DIN Standards Committee Gas Technology
Method to calculate GHG emissions at LNG plant
Abstract
This document provides a method to calculate the GHG emissions from an LNG liquefaction plant, onshore or offshore. NOTE 1: equivalent methods will eventually be developed to cover all parts of the LNG chain. The frame of this document starts from the inlet facilities of the LNG plant through to the offloading arms. The upstream supply of gas is only covered in general terms. NOTE 2: upstream, shipping, regasification and use will be covered in next standards to have the full chain covered. The document covers all facilities associated with producing LNG, including: reception facilities, condensate unit (where applicable), pre-treatment units (including but not limited to acid gas removal, dehydration, mercury removal), LPG extraction and fractionation (where applicable), liquefaction, LNG storage and loading, flare and disposal systems, imported electricity or on-site power generation and other plant utilities and infrastructure (e.g. marine and transportation facilities). The document covers facilities associated with producing other products (e.g. but not limited to domestic gas, condensate, LPG, sulphur, power export) to the extent required to allocate GHG emissions to the different products. The LNG plant is considered “under operation”, including emissions associated with commissioning, initial start-up and restarts after maintenance or upset. The construction and decommissioning phases are excluded. This document covers all GHG emissions associated with producing LNG. These emissions are in scope 1 and scope 2 (scope 3 is excluded except for contracted activities used to produce LNG). Scope 1, 2 and 3 are defined in this document. All emissions sources are covered including flaring, combustion, cold vents, process vents, fugitive leaks and emissions associated with imported energy. Gases to be considered include CO2, CH4, N2O and fluorinated gases. The emissions resulting from boil-off gas management during loading of the ship or any export vehicle are covered. The emissions from a ship at berth are not covered (e.g. mast venting). This document describes the allocation of GHG emissions to LNG where other products are produced (e.g. LPG, domestic gas, condensates, sulphur…). This document defines preferred units of measurement and necessary conversions. This document also recommends instrumentation and estimations methods to monitor and report GHG emissions. Some emissions are measured and some are estimated.
Begin
2025-12-04
WI
00282046
Planned document number
prEN ISO 6338
