Air Permitting Considerations Related to Firing Petroleum Coke in Lime Kilns, 2006 Engineering, Pulping, & Environmental Conference

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A number of US paper mills recently began using petroleum coke (petcoke) as the primary fuel in their lime kilns. Firing petcoke in a lime kiln is an ideal application of the fuel because of the kiln’s inherent scrubbing capabilities. Changes in air emissions associated with a fuel switch to petcoke may require air permitting activity. Determining air emission changes and the associated permitting implications is a mill specific process. There are several factors that can affect the permitting analysis, including emission factors, amount of petcoke usage, and existing pollution control technology. This paper provides an overview of air permitting issues related to petcoke firing in a lime kiln with updated information on emission factors, mills that recently under went permitting, BACT analyses, and stack tests.