HC, CO and NOx emissions reduction efficiency of a prototype catalyst in gasoline bi-mode SI/HCCI engine

Ahmad O. Hasan, Ahmad Abu-Jrai, Ala'a H. Al-Muhtaseb, Athanasios Tsolakis, Hongming Xu

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Lean and highly diluted homogeneous charge compression ignition (HCCI) engines offer great potential in improving vehicle fuel economy and contribute in reducing CO2 emissions. Hydrocarbons and CO emissions from HCCI engines can be higher than those from spark ignition (SI) engines, especially at low engine load when the residual gas required to control NOx emission are elevated. Although, NOx emissions are significantly low, a bi-functional after treatment device will be required to control HC, CO and NOx emissions under lean and stoichiometric (oxygen free) engine operating conditions. This paper describes studies on the NOx, HC and CO emissions reduction efficiency of a prototype catalyst, under lean and stoichiometric engine conditions at different loads, speeds, and A/F. A comparative study of catalyst performance will be analysed under HCCI stoichiometric and SI operation under three engine speeds and load of 4 bar (Net Mean Effective Pressure, NMEP). Experimental results indicate that the HC and CO emissions reduction over the prototype catalyst was in the range of 90-95% while the maximum NOx emissions reduction under lean engine operating conditions was in the range of 35-55%. The catalyst efficiency in reducing the three pollutant emissions is closely related to the exhaust gas conditions (e.g. temperature and space velocity), oxygen and composition i.e. NOx, CO and HC concentrations.

Original languageEnglish
Pages (from-to)2410-2416
Number of pages7
JournalJournal of Environmental Chemical Engineering
Volume4
Issue number2
DOIs
Publication statusPublished - Jun 1 2016

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Carbon Monoxide
Electric sparks
Gasoline
Ignition
engine
catalyst
compression
Engines
Catalysts
Oxygen
Emission control
oxygen
Fuel economy
Hydrocarbons
Exhaust gases
emission reduction
Internal combustion engines
emission control
Gases
comparative study

Keywords

  • Catalyst
  • Combustion
  • HCCI engine
  • Three-way catalytic converters

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Process Chemistry and Technology
  • Pollution
  • Waste Management and Disposal

Cite this

HC, CO and NOx emissions reduction efficiency of a prototype catalyst in gasoline bi-mode SI/HCCI engine. / Hasan, Ahmad O.; Abu-Jrai, Ahmad; Al-Muhtaseb, Ala'a H.; Tsolakis, Athanasios; Xu, Hongming.

In: Journal of Environmental Chemical Engineering, Vol. 4, No. 2, 01.06.2016, p. 2410-2416.

Research output: Contribution to journalArticle

Hasan, Ahmad O. ; Abu-Jrai, Ahmad ; Al-Muhtaseb, Ala'a H. ; Tsolakis, Athanasios ; Xu, Hongming. / HC, CO and NOx emissions reduction efficiency of a prototype catalyst in gasoline bi-mode SI/HCCI engine. In: Journal of Environmental Chemical Engineering. 2016 ; Vol. 4, No. 2. pp. 2410-2416.
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