Techno-Economic Evaluation of Co-Removal of NO x and SO x Species from Flue Gases via Enhanced Oxidation of NO by ClO 2 —Case Studies of Implementation at a Pulp and Paper Mill, Waste-to-Heat Plant and a Cruise Ship

Jakob Johansson, Fredrik Normann and Klas Andersson
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Jakob Johansson: Department of Space, Earth and Environment, Chalmers University of Technology, 41296 Gothenburg, Sweden
Fredrik Normann: Department of Space, Earth and Environment, Chalmers University of Technology, 41296 Gothenburg, Sweden
Klas Andersson: Department of Space, Earth and Environment, Chalmers University of Technology, 41296 Gothenburg, Sweden

Energies, 2021, vol. 14, issue 24, 1-18

Abstract: Co-absorption of NO 2 and SO 2 from flue gases, in combination with the enhanced oxidation of NO by ClO 2 (g), is studied for three different flue gas sources: a medium sized waste-to-heat plant; the kraft recovery boiler of a pulp and paper mill; and a cruise ship. Process modeling results are used to present the technical potential for each site together with cost estimation and optimization using a bottom-up approach. A process set-up is proposed for each site together with equipment sizing and resulting flows of process fluids. The simulation results, supported by experimental results, show that removal rates equal to or greater than current best available technologies are achievable with more than 90% of NO x and 99% of SO 2 removed from the flue gas. The resulting cost of removing both NO x and SO 2 from the flue gases is 2100 €/ton for the waste-to-heat plant, 800 €/ton for the cruise ship and 3900 €/ton for the recovery boiler. The cost estimation show that the consumption and cost of chemical additives will play a decisive role in the economic feasibility of the investigated concept, between 50% and 90% of the total cost per ton acid gas removed.

Keywords: flue gas cleaning; co-absorption; NO x; SO 2; gas-phase oxidation; ClO 2 (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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