---
kind: "section"
citation: "40 C.F.R. § 98.160"
title: "40"
number: "98.160"
heading: "Definition of the source category."
url: "https://uscodex.org/cfr/40/98.160"
---

# §98.160. Definition of the source category.

- (a) **A hydrogen production source category consists of facilities that produce hydrogen gas as a product.**
- (b) This source category comprises process units that produce hydrogen by reforming, gasification, oxidation, reaction, or other transformations of feedstocks except the processes listed in paragraph [(b)(1)](#b-1) or [(2)](#b-2) of this section.
  - (1) **Any process unit for which emissions are reported under another subpart of this part.** This includes, but is not necessarily limited to:
    - (i) **Ammonia production units for which emissions are reported under subpart G.**
    - (ii) Catalytic reforming units at petroleum refineries that transform naphtha into higher octane aromatics for which emissions are reported under subpart Y.
    - (iii) **Petrochemical process units for which emissions are reported under subpart X.**
  - (2) Any process unit that only separates out diatomic hydrogen from a gaseous mixture and is not associated with a unit that produces hydrogen created by transformation of one or more feedstocks, other than those listed in [paragraph (b)(1)](#b-1) of this section.
- (c) This source category includes the process units that produce hydrogen and stationary combustion units directly associated with hydrogen production (e.g. , reforming furnace and hydrogen production process unit heater).

## Notes

### Amendments

[89 FR 31925, Apr. 25, 2024]

### Authority

Authority: 42 U.S.C. 7401-7671q.

### Source

Source: 74 FR 56374, Oct. 30, 2009, unless otherwise noted.

### Amendments

[89 FR 31925, Apr. 25, 2024]