查询词典 catalysts

There are different content of Ni, Fe deposed on waste catalysts, which make them receive inequivalent force in magnetic field, catalysts with high content are selected from non- or lower magnetic active mass.

该磁分离方法主要是利用镍、铁等重金属元素在催化剂上沉积量的不同导致它们在磁场中所受的磁力大小不同，可从非磁性或弱磁性催化剂颗粒中选出吸附了较多金属的磁性催化剂颗粒。

Supported solid bases and metal oxide catalysts were prepared successfully by isochoric impregnation and the co-precipitation method, and were used for synthesis of biodiesel from transesterification of rapeseed oil and methanol. The high active solid base catalysts: KF/Al2O3, ZnO/La2O3 and La2O3 were found in this paper.

本文用等体积浸渍法和共沉淀法制备了负载型和金属氧化物型固体碱催化剂，并应用于催化菜籽油与甲醇酯交换合成生物柴油的反应，筛选出了高活性的KF/Al2O3，ZnO/La2O3和La2O3三种固体碱催化剂。

Mg-Al oxide catalysts were prepared by co-precipitation method, used ammonia as the precipitating agent. The catalytic performances of these materials were investigated in the gas-phase Aldol condensation of acetone to isophorone. The structure and surface properties of the catalysts were characterized by means of XRD, XPS, ICP, TG-DTA and TPD.

采用共沉淀法，以氨水为沉淀剂制备了一系列具有不同Mg/Al摩尔比的镁铝氧化物催化剂，考察了它们在丙酮气相缩合反应中的催化性能，并通过XRD，XPS，ICP，TG-DTA和TPD等手段对催化剂的结构和性质进行了表征。

The catalysts of the invention is able to catalyse metathetic degradation of nitrile rubbers with a higher activity than the metathesis catalysts available at present and thus makes possible an increase in the reaction rate and the setting of lower molecular weights of the degraded nitrile rubbers at a comparable noble metal content.

本发明的催化剂能够以比目前可获得的复分解催化剂更高的活性来催化丁腈橡胶的复分解降解，由此在可比较的贵金属含量下使之有可能增加反应速率并设定降解的丁腈橡胶的较低分子量。

Surface complex supports VSiO, which have good engineering character, and supported Pd/VSiO and Cu/VsiO catalysts have been prepared by surface chemical reaction modification and isovolume impregnation method, respectively. BET, TPR, chemisorption-IR chemisorption-TPD and microreaction techniques have been used to study the adsorption activation and partial oxidation reactivity of CO〓 and C〓H〓 on the Pd/VSiO and Cu/VSiO catalysts.

以表面化学反应改性法制备了工程性质优良的VSiO表面复合物载体，并以等体积浸渍法制备了负载型的Pd/VSiO和Cu/VSiO催化剂；采用BET、TPR、化学吸附—IR、化学吸附—TPD和微反技术研究了Pd/VSiO和Cu/VSiO催化剂对CO〓和乙烷的吸附活化和部分氧化反应性能。

A series of Pd/α-Al2O3 catalysts for CO coupling reaction were prepared with α-Al2O3 made from different methods. The effect of pore-foaming agent and peptizer on the support and the effect of alumina pore structure on the dispersion and activity of catalysts were studied.

考察了不同制备方法得到的α-Al2O3载体对CO催化偶联制草酸二甲酯反应的影响，研究了致孔剂和胶溶剂对载体的影响以及氧化铝孔结构对催化剂分散度和活性的影响。

Here, the selective catalytic reduction of NO with propene has been studied over various catalysts. The goal of this work is to get some effective catalysts for the removal of NO.

本论文主要通过各种方法制备了多种催化剂体系，进行了氧存在下丙烯催化还原NO反应的研究，目的是筛选出活性较高的消除NO催化剂。

The structures of various SAPO and their suitable catalytic reaction systems were described in this paper.The application possibilities of SAPO as catalysts in the conversion of methanol to light olefins or supports of catalysts for the automotive exhaust control were also prospected.

在此论述了SAPO的结构类型及适用的催化反应体系，并对它作为甲醇转化制低碳烯烃过程催化剂和汽车尾气净化催化剂载体的应用前景作了展望。

In this thesis, the reaction of methanol conversion into hydrocarbons on HZSM-5 and SAPO molecular sieves, which is of great importance to industry, is selected as probe reaction to get deeper insights into the structure of solid catalysts and the interaction of reactants with catalysts during adsorption and catalytic reaction by solid state NMR.

本论文主要以固体NMR为研究手段，以甲醇制烃类作为探针反应，详细研究了催化剂的结构、吸附过程中反应物与催化剂的相互作用、反应过程中反应物与催化剂的相互作用，主要取得了如下结果： 1 原位MAS NMR实验结果表明，甲醇制烃类的过程是通过&碳池&机理来实现，&碳池&的组成随反应的进行而变化，在反应前期，&碳池&由饱和烃类构成，随着反应的进行，饱和烃类和不饱和烃类共同组成&碳池&。

The current studies on the catalysts for n-heptane isomerization were reviewed systematically. The factors influencing the catalyst properties were discussed. The noble matel catalysts supported on SAPO HZSM-5 and Y .β zeolite were widely studied for n-heptane isomerization.

阐述了当前正庚烷异构化所用的负载型催化剂和过渡金属碳化物和氧化物催化剂的研究进展，对催化剂性能的影响因素及对策进行了分析与讨论。

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。