What is Oxidation?

Oxidation define

This is a preview of the paper, limited to some initial content. Full access requires DieselNet subscription.
to view the complete version of this paper.

Abstract: Particle oxidation catalysts (POC) are specialized diesel oxidation catalysts that utilize substrates with some capacity to capture solid particulates. The captured soot is then oxidized through reactions with nitrogen dioxide. POCs are passive devices, with PM emission reduction efficiency higher than that of the DOC, but lower than diesel particulate filters. Particle oxidation catalysts are a relatively new emission control technology—some aspects of their performance remain not fully characterized.

Introduction

Definition. Particle oxidation catalysts (POC) are devices that can capture and store carbonaceous PM material for a period of time sufficient for its catalytic oxidation, while having open flow-through passages that allow exhaust gases to flow, even if the PM holding capacity is saturated. In other words, the particle oxidation catalyst is a specialized diesel oxidation catalyst with a capacity to hold solid soot particles. The captured particles must be removed from the device through oxidation to gaseous products, in a process called regeneration. The POC regeneration is typically accomplished via reactions between soot and nitrogen dioxide, generated in an upstream NO2 catalyst. Contrary to the diesel particulate filter (DPF), the POC will not plug once filled with soot to its maximum capacity in the absence of regeneration. Rather, the PM conversion efficiency will gradually decrease, allowing the PM emissions to pass through the structure.

Particle oxidation catalysts—a relatively new PM emission control technology—have a particulate control efficiency higher than that of the DOC, but lower than diesel particulate filters. These devices may use different types of substrates, and are known by several names, including:

  • Flow-through filters (FTF)
  • Open particulate filters
  • Partial flow filters
  • Partial filter technology (PFT)
  • PM oxidation catalysts
  • PM filter catalysts
Read electro-mechanical engineering blog
You might also like
9.1.1 Define Oxidation and Reduction in Terms of Electron
9.1.1 Define Oxidation and Reduction in Terms of Electron ...
Oxidation Reductions Define Definitions with examples
Oxidation Reductions Define Definitions with examples ...
Smart Solutions Smart Solutions Curl Nourishing Creme, 7 Ounce
Beauty (Smart Solutions)
  • The super antioxidants in all smart solutions products protect the hair from harmful radicals and eliminate any damage caused by oxidation
  • All smart solutions contain plant extracts for color hold
  • Polyquaternium-46, VP (and) Methacrylamide (and) vinyl imidazole copolymer, curl defining styling resins that add a lot of shine and humidity resistance
  • For defined, bouncy curls, provides volume and bounce
  • A paraben, sulfate and sodium chloride free formula
Fender Fender Custom Shop Abby 69 Stratocaster Strat Pickup Loaded Pickguard White on Black Abby Initialed and Dated
Musical Instruments (Fender)
  • White on Black Loaded Pickguard FENDER Custom Shop Abby 69 Pickups set of 3 initialed and dated by Abby
  • These Fender Custom Shop 69 pickups are dated, and initialed by Abby ( Abigail Ybarra). If you know it, Abby has been working at Fender Custom Shop and has hand...
  • These are the reincarnation of the legendary pickups that used by many guitar heroes since the 60s that have defined the history of rock, blues, and jazz music;
  • Construction: Just like the originals, these Fender pickups are built using height-staggered Alnico V magnets and a special gray bobbin. Each pickup is checked...
  • Fender Custom Shop 69 Strat Pickups offer you a unique construction and vibe. These are the guitar pickups that can deliver the coveted clear, transparent highs;...
Neuma Neuma Neusmooth Revitalizing Masque, 5.25 Fluid Ounce
Beauty (Neuma)
  • Revives dry, brittle hair
  • UVB and UVA protection
  • Adds strength and shine
Related Posts