Catalysts Deactivation, Poisoning and Regeneration

Dear Colleagues,

Catalyst life-times represent one of the most crucial economic aspects in most industrial catalytic processes, due to costly shut-downs, catalyst replacements and proper disposal of spent materials.

Though catalyst deactivation is inevitable, it can be slowed or prevented and some of its consequences can be avoided. Not surprising, there is considerable motivation to understand and treat catalyst decay, which causes this research topic to continue to grow.

Deactivation can occur via a number of different, often simultaneous, mechanisms, both chemical and physical in nature, such as poisoning, fouling, coking, thermal degradation, loss of active phase, and mechanical failure.

A deep comprehension and the modeling of deactivation mechanisms are required to modify a catalyst and/or process in order to limit, for example, the negative impact of contaminants.

In fact, several types of poisons must be considered, and the complexity obviously increases along with the increasing use of biomass/waste-derived/residual feedstocks and with requirements for cleaner processes.

This Special Issue will be focused on recent advances in the comprehension of some specific deactivation mechanism of heterogeneous catalysts, as well as on novel catalyst formulations with enhanced stability/tolerance under real life operating conditions, and, eventually, on suitable catalyst regeneration strategies that can alleviate the technical and economic risks associated with their possible substitution.      

Dr. Luciana Lisi
Dr. Stefano Cimino
Guest Editors

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