Reactor trap to remove hydrocarbons from engine exhaust during cold start

B. L. Yang, Harold H Kung

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The concept and the performance of a device to remove hydrocarbons from engine exhaust during cold start were described. The device consisted of a hydrocarbon adsorbent and a metal oxide that could react with the hydrocarbon by oxidation to form carbon oxide and water. The metal oxide could then be regenerated later in the drive cycle by reaction with oxygen. Using a mixed oxide containing Cr, Co, Fe, and Al; ZSM-5 zeolite as the adsorbent; and propene, propane, or toluene as the hydrocarbon, the efficiency of hydrocarbon removal was measured in the laboratory during the 2 min when the unit was heated from room temperature at a rate of 150 °C/min. The efficiency was found to be suppressed by the presence of water vapor, but not affected by the presence of CO and CO2. With a mixture of 10% H2O, 2% CO, 0.6% O2, 2000 ppm hydrocarbon, and the balance helium, the efficiencies were 92, 78, and 57% for toluene, propene, and propane, respectively. A conceptual device to remove the hydrocarbon efficiently was described.

Original languageEnglish
Pages (from-to)1561-1564
Number of pages4
JournalEnvironmental Science and Technology
Volume28
Issue number8
Publication statusPublished - 1994

Fingerprint

Vehicle Emissions
Exhaust systems (engine)
Hydrocarbons
engine
hydrocarbon
Oxides
Propane
propane
Toluene
Carbon Monoxide
toluene
Adsorbents
Propylene
Metals
oxide
Helium
Steam
reactor
cold
zeolite

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Reactor trap to remove hydrocarbons from engine exhaust during cold start. / Yang, B. L.; Kung, Harold H.

In: Environmental Science and Technology, Vol. 28, No. 8, 1994, p. 1561-1564.

Research output: Contribution to journalArticle

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