摘要:

AbstractProcesses for lowering NOxemissions in flue gases. The authors survey processes currently under development for reducing NOxemission levels of combustion units. Primary measures, i.e. acting upon the combustion process itself, do not suffice to meet the recently stiffened limiting emission values; particular attention is therefore paid to secondary measures involving the flue gases. The article describes both wet processes and dry catalytic and non‐catalytic processes, some of which can also be employed for simultaneous removal of NOxand SO2. In view of the fast large‐scale implementation demanded, only a few, already extensively developed processes will presumable be accepted, and will play a considerable role on an industrial sc

ISSN:0009-286X    

DOI:10.1002/cite.330570902

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330570904

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractSystematic approach to development of catalysts for oxidation reactions. The systematic catalyst development presented here for the example of a typical oxidation reaction shows that a systematic procedure is of value for a purposeful approach, and that statistically based planning and evaluation of experimental results represents an efficient tool. Physicochemical methods of study can provide important support for an understanding of catalytic action, with reaction‐engineering studies in various kinds of reactors necessarily playing a central role in catalyst development. Technical and economic assessment of a catalyst under development is already feasible in laboratory experiments and ultimately decides for or against its technical applicability. Understandably, the scale‐up of a production procedure developed in the laboratory to industrial quantities may also be beset with other problems which cannot be considered h

ISSN:0009-286X    

DOI:10.1002/cite.330570905

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330570906

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractDevelopment of silicon carbide composites. This paper describes the production of fibre‐reinforced SiC composites applying the methods of chemical vapour impregnation (CVI), reaction bonding by liquid silicon impregnation (RB‐SiC), and impregnation with subsequent polymerisation and thermal decomposition of organosilicon compounds. The chemical and physical fundamentals of these processes are discussed. Composites of different fibre/matrix combinations are introduced; the most promising combinations can be selected from the experimental results presen

ISSN:0009-286X    

DOI:10.1002/cite.330570907

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractMicrofiltration of fermentation broths. Crossflow microfiltration is a modern process for the work‐up of fermentation broths. In the case of intracellular components, the cells can be enriched by this technique prior to disintegration of the cells. Extracellular products can be separated from the cells by the microfiltration membrane, and also from solids originating from the nutrient. The approach adopted in isolation of dissolved products by crossflow microfiltration is illustrated for alkaline protease, particular attention being directed to the dependence of the flow of permeate and the retention of the membrane material, the mean pore size of the membrane, the operating conditions, the physical data of the fermentation broth, and the addition of solids, which are discussed and quantifie

ISSN:0009-286X    

DOI:10.1002/cite.330570908

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

摘要:

AbstractBubble columns – present knowledge and future trends. Considering the abundance of phenomenological and empirical studies on bubble columns, future research and development should place greater emphasis on theory. This paper therefore reports on suggested theoretical concept, new hydrodynamic models, and results of turbulence theory, and considers their potential influence on the development of new reactor models for bubble column reactor

ISSN:0009-286X    

DOI:10.1002/cite.330570909

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330570910

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330570911

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY

ISSN:0009-286X    

DOI:10.1002/cite.330570912

出版商:WILEY‐VCH Verlag    

年代:1985

数据来源: WILEY