Code of Federal Regulations (Last Updated: July 5, 2024) |
Title 40 - Protection of Environment |
Chapter I - Environmental Protection Agency |
SubChapter U - Air Pollution Controls |
Part 1065 - Engine-Testing Procedures |
Subpart C - Measurement Instruments |
Hydrocarbon Measurements |
§ 1065.265 - Nonmethane cutter.
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§ 1065.265 Nonmethane cutter.
(a) Application. You may use a nonmethane cutter to measure CH4 with a FID analyzer. A nonmethane cutter oxidizes all nonmethane hydrocarbons to CO2 and H2O. You may use a nonmethane cutter for raw or diluted exhaust for batch or continuous sampling.
(b) System performance. Determine nonmethane-cutter performance as described in § 1065.365 and use the results to calculate CH4 or NMHC emissions in § 1065.660.
(c) Configuration. Configure the nonmethane cutter with a bypass line if it is needed for the verification described in § 1065.365.
(d) Optimization. You may optimize a nonmethane cutter to maximize the penetration of CH4 and the oxidation of all other hydrocarbons. You may humidify a sample and you may dilute a sample with purified air or oxygen (O2) upstream of the nonmethane cutter to optimize its performance. You must account for any sample humidification and dilution in emission calculations.
[70 FR 40516, July 13, 2005, as amended at 73 FR 37300, June 30, 2008; 76 FR 57442, Sept. 15, 2011]