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The characterization of the coked catalyst shows that the deactivation of catalysts is caused by a jam of bulkier molecules, which are the alkylbenzenes from both reactants and products, so the deactivation cannot be avoided.

苯与长链烯烃的烷基化反应过程中，β沸石催化剂的失活是由于产品直链烷基苯本身和原料中带入的杂质芳烃逐渐堵塞孔道、阻止了反应物分子接近活性中心引起的，是由晶内开始逐渐向外发展的。

The results shown that the surface was covered and the pores were blocked obviously for the coked catalysts, the specific surface area and pore volume lost greatly, pore size distribution shifted to small pore end.

结果表明，结焦催化剂表面积炭沉积和孔道堵塞现象严重，比表面积和孔容大量损失，孔分布向小孔范围迁移，催化剂孔径越小，损失越严重。

The influence of nanocrystalline particles and catalysts on the hydriding and dehydrogenating properties of magnesium-based hydrogen storage materials are summarized in this paper.

总结了纳米晶、催化剂改性等对镁基储氢材料吸放氢性能的影响，介绍了不同镁基储氢复合材料的吸放氢性能以及基于密度泛函理论的第一原理计算方法在镁基储氢材料吸放氢性能方面所做的一些基础理论研究，指出随着量子化学、凝聚态物理等学科以及计算机技术的发展，理论计算方法在研究镁基储氢材料吸放氢性能方面的作用将越来越重要。

Fig.2 XRD patterns of catalysts by different chemical deoxidizing ...

图2 不同化学还原方法制备出催化剂的XRD表征结果。

The lignite samples loaded with K, Ca, Ni and Fe were devolatilized in a fixed-bed reactor to prepare the corresponding chars which were measured by nitrogen adsorption to obtain the parameters of pore structure, and the effects of catalysts on the pore structure change and steam gasification reactivity were analyzed.

在固定床反应器中对添加了碱金属K、碱土金属Ca、过渡金属Ni和Fe的褐煤进行制焦，采用N2等温吸附法测量各煤焦孔隙结构的表征参数，从而研究催化剂对煤焦的孔隙结构和气化反应性的影响。

Along with the modernization, however, some American rural communities lag behind the urban. In the mid 1990s, aiming at the draggling status of American rural communities, the Ford Foundation launched Rural Community College Initiative. In RCCI, rural community and tribal colleges are ideally positioned to become catalysts for regional development.

随着美国现代化进程不断加快，一些农村社区出现了发展滞后的问题。20世纪90年代中期，福特基金会发起了农村社区学院创新计划，旨在通过援助农村社区学院来促进当地农村社区的发展。

Pt/nanoTiO2-CNT complex catalysts were prepared by direct hydrolysis of Ti4 and electrochemical scan electrodepositing method.

通过前驱体Ti4直接水解和电化学扫描电沉积法制备在Ti基体上的纳米TiO2-碳纳米管复合膜载Pt(Pt/nanoTiO2-CNT)复合催化剂。

The existent value of Ni is corroborated, especially, the spectra of encaged PMo-Ni and the impregnated PMo-Ni catalysts show the formation of Ni~(2+), the Ni~0 signal can not observed at signals.

探讨了复合催化剂中Ni的存在状态，由于PMo强的氧化能力，原位法和浸渍法制备的复合催化剂中Ni未被还原为Ni(0)，与金属改性的NiHZSM-5催化剂不同。

Based on recent work about solid acids, some research was done. A series of novel magnetic nano size solid acid catalysts were prepared by enwrapping the magnetic core of Fe_3O_4 with solid acid or solid superacid.

本文在总结近年来固体酸催化研究工作的基础上，继续拓宽其研究领域，将磁性和固体酸进行组装，制备出一系列不同类型的磁性纳米固体酸催化剂。

Especially, chiral metal complexes and organo-catalysts in combination with electrophilic fluorinating reagents have found applications to the synthesis of a variety of chiral fluoroorganic compounds.

特别是，手性金属配合物和有机催化剂诱导的不对称催化氟化反应被广泛应用于各类手性氟化物的合成，已成为不对称氟化反应研究的热点。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。