アラブ首長国連邦におけるセメント生産の脱炭素経路に関するライフサイクル分析

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

🔬研究者:ガス焚きキルンという過少研究の構成で、複数緩和レバーの感度を切り分けた再現可能なLCA枠組みを提供する。

🏢実務担当者:セメント・建設企業のScope1削減計画において、CCSと燃料転換の組合せが最大効果を持つことを投資判断に反映できる。

🏛政策担当者:産業脱炭素政策は単一施策でなくCCS・再エネ・代替燃料の協調的支援パッケージとして設計すべきと示唆する。

Cement production is a major source of global greenhouse gas emissions and a hard-to-abate sector because of energy-intensive kiln operations and process emissions from limestone calcination. Decarbonizing the cement industry is critical to the United Arab Emirates' net-zero objectives amid growing construction demand. This study examines the cradle-to-gate life-cycle greenhouse gas emissions associated with cement production in the UAE using GREET R&D. The focus is on gas-dominated kiln systems, a configuration underrepresented in existing literature dominated by coal-based production contexts. The functional unit is 1 ton of cement produced, with impacts evaluated using GWP metrics. A natural gas-based Ordinary Portland Cement pathway forms the baseline with emissions of 875.97 kg CO2 eq/t cement produced. A parametric approach isolates three mitigation levers: electricity transition, kiln fuel substitution (including renewable natural gas and alternative fuels), and post-combustion carbon capture, with combined scenarios considering increasing deployment complexity. Results indicate that electricity decarbonization reduces emissions by 2-6%, reflecting electricity's relatively small share of total cement emissions. Kiln fuel substitution shows variable performance, with most configurations providing marginal reductions. Carbon capture delivers the largest impact, achieving above 30% reductions when applied to combined process and combustion emissions, in line with International Energy Agency assessments of cement decarbonization pathways. A combined scenario integrating renewable electricity, alternative fuels, and carbon capture reduces emissions to 512.18 kg CO2 eq/t cement produced and a 41.6% reduction relative to baseline. Decarbonization of the sector, therefore, requires coordinated multi-lever deployment rather than a single intervention strategy. This study combines parametric and scenario-based analysis. The work delivers a reproducible, regionally grounded framework to support industrial decarbonization planning in energy-exporting, hard-to-abate sectors.

• semanticscholar https://doi.org/10.2118/235990-msfirst seen 2026-11-05 05:49:14 · last seen 2026-11-06 05:22:43