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BS ISO 17179:2016

Current
Current

The latest, up-to-date edition.

Stationary source emissions. Determination of the mass concentration of ammonia in flue gas. Performance characteristics of automated measuring systems
Available format(s)

Hardcopy

Language(s)

English

Published date

06-30-2016

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Principle
6 Description of the automated measuring systems
7 Performance characteristics
8 Measurement procedure
9 Quality assurance and quality control procedures
10 Test report
Annex A (informative) - Extractive differential NO[x]
        measurement technique
Annex B (informative) - Extractive direct NH[3]
        measurement technique
Annex C (informative) - In situ and direct NH[3]
        measurement with TLS analyser
Annex D (normative) - Operational gases
Annex E (normative) - Procedures for determination of the
        performance characteristics during the general
        performance test
Annex F (informative) - Examples of the results for the
        assessment of ammonia AMS
Annex G (informative) - Calculation of uncertainty of
        measurement of NH[3]
Bibliography

Describes the fundamental structure and the most important performance characteristics of automated measuring systems for ammonia (NH[3]) to be used on stationary source emissions, for example, combustion plants where SNCR/SCR NOx control systems (deNOx systems) are applied.

This International Standard specifies the fundamental structure and the most important performance characteristics of automated measuring systems for ammonia (NH 3) to be used on stationary source emissions, for example, combustion plants where SNCR/SCR NO x control systems (deNO x systems) are applied. The procedures to determine the performance characteristics are also specified. Furthermore, it describes methods and equipment to determine NH 3 in flue gases including the sampling system and sample gas conditioning system.

This International Standard describes extractive systems, based on direct and indirect measurement methods, and in situ systems, based on direct measurement methods, in connection with a range of analysers that operate using, for example, the following principles:

  • ammonia conversion to, or reaction with NO, followed by chemiluminescence (CL) NO x difference measurement for ammonia (differential NO x);

  • ammonia conversion to, or reaction with NO, followed by non-dispersive ultraviolet (NDUV) spectroscopy NO x difference measurement for ammonia (differential NO x);

  • Fourier transform infrared (FTIR) spectroscopy;

  • non-dispersive infrared (NDIR) spectroscopy with gas filter correlation (GFC);

  • tuneable laser spectroscopy (TLS).

The method allows continuous monitoring with permanently installed measuring systems of NH 3 emissions, and is applicable to measurements of NH 3 in dry or wet flue gases, for process monitoring, long term monitoring of the performance of deNO x systems and/or emission monitoring.

Other equivalent instrumental methods can be used, provided they meet the minimum requirements proposed in this International Standard. The measuring system can be calibrated with certified gases, in accordance with this International Standard, or comparable methods.

The differential NO x technique using CL has been successfully tested on some power plants where the NO x concentration and NH 3 concentration in flue gas after deNO x systems are up to 50mg (NO)/m 3 and 10mg (NH 3)/m 3, respectively. AMS based on FTIR, NDIR with GFC and TLS has been used successfully in this application for measuring ranges as low as 10mg (NH 3)/m 3.

Committee
EH/2/1
DevelopmentNote
Supersedes 15/30289059 DC. (06/2016)
DocumentType
Standard
Pages
52
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 17179:2016 Identical

ISO 14385-2:2014 Stationary source emissions Greenhouse gases Part 2: Ongoing quality control of automated measuring systems
ISO 14956:2002 Air quality Evaluation of the suitability of a measurement procedure by comparison with a required measurement uncertainty
ISO 12039:2001 Stationary source emissions Determination of the mass concentration of carbon monoxide, carbon dioxide and oxygen in flue gas Performance characteristics of automated measuring systems
ISO 14385-1:2014 Stationary source emissions Greenhouse gases Part 1: Calibration of automated measuring systems
ISO 20988:2007 Air quality Guidelines for estimating measurement uncertainty
ISO 10396:2007 Stationary source emissions — Sampling for the automated determination of gas emission concentrations for permanently-installed monitoring systems
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
ISO 9169:2006 Air quality Definition and determination of performance characteristics of an automatic measuring system

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