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BS EN ISO 2612:2023:2024 Edition

BS EN ISO 2612:2023:2024 Edition

$102.76

Analysis of natural gas. Biomethane. Determination of ammonia content by tuneable diode laser absorption spectroscopy

Published By Publication Date Number of Pages
BSI 2024 20
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This document describes several test methods for measuring the ammonia amount fraction in natural gas and biomethane at the trace level (µmol mol-1). The suitable handling and sampling of pressurised mixtures of ammonia in methane that are applied to several different ammonia measurement systems are described. The measurement systems are comprised of readily available commercial spectroscopic analysers that are specific to ammonia. These NH3 analysers are considered as a black box in terms of their operation, which is dependent on the instructions of the manufacturer. The document describes suitable calibration and measurement strategies to quantify ammonia in (bio)methane around and above the 10 mg m-3 (14 µmol mol-1) level and applies to analysis within absolute pressure ranges of 1 bar – 2 bar, temperatures of 0 °C – 40 °C and relative humidity <90 %. References are also made to additional standards that are applied either to natural gas analysis or air quality measurements. In this document the matrix gas is always methane or biomethane and the measurand is the amount fraction NH3. NOTE            1 bar = 0,1 MPa =105 Pa; 1 MPa = 1 N/mm2.

PDF Catalog

PDF Pages PDF Title
2 undefined
11 6.1 NH3 analyser
6.2 Gas delivery system
12 6.3 Temperature sensor
6.4 Pressure sensor
6.5 Calibration equipment
6.5.1 General
6.5.2 Pressure regulators for the NH3 cylinders
6.5.3 Flow controller
6.5.4 Flow meter
6.5.5 Dilution device
13 6.5.6 Output manifold
7.1 Methane
7.2 Calibration gases
7.3 Inert gas
8.1 General
8.2 Construction materials
14 8.3 Cleanliness
8.4 Installation of the calibration gas cylinder
8.5 Pressure control
8.6 Purging of reduction valve and transfer lines
8.7 Flow control
15 8.8 Leak control
9.1 Calibration procedures
9.2 Frequency of calibration
9.2.1 Multipoint calibration
9.2.2 Zero and span point calibration
10.1 Interfering absorbers
10.2 Matrix gas
16 10.3 Secondary level spectroscopic effects: Gas temperature, gas pressure, spatial homogeneity
10.4 Humidity and carbon dioxide
12.1 Quantities and units
12.2 Uncertainty

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BS EN ISO 2612:2023
$102.76