GroundRules
40 CFR 1065.265: Nonmethane cutter.
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER U—AIR POLLUTION CONTROLS
- PART 1065—ENGINE-TESTING PROCEDURES
- Subpart C—Measurement Instruments
(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.
Collected 2026-08-27T02:26:04Z. Source file · JSON