Testing of a Pilot-Scale Ozone-Enhanced Catalytic Reactor for Oxidative Treatment of Waste Gas Emissions from the Pulp and Paper Industry, 2009 TAPPI Engineering, Pulping, Environmental Conference

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The purpose of this pilot-scale test of ozone-enhanced catalytic oxidation technology at Domtar Kraft pulp and paper mill was to investigate the treatment of high volume, low concentration waste gas streams at their source. The waste gas stream contained volatile organic compounds (mainly methanol (460 ± 230 ppm)) and total reduced sulfur compounds (dimethyl sulfide = 5500 ± 2300 ppm, dimethyl disulfide= 170 ± 86 ppm). The study followed long developmental work on bench-scale studies using synthetic waste gas containing methanol and dimethyl sulfide. In the bench-scale studies, moisture effects on the reaction were minimal, and there was no observable deactivation of catalyst.

Ozone-enhanced catalytic oxidation has low capital and operating costs and does not require major changes in the pulping process. It can be “dropped-in” using existing infrastructure with little disruption with the core process. The process eliminates the frequent flameout problems at the incinerator, due to the low fuel value of blow gas and stripper overhead gas streams.