Question
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Besides improved catalyst systems, what advances in reactor internals are improving efficiency and throughput while also mitigating the effect of fouling and catalyst poisons?
Mar-2023
Answers
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Jeff Kaufman, Becht, jkaufman@becht.com
Improved understanding of feed quality, reactor and flow modelling through reactor systems (CFD modelling) has allowed licensors and catalyst vendors to improve their internals and tailor their catalyst systems. Improved feed filtration systems reduce particulate and fouling on top catalyst beds.
Improved distribution trays/internals and quench mixing allow better utilisation of loaded catalysts and reduce the risk of partial bed bypassing and/or hot spot formation. These increase the potential operating range for the reactor. In addition, the best new internals designs take up less space (allowing more room for active catalyst). They are designed for easy assembly and disassembly, reducing unit downtime during a turnaround and catalyst replacement.
We also note that when new internals are installed in existing reactors, the upgrade should strongly consider new bed temperature indicators (TIs) for better temperature control and reactor monitoring. Finally, graded/tailored catalyst loads, including specifically designed materials for fine particulate and/or maximum metals trapping, allow sustained operation with high catalyst activity and reduced fouling/pressure drop.
Mar-2023
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