摘要:

Hydrogenation of vegetable oils is one of the earliest commercial gas-liquid- solid heterogeneous catalytic processes. usually employed to reduce the degree of unsaturation of the naturally occurring triglycerides so as to obtain new, attractive organoleptic changes, and a greater chemical stability. Due to its intrinsic challenge and to its commercial importance, the process has drawn the attention of numerous scholars. Accordingly, there exists a great deal of work which has both generated empirical rules and allowed us to tackle many of the theoretical aspects of the problem as well.

ISSN:0161-4940    

DOI:10.1080/01614948808078615

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

The drive to develop new tools for surface analysis and catalyst evaluation is motivated in part by the need to enhance the rate of industrial heterogeneous catalyst development. Although a variety of model catalytic systems are known in considerable detail, the operation of many commercial catalysts remains an enigma and commercial catalyst development is still by and large a slow, painstaking process. This is particularly true for catalysts with poorly defined surfaces such as mixed metal oxides used in selective oxidation and ammoxidation. Because of the complexity of developing new metal oxide catalysts we began work directed toward improving the efficiency of the catalyst development process. The result of that work is a new catalyst evaluation technique which we call TAP (temporal analysis of products). This article describes the TAP experiment and illustrates with examples its utility in heterogeneous catalyst research.

ISSN:0161-4940    

DOI:10.1080/01614948808078616

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

Catalytic hydrodenitrogenation (HDN) is a process in which organonitrogen compounds are removed from hydrocarbon feedstocks to produce processible, stable, and environmentally acceptable liquid fuels and lube base stocks. When coupled with hydrodesul-furization (HDS), this process is commonly referred to as “hydro-treating,” which is an integral part of oil refining. While it has long been recognized that HDN is more difficult than HDS, the former has historically been of little concern to the refiners because of the comparatively small quantities of nitrogen compounds present in conventional petroleum stocks. This situation, however, will certainly change because of the growing need to process heavy and low-quality stocks, and the anticipated need to upgrade syncrudes, both of which are rich in highly refractory nitrogen compounds. At present, conventional HDS catalyst technology is adapted for HDN, despite the fact that it is not ideally suited for nitrogen removal. In recent years there has been considerable interest in the development of more effective HDN catalysts, as witnessed by the rapidly expanding patent literature in this area.

ISSN:0161-4940    

DOI:10.1080/01614948808078617

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0161-4940    

DOI:10.1080/01614948808078614

出版商:Taylor & Francis Group    

年代:1988

数据来源: Taylor