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Emission |
Source |
Effect |
Green House Gas Potential Relative to CO2 |
CO2 (Carbon dioxide) |
Complete combustion of carbon in fuel |
Global Warming |
1 |
CO (Carbon Monoxide) |
Incomplete combustion of carbon in fuel |
Smog |
|
SO2 (Sulphur Dioxide) |
Combustion of sulphur in fuel (Sulphur is NOT a component of natural gas) |
Smog, Acid Rain |
|
NOx (Nitrous Oxide) |
By-product of most combustion processes |
Acid Rain |
|
N2O (Nitrous Oxide) |
By-product of some combustion processes |
Global Warming |
310 |
VOCs (Volatile Organic Compounds) |
Leakage and evaporation of liquid fuels |
Smog |
|
CH4 (Methane) |
Natural Gas Leaks |
Global Warming |
21 |
H2O (Water Vapor) |
Hydrogen in fuel mixing with oxygen in the combustion process |
Localized Fog |
|
Particulates (Dust, Soot, Fumes) |
Unburned carbon from fuel, including ash and dirt |
Smog, Respiratory Hazard |
|
Trace Elements |
Impurities in fuel |
Unknown and Potential Carcinogens |
|
Halogenated and Chlorinated Compounds |
Compounds in fuel or combustion air containing halogens (Chlorine, fluorine, bromine and iodine) |
Potential carcinogens, Global Warming |
|
For a complete discussion about NOx, NOx Control and low-NOx Equipment, see Boiler Emissions Workshop
Source: The above Table appears in several sources in similar formats and content; the original source is unknown to Bob Fegan 2-2005;