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Manganese based materials for diesel exhaust SO2 traps

Paper ID Volume ID Publish Year Pages File Format Full-Text
48857 46524 2006 8 PDF Available
Title
Manganese based materials for diesel exhaust SO2 traps
Abstract

The storage of SO2 in manganese based materials was investigated in flow reactor experiments. Manganese oxide precipitated with ammonia and hydrogen peroxide stored about 76 wt.% of SO2 at a high diffusion rate into the bulk. Doping with potassium increases the SO2 storage rate substantially at 200 °C, but has an only minor effect at 400 °C. Kinetic studies showed that the storage of SO2 in pure and potassium doped manganese oxide is controlled by the kinetics of the sulfate formation reaction on the catalyst surface up to complete sulfation, whereas the storage on manganese cerium mixed oxide is limited by internal diffusion of the formed sulfate. The sulfate formation reaction was found to be first order with respect to both SO2 and manganese oxide. For the potassium doped catalyst sulfur was found to be bound on manganese sites being transferred to potassium afterwards.

Keywords
Diesel; SO2; Trap; Sulfur; Poisoning; Storage; Manganese; Potassium
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 67, Issues 3–4, 5 October 2006, Pages 160–167
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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