既存および次世代液化施設の脱炭素化経路：排出源・介入選択肢・レトロフィット制約の包括的分析

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:設計制約を脱炭素化経路の決定変数として扱う枠組みは、資産レベルの移行可能性研究に応用できる。

🏢実務担当者:自施設の排出インベントリを分解し、運用・計測介入を先行させる順序設計の参考になる。

🏛政策担当者:メタン計測体制の整備が削減の前提となる点は、規制・報告制度設計の論点を提供する。

Liquefaction facilities are large point sources of carbon dioxide and, through the wider supply chain in which they sit, significant contributors of methane. Decarbonisation commitments now extend across the sector, and the interventions available to a facility differ sharply according to whether it is being designed or has been operating for twenty years. This paper analyses the pathways available to each, organised around the argument that the decisive variable is not the technical availability of an intervention but whether the facility was configured to accept it. Four positions are developed. First, the emission inventory of a liquefaction facility divides into combustion, process, methane and imported energy components whose relative magnitudes differ enough between facilities that a general prescription is unsound and a facility-specific inventory is the prerequisite for any pathway. Second, where combustion dominates the inventory, which is the common but not the universal case, the intervention with the largest potential effect on that component is the substitution of the refrigeration driver energy source, and its feasibility is determined by grid availability and by turbine hall configuration, both of which are effectively fixed at design. Third, methane reduction is argued to offer a favourable ratio of emission benefit to capital cost in the near term, on the reasoning that the measures are largely maintenance and operational rather than capital and that the emissions represent recoverable product; this is an analytical expectation rather than a costed result, and it is constrained principally by measurement rather than by abatement technology, since a facility cannot reduce what it cannot locate. Fourth, carbon capture is technically available and its application to liquefaction is favoured by the presence of a concentrated acid gas removal stream, which distinguishes this sector from most industrial capture applications and which is systematically underexploited. The paper reports no emission figures and no levelised costs, and its comparative rankings should be read as propositions for a facility to test against its own inventory and cost base rather than as findings. It closes on the sequencing question, arguing that operational and measurement interventions should precede capital ones because they are cheap, fast and generate the information the capital decisions require.

• semanticscholar https://gjetr.ep-journals.org/index.php/gjetr/article/download/105/80first seen 2026-09-23 05:38:18 · last seen 2026-09-28 05:42:49