Many of this type of catalysts containing Pt-group metals have been discovered by far, and have high yield and catalytic selectivity.
此处介绍的是目前国外已发现的多种这类反应的以铂系金属为主的催化剂。它们大多数具有高的催化转化率和很好的选择性。
Since long-term, great efforts have been made in improving the catalytic selectivity by altering the composition and structure of catalysts and adopting the optimum catalytic reaction conditions.
长期以来，人们致力于通过调变催化剂的组成、结构和优化反应条件来改善催化氧化的选择性，但氧化选择性差的缺点一直是该类反应的难题。
The dominant reaction pathways and the effect of reaction temperature and type of zeolites on the yield and selectivity of benzene formed during catalytic cracking of cumene were investigated.
在催化裂化反应条件下，研究了异丙苯主要裂化反应路径以及反应过程中反应温度和分子筛类型对苯产率和选择性的影响规律。
The results show that such complex has good catalytic activity and selectivity for catalytic methanol carbonylation.
结果表明，该配合物催化甲醇羰基化反应具有较好的活性和选择性。
Conversion and selectivity of catalytic reactions as well as the deactivation rate of the catalyst itself is very temperature - sensitive.
催化反应的转化率和选择性以及催化剂本身的失活速率均对温度十分敏感。
The future study on catalytic hydrogenation of rosin will mainly be concentrated on the preparation of new catalysts with higher activity and selectivity to further lower pressure and temperature.
今后对松香催化加氢反应的研究主要是研制具有更高活性和选择性的新型催化剂，以进一步降低温度和压力。
Regio selectivity and catalytic effect of different palladium compounds were discussed.
探讨了不同的钯化合物的区域选择性和催化作用。
The results have shown that the series of catalysts have higher acid catalytic activation, stability and selectivity to lower fatty ester.
实验结果表明这些固体酸催化剂对于低级脂肪酸的酯化反应具有较高的酸催化活性、选择性和稳定性。
The catalytic activity declined as the selectivity of paraxylene and ortho-xylene improved with increasing treated temperature.
随着处理温度的提高，催化剂的活性降低，对二甲苯和邻二甲苯的选择性上升。
The catalytic activity and selectivity were little influenced by the loading amount in the cases of the coprecipitated catalysts.
但在共沉淀的反应中催化活性和选择性很少被反应量影响。
The poor acrolein selectivity of this catalyst was improved by continuous use in the catalytic oxidation for making the particle size of the dispersed bismuth molybdate larger.
我们还发现，在催化氧化环境中连续使用的钼酸铋粒径会越来越长，对丙烯醛的选择性会相应提高。
A high flow rate and pressure of hydrogen was in favor of the catalytic reduction of nitrate, but not benefit for the selectivity.
而对于选择性，前者提高，后者则会导致降低，即控制反应扩散性能有利于提高催化选择性。
Furthermore, the catalytic mechanisms and impact factors on the product selectivity for a same organic reaction by zeolite and ionic liquid catalysis were discussed.
此外，还进一步讨论了分子筛和离子液体在同一有机反应中的催化作用机理以及影响产物选择性的主要因素。
SAPO is a novel class of catalytic materials which exhibit excellent shape selectivity, thermal stability and hydrothermal stability, which can catalyze hydrocarbon reactions.
骨架呈负电性，具有可交换的阳离子，被广泛用作吸附剂、催化剂和催化剂载体，是一种具有优异择形选择性、热稳定性和湿热稳定性的新型催化材料。
Novel catalytic performance and selectivity from nano-size zeolites with high exterior surface area and shorter pore pathway have aroused great interest in catalysis field.
纳米分子筛因具有高的外表面积和短的孔道结构而显示了独特的催化活性和选择性，近年来已成为催化界的研究热点。
Nanometer catalyst material had peculiar crystallographic structure and surface property, thus its catalytic activity and selectivity were too much greater than these of traditional catalyst.
由于纳米材料催化剂具有独特的晶体结构及表面特性，因而其催化活性和选择性大大高于传统催化剂。
The high activity and high selectivity ang hydrogenation activity were painted out. Amorphous alloy catalysts are a kind of novel catalytic materials with broad development prospect.
指出了非晶态合金催化剂在催化中表现出优良的催化活性、高选择性和加氢性能，是一种有着广阔发展前景的新型催化材料。
Nickel-based catalysts possess high catalytic activity for ethylene oligomerization with high selectivity, easily-controlled oligomers distribution and moderate reaction conditions.
镍系催化剂具有活性高、选择性好、产品分布可调、反应条件温和等优良性能。
In this paper, the properties and mechanism of strong metal-support interaction and its effect on the activity and selectivity in the heterogeneous catalytic reaction were reviewed.
对金属-载体强相互作用的特性，产生的机理以及对多相催化反应的活性和选择性的影响进行了综述讨论。
The catalyst of activated Carbon-Supported Ruthenium can significantly catalytic hydrogenation of glycerol, and the selectivity of 1,2 - propylene glycol and ethylene glycol could reach to over 60%.
活性炭负载钌催化剂能够显著催化甘油加氢反应，产物中高附加值的1，2-丙二醇和乙二醇的选择性超过60%。
Carbon materials have high catalytic activity and selectivity to propene for ODP. Compared with activated carbon and graphite, CNF is a promising catalyst for ODP due to its structure peculiarities.
结果表明炭材料自身对于OD P过程具有较高的活性和选择性，尤其是CNF由于其独特的结构特点更适合用作odp过程催化剂。
The catalyst has high catalytic activity, good selectivity and stability, environment protection, simple preparation and lower cost.
本发明所述催化剂具有催化活性高、选择性好、稳定性良好、环境友好、制备简单、成本低的优点。
The catalytic activity and selectivity of the catalysts for n-pentane isomerization at ambient temperature were investigated.
考察了所制备的催化剂上常温下正戊烷异构化反应的活性和选择性。
Influences of preparation conditions on catalytic properties were investigated also and chief reaction conditions were optimized. Conversion and selectivity are over 70% and 90% respectively.
考察了催化剂制备条件对其性能的影响，并对主要反应条件进行了优化，反应的转化率和选择性分别达到70%和90%以上。
The catalyst has high catalytic activity and excellent stability, both the conversion rate of TAME and the selectivity of isoamylene can be over 99%.
该催化剂具有良好的活性和稳定性，TAME转化率和异戊烯的选择性均超过99%。
The effects of reaction conditions in the hydrothermal process on the catalytic activity and selectivity of TS-1 were investigated.
结合物性表征研究了水热合成条件对合成的TS - 1分子筛苯酚羟基化反应活性及选择性的影响。
The mesoscale pores are benefit to the diffusion of larger molecules with low resistance, while the micro-scale pores can provide effective catalytic sites of small molecules with high selectivity.
介孔允许大分子进入孔道同时具有较小的扩散限制，微孔则作为小分子的吸附场所，使小分子能够很好的择型催化。
The effects on the catalytic activity and selectivity of reaction temperature, time, pressure, quantities of catalyst and the kinds of solvent were observed.
分别考察了反应温度、反应压力、反应时间、催化剂用量及反应溶剂对反应的影响。
The catalyst has high activity, high selectivity, high stability, long service life and high catalytic efficiency.
本发明使得催化剂的活性和选择性高、稳定性好、使用寿命长、催化效率大大提高。
The catalyst has high activity, high selectivity, high stability, long service life and high catalytic efficiency.
本发明使得催化剂的活性和选择性高、稳定性好、使用寿命长、催化效率大大提高。
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