摘要:

AbstractDevelopment of the nozzle separation process for enrichment of uranium. In the nozzle separation process an enrichment of235U is achieved by extremely high centrifugal forces in a curved flow of UF6diluted with a light gas. In Brazil a cascade section consisting of 24 nozzle separation stages has been constructed and has been in operation since late 1985. To produce nozzle separation systems with extremely small characteristic dimensions permitting plant operation at atmospheric pressure, a manufacturing process has been developed which relies on combined X‐ray lithography and microgalvanic deposition (LIGA‐technology). Using this technology the prototype separation stages constructed at the Karlsruhe Nuclear Research Center enable commercial nozzle separation plants with capacities of up to 3 Mio. SWU/year to be reali

ISSN:0009-286X    

DOI:10.1002/cite.330580102

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

摘要:

AbstractExpert systems – structure and fields of application. Expert systems are programs for solving problems in narrow fields of application, which demand the competence of an expert. These systems, which process not only data but primarily knowledge, have attracted considerable interest in recent years. This contribution explains the principal characteristics and the mode of operation of expert systems, and dilineates their potential applications. Moreover, the approach adopted in the development of expert systems is briefly considere

ISSN:0009-286X    

DOI:10.1002/cite.330580103

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

摘要:

AbstractExpert systems in chemical and process engineering. A survey is given of expert systems in chemical and process engineering and adjacent fields of knowledge. The article assumes a knowledge of the basic concepts of artificial intelligence and expert‐system technology. The expert systems, arranged according to their function and domain of expertise, are described and discussed with emphasis on information of interest to the potential user, e.g. on applications, construction, and implementation. Finally, an attempt is made to give an outlook on future applications of technical expert systems and on the abilities which these systems are expected to posses

ISSN:0009-286X    

DOI:10.1002/cite.330580104

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330580105

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

摘要:

AbstractSafety analyses conducted by companies operating chemical plant. The problems with safety analyses have shifted from existing plants to analyses for plants which are subject to an approval procedure. The latter require more effort and cause additional problems although legislation requirements are identical for both types. At BASF safety analyses are carried out by a group of experts responsible for design and operation of the respective plant. The authorities of the State of Rheinland‐Pfalz have formed a team to examine these analyses statewide. Difficulties still exist in presenting every possible hazard source and sequence of failure steps and in quantifying the effects of a hypothetical breakdown. However, one can generally state that the companies have learnt to satisfactorily carry out the extensive documentation task required by la

ISSN:0009-286X    

DOI:10.1002/cite.330580106

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330580108

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

摘要:

AbstractPacked columns. Packed towers with dumped or regular packings are widely used in industry for accomplishing chemical engineering processes. Packed columns are able to work economically even under extreme process conditions (e. g. vacuum, high temperature, aggressive flow mediums), because of the available variety of packing types and the straight‐forward manufacture of the individual packing elements from almost any material. The present contribution shows the different kinds of packings arranged according to their geometry and physical properties. A packed tower for gas/liquid countercurrent operation is shown as a basic construction with the necessary internals. Since packed columns are mostly used in gas/liquid countercurrent operation, the fundamentals of fluid dynamics and mass transfer are presented for this operating conditio

ISSN:0009-286X    

DOI:10.1002/cite.330580109

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

摘要:

AbstractElectrochemical fluorination – a review. The versatile method of electrolysis in hydrogen fluoride solution or suspension is reviewed. An attempt is made to give separate definitions for the different methods of electrochemical fluorination. In addition a supplement, containing tables of all papers and patents published in the past ten years is available.Eine beschränkte Zahl von Kopien kann bei Prof.Sartoriangefordert werd

ISSN:0009-286X    

DOI:10.1002/cite.330580110

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330580111

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330580112

出版商:WILEY‐VCH Verlag    

年代:1986

数据来源: WILEY