ISSN:0009-286X    

DOI:10.1002/cite.330510802

出版商:WILEY‐VCH Verlag    

年代:1979

数据来源: WILEY

摘要:

AbstractSome of the ramifications ofWicke's work on creeping fronts in fixed beds are reviewed in this paper. His work laid the experimental foundations for model building byVortmeyerandJahnelon the one hand and byAmundsonandRheeon the other. These workers showed how slowly moving waves could arise in various models of these systems. The relation between such a creeping front and a travelling wave of fixed form is further discussed and some of the more recent biological applications are mentioned.

ISSN:0009-286X    

DOI:10.1002/cite.330510803

出版商:WILEY‐VCH Verlag    

年代:1979

数据来源: WILEY

摘要:

AbstractRotary kiln in chemical engineering.This review stresses the importance of rotary kilns in industry. After a brief account of design considerations, the following processes are treated: particle and product motion, longitudinal and transverse transfer of solids, mass‐ and heat transfer, as well as chemical reactions. Common models used for rotary kilns are discussed. Typical industrial processes employing rotary kilns are presented. The present status of control and automation of these plants are discusse

ISSN:0009-286X    

DOI:10.1002/cite.330510804

出版商:WILEY‐VCH Verlag    

年代:1979

数据来源: WILEY

摘要:

AbstractLaboratory reactors for catalytic gas‐solid reactions – new developments.Some laboratory reactors for catalytic gas‐solids reactions are scaled‐down versions of commercial units. Though substantial effects of heat and mass transfer frequently also have to be considered, kinetic and other pertinent data may be gained by refined computational methods. Other types of laboratory reactors are highly spezialized apparatus for gathering kinetic data under carefully controlled conditions. More recent developments are intended to increase the efficiency of rate measurements by applying dynamic methods or by simultaneously observing related phenomena. The topics of the present review are the nonisothermal fixed bed reactor with special regard to axial heat conduction, the nonisothermal catalytic tube wall reactor, and the recycle reactor with controlled concent

ISSN:0009-286X    

DOI:10.1002/cite.330510805

出版商:WILEY‐VCH Verlag    

年代:1979

数据来源: WILEY

摘要:

AbstractSulphuric acid production – state of the art.Apart from pyrites and other metal sulfides, sulphur is mainly used today as raw material for the production of sulphuric acid. The oxidation of roaster gases or sulphur combustion gases is performed almost exclusively in multistage reactors over catalysts containing vanadium pentoxide. SO2conversions of more than 99.5% are achieved by intermediate absorption of SO3(“double catalysis”) and by using efficient catalysts. To further improve the economics of the manufacturing process, new technologies are being tried out, and attempts are being made to develop even more active catalysts. Although there is still some uncertainty regarding the kinetics of SO2oxidation, empirical findings can be explained quite satisfactorily with existing m

ISSN:0009-286X    

DOI:10.1002/cite.330510806

出版商:WILEY‐VCH Verlag    

年代:1979

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330510807

出版商:WILEY‐VCH Verlag    

年代:1979

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330510808

出版商:WILEY‐VCH Verlag    

年代:1979

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330510809

出版商:WILEY‐VCH Verlag    

年代:1979

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330510811

出版商:WILEY‐VCH Verlag    

年代:1979

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330510812

出版商:WILEY‐VCH Verlag    

年代:1979

数据来源: WILEY