Investigations of the Effect of Humid Air on NOX & PM Emissions of a CNG Engine [Research Brief]

Rahai, Hamid R.; California State University, Long Beach. Center for Energy and Environmental Research and Services (CEERS); METRANS Transportation Center (Calif.)

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Investigations of the Effect of Humid Air on NOX & PM Emissions of a CNG Engine [Research Brief]

2017-12-01
By Rahai, Hamid R.

[PDF-460.80 KB]

English

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Creators:

Rahai, Hamid R.
Corporate Creators:

California State University, Long Beach. Center for Energy and Environmental Research and Services (CEERS) ; METRANS Transportation Center (Calif.)

California State University, Long Beach. Center for Energy and Environmental Research and Services (CEERS) ; METRANS Transportation Center (Calif.) Less -
Corporate Contributors:

United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology

United States. Department of Transportation. University Transportation Centers (UTC) Program ; United States. Department of Transportation. Office of the Assistant Secretary for Research and Technology Less -
Subject/TRT Terms:

[+]

Carbon Dioxide Compressed Natural Gas Exhaust Gases Humidity Mathematical Models Natural Gas Vehicles Nitrogen Oxides Particulates Simulation
Resource Type:

Brief
Geographical Coverage:

United States
Corporate Publisher:

METRANS Transportation Center (Calif.)
Abstract:

The goal of the investigation was to determine the feasibility of using a humid air system for reducing NOx emissions of CNG engines. Humid air system or fumigation has been an effective approach in reducing diesel NOx emissions. In this method, water vapor is injected in the intake air supplied to the engine cylinders. The process reduces the local temperature in the cylinder and raises the specific heat of the air-fuel mixture which also contributes to the elimination of the hot spots in the engine's cylinders. With decreased temperature, NOx reduction is achieved. With an optimized system, fumigation could reduce NOx emissions without significant increases in hydrocarbon emissions. Other benefits of this process include longer life of the engine components due to reduced cycle temperature and reductions in carbon deposits.
Format:

PDF
Funding:

65A0533
Collection(s):

University Transportation Centers
Main Document Checksum:

[+]

urn:sha256:ed3308cdba26b1ea4fed013d72e634c0982490ca39e48fb4ed072796c73d2f1c
Download URL:

https://rosap.ntl.bts.gov/view/dot/67589/dot_67589_DS1.pdf
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Investigations of the Effect of Humid Air on NOX & PM Emissions of a CNG Engine [Research Brief]

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