Lower catalyst resistivities raise precipitator efficiencies

Improved collection efficiencies can be gained in electrostatic precipitators (ESPs) in fluid-catalytic cracking (FCC) units by lowering catalyst resistivity. An understanding of how variables influence the catalyst resistivity helps the operator to optimize the ESP. Maintaining a clean ESP is the best way to achieve high collection efficiencies. These conclusions are based on a report titled "Catalytic properties and FCCU operational variables affecting resistivity," published by Dennis L. Salbilla, Akzo Nobel Chemicals Inc., Houston. Salbilla studied the sensitivities of catalyst resistivities related to several factors: fresh catalyst vs. equilibrated catalyst, alumina co...

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