Paragraph 19 Emission limit values for NOx for combustion plants using solid or liquid fuels (with the exception of gas turbines and gas engines)F1
Emission limit values (mg/Nm3) for NOx for combustion plants using solid or liquid fuels with the exception of gas turbines and gas engines are, unless the circumstances in sub-paragraphs (2) to (6) are as stated in Table 3—
Table 3
| Total rated thermal input (MW) | Coal and lignite and other solid fuels | Biomass and Peat | Liquid fuels |
|---|---|---|---|
(1) The emission limit value is 450 mg/Nm3 for the firing of distillation and conversion residues from the refining of crude-oil for own consumption in combustion plants with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003. | |||
| 500-100 | 300 450 in case of pulverised lignite combustion | 300 | 450 |
| 100-300 | 200 | 250 | 200f1 |
| >300 | 200 | 200 | 150 |
Combustion plants in chemical installations using liquid production residues as non-commercial fuel for own consumption with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003, are subject to an emission limit value for NOx of 450 mg/Nm3.
Combustion plants using solid or liquid fuels with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003, and which do not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, are subject to an emission limit value for NOx of 450 mg/Nm3.
Combustion plants using solid fuels with a total rated thermal input greater than 500 MW, which were granted a permit before 1 July 1987 and which do not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, are subject to an emission limit value for NOx of 450 mg/Nm3.
Combustion plants using liquid fuels, with a total rated thermal input greater than 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003, and which do not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, are subject to an emission limit value for NOx of 400 mg/Nm3.
A part of a combustion plant discharging its waste gases through one or more separate flues within a common stack, and which does not operate more than 1,500 operating hours per year as a rolling average over a period of 5 years, may be subject to the emission limit values set out in sub-paragraphs (3) to (5) in relation to the total rated thermal input of the entire combustion plant.
Where sub-paragraph (6) applies, the emissions through each of those flues must be monitored separately.
Annotations
Textual amendments
- F1
Sch. 21 inserted (1.11.2025) by The Environmental Authorisations (Scotland) Amendment Regulations 2025 (S.S.I. 2025/165), reg. 1(2), sch. 12 (with sch. 23)
Footnotes
- f1
(1)
The emission limit value is 450 mg/Nm3 for the firing of distillation and conversion residues from the refining of crude-oil for own consumption in combustion plants with a total rated thermal input not exceeding 500 MW which were granted a permit before 27 November 2002 or where a complete application for a permit was submitted before that date, provided that the plant was put into operation no later than 27 November 2003.