[Code of Federal Regulations]

[Title 40, Volume 31]

[Revised as of July 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 40CFR1065.265]



[Page 708]

 

                   TITLE 40--PROTECTION OF ENVIRONMENT

 

         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)

 

PART 1065_ENGINE-TESTING PROCEDURES--Table of Contents

 

                    Subpart C_Measurement Instruments

 

Sec.  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 Sec.  1065.365 and use the results to calculate NMHC 

emission in Sec.  1065.660.

    (c) Configuration. Configure the nonmethane cutter with a bypass 

line for the verification described in Sec.  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.