December 2021

Process Optimization

Design and scale-up of gaseous Group A fluid bed systems for chemical synthesis

More than 100 fluid bed reactors for chemical synthesis and comparable processes using Group A powders have been installed and operated successfully since the late 1940s, with some reactors having an inside diameter at much larger than 7 m (23 ft).

Jazayeri, B., Contributing Editor

More than 100 fluid bed reactors for chemical synthesis and comparable processes using Group A powders have been installed and operated successfully since the late 1940s, with some reactors having an inside diameter at much larger than 7 m (23 ft). This article discusses developmental milestones leading to their success, the key design differences between chemical synthesis circulating fluid beds and fluid catalytic cracking (FCC), and the author’s recipe for successful scale-up. Root causes of typical operational issues of this class of beds are also discussed. Introduction Types of gas fluid beds used typically include: Fixed fluid bed (FFB), also called bubbling or conventional fluid

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