负载型金属氧化物催化剂的分子设计

1 前言近期研究表明,当一种金属氧化物(如Re_2O_7CrO_3、MoO_3、WO_3、V_2O_5、Nb_2O_5等)沉积在一种金属氧化物(如Al_2O_3、TiO_2、SiO_2等)基质上时就形成二维过渡金属氧化物覆盖层。在过去的十年间,由于这些负载型金属氧化物材料在众多催化领域的重要应用,     

化肥催化剂国家工程研究中心的设计

介绍化肥催化剂国家工程研究中心的总体设计、工艺方案选择和技术经济指标。     

催化剂捏和机的设计

为适应固体催化剂的成型生产设计专用的捏和机,阐述该机的工作原理、总体结构、关键部件的设计。该机能满足催化剂挤出工艺的要求,增加挤出催化剂的密度与强度,提高催化剂质量,并解决了母料较干较硬的催化剂难以挤出的难题。     

杂多酸催化剂走向分子设计

从分子设计的角度讨论了杂多酸的结构与催化性能、制备方法以及在有机合成、石油化工中的应用进展。     

小型催化剂捏和机的设计

阐述了小型催化剂捏和机的设计原理和结构。     

催化重整装置催化剂管线的配管设计

本文结合某1.0×106t/a催化重整装置,就如何防止重整催化剂磨损,从平面布置、管道走向、设计选材、施工要求等方面讨论重整催化剂管线的配管设计。     

小型催化剂捏和机的设计

阐述了小型催化剂捏和机的设计原理和结构。     

雷尼镍催化剂

雷尼镍（Ｒａｎｅｙ－Ｎｉ）是一种历史悠久、应用广泛的催化剂，近几十年来，在Ｒａｎｅｙ－Ｎｉ制备、表征和改性等方面的研究进展，大大加深了对其物性和制备机理的了解。本文对此作了综述。     

Application of Combinatorial Technologies for Catalyst Design and Development

To increase the rate of materials discovery and optimization, different strategies and technologies for the combinatorial synthesis and evaluation of functional materials have been developed. In this article, the use of combinatorial techniques as a method for the high-speed chemical synthesis and high-throughput screening of new inorganic and organic catalysts is surveyed.     

除臭用陶瓷催化器的工艺初探

阐述了除臭用陶瓷催化器的催化机理 ,详细探讨了多孔陶瓷载体的研制、表层活性氧化铝的涂载技术 ,以及贵金属催化剂的浸渍工艺     

新型MC尼龙催化剂简介

介绍原捷克国家科学院无机合成研究所研制的一种新型MC尼龙催化剂DILAKTAMAT原理。该催化剂是由Na、Al和CH_3OCH_2CH_2OH在50.66 MPa、100℃下用H_2还原生成的NaAlH_2(OCH_2CH_2OCH_3)_2与己内酰胺反应合成的。采用DILAKTAMAT为主催化剂MDT为助催化剂生产的MC尼龙,在保留其他性能不变的条件下,具有较高的冲击强度,由一般MC尼龙的6.9kJ/m~2提高到30.5kJ/m~2。该MC尼龙主要用于铁路系统站区内信号绝缘用道夹板,以取代原有的钢制鱼尾板。     

LH—02催化剂在制氢原料加氢脱硫上的应用研究

简述了馏份油加氢精制催化剂ＬＨ－０２与制氢原料加氢脱硫Ｂ催化剂在１００ｍｌ加氢装置上的对比评价试验,结果表明,ＬＨ－０２催化剂有更好的加氢脱硫活性和活性稳定性。     

聚丙烯高效载体催化剂

简述了国外聚丙烯高效载体催化剂的发展概况,对国内聚丙烯高效载体催化剂的开发应用情况进行了较详细的介绍和比较。文章还介绍了聚丙烯高效载体催化剂体系的组成和主要制备方法,并就国内间歇式液相本体法聚丙烯开发应用高效载体催化剂提出了具体的建议。     

MB—86丙烯腈催化剂的研制及应用

MB—86丙烯腈催化剂应用于工业装置中,丙烯腈单程收率达到81％(比进口催化剂高4％～5％),并表现出优良的反应性能和稳定性。通过试验使该催化剂生产的全部原料实现了国产化。     

Manufacture of Robust Catalyst Layers for the DMFC

Catalyst layers for direct methanol fuel cells (DMFC) must possess a complex structure in order to provide protonic and electronic conductivity as well as access to reactants at all reactive sites. This involves a highly porous structure, which is often mechanically instable, especially when mass production processes are utilized. A feasible process should provide a catalyst layer in one coating step and must include relatively fast drying of the catalyst ink. In the present work, different types of additives are used to provide such an ink. Inorganic particles that are much larger than the catalyst particles provide dimensional stability in the catalyst layer. Depending on their structure and surface, they can also be used to influence the porosity or hydrophobicity of the layers, and thus to optimize performance. Gel forming polymers are used to adjust the viscosity of the inks and since they also act as a binder, they help to stabilize the catalyst layers. These effects can be obtained by using minimal quantities of polymers, thus avoiding problems such as pore clogging or the deactivation of catalyst surfaces. As a result, catalyst inks can be adjusted to suit coating techniques such as knife‐coating or screen‐printing. Also, catalyst layers are mechanically stable, thus avoiding long‐term degradation due to crack formation or delamination.     

渣油加氢处理催化剂失活研究

考察了高压加氢釜式反应器中不同活性的催化剂在渣油加氢处理过程中的失活情况。结果表明,在渣油加氢处理反应过程中,氧化铝载体并不是仅仅起到一个负载活性组分的“载体”的作用,也具有一定的反应活性。