-1), weight ratio of catalyst to dry wood sawdust =1, methanol synthesis gas can be produced at 580℃.

实验结果显示：未加触媒时，本屑在680℃气化所产生的气体可用於甲醇的合成；而使用蒸气重组触媒(RKNR+RKS-1)，在580℃、触媒与全乾木屑的重量比为1时，所产生的气体即可用於甲醇的合成。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。