摘要:

Transition from the usual steady-state mode of continuous processes toward forced unsteady-state conditions (FUSC) has been discussed in chemical engineering literature since the beginning of the 1960s [1-12]. FUSC can be created by periodic variations of temperature, composition, or other parameters to the inlet of a chemical unit.

ISSN:0161-4940    

DOI:10.1080/01614949608006453

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Evidence has accumulated in the last 20 years that spillover processes play a crucial role in many catalytic phenomena. Four symposia have highlighted the advances of knowledge in this area, and the progressive recognition that the phenomena have extremely important consequences (Delmon et al., 1973; Inui et al., 1993; Pajonk et al., 1983; Steinberg, 1989). In spite of this, very few kinetic models incorporating spillover have been presented. Little attention, if any, is given to these phenomena in the design of processes or in the definition of operating conditions.

ISSN:0161-4940    

DOI:10.1080/01614949608006454

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Understanding of the process of hydrogen redistribution in catalytic cracking has long been recognized as essential to understanding of the coking processes responsible for catalyst decay. Hydrogen redistribution is also thought to be behind the puzzling excess of paraffins over olefins that has been noted by several authors [1-3], and to hold the key to determining the selectivity of cracking reactions. If the transfer of hydrogen during catalytic cracking can be understood and quantified, much of the detail of the overall process should become clear.

ISSN:0161-4940    

DOI:10.1080/01614949608006455

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

ISSN:0161-4940    

DOI:10.1080/01614949608006456

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor