Impact of high sulfur fuel and de-sulfation process on a close-coupled diesel oxidation catalyst and diesel particulate filter

摘要: Abstract The application of more stringent emission regulations for passenger cars in Asian and South American countries is challenging due to the presence low-quality diesel fuel, which enhances risk deactivation aftertreatment systems its higher sulfur content. In this context, impact high fuel on performance a close-coupled Diesel Oxidation Catalyst (DOC) Particulate Filter (DPF) was experimentally tested degreened, sulfated de-sulfated real size components, through engine tests carried out highly-dynamic test rig, allowing reproduce transient operation system during type approval driving cycles. order assess poisoning, specific poisoning procedure adopted resulted different levels. space velocities poisoned examined compared considering light-off curves CO HC. found be worst effected increasing velocities. addition, ability recover after regeneration proper de-sulfation strategy evaluated with respect fresh, catalyst. recovered efficiency almost completely out.