Carbonate-Free Cement Decarbonization Using Electrochemical Sodium Sulfate Splitting
電気化学的硫酸ナトリウム分解を用いたカーボネートフリーセメント脱炭素化 (AI 翻訳)
Shabdiki B. Chaurasia, Dan R Rourke, Eylul Ergun, Bilen Akuzum, Ertan Agar
🤖 gxceed AI 要約
日本語
本論文は、リチウムイオン電池リサイクルからの廃硫酸ナトリウムを利用し、二酸化炭素を排出しない電解セメント前駆体製造法を提案。PFSA膜を用いた二チャンネル電解槽で、NaOHを高ファラデー効率で生成し、後段の石膏変換により高純度水酸化カルシウムを生成。従来の三チャンネル方式に比べエネルギー効率を約38%に向上させ、廃棄物の価値化と低炭素セメント製造のスケーラブルな経路を示す。
English
This paper presents a carbonate-free electrochemical pathway for cement decarbonization using sodium sulfate waste from lithium-ion battery recycling. A two-channel zero-gap electrolyzer with PFSA membranes achieves >95% Faradaic efficiency for NaOH generation at 50 mA/cm², and a downstream double-displacement reaction yields ~2.5x higher Ca(OH)₂ purity (~90%). The system improves electrochemical energy efficiency from ~11% (prior three-channel CaCO₃ electrolyzer) to ~38%, enabling scalable low-carbon cement manufacturing via waste valorization.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本は世界有数のセメント生産国であり、産業脱炭素化は喫緊の課題。本手法は国内のLIBリサイクル廃棄物とセメント製造の連携可能性を示唆し、資源循環型GXモデルの参考となる。SSBJや有報での排出量削減寄与は限定的だが、長期的な技術オプションとして注目に値する。
In the global GX context
This work addresses a critical global challenge—cement industry decarbonization—by coupling waste valorization (LIB recycling sulfate) with electrochemical production of a cement precursor. It offers a scalable, CO₂-free alternative to traditional carbonate-based electrolysis, with applications in regions like the EU and US where cement emissions are under regulatory pressure (e.g., CSRD, SEC climate rules). The approach also enhances energy efficiency, a key lever for industrial transition finance.
👥 読者別の含意
🔬研究者:Demonstrates a novel electrochemical system for cement decarbonization with improved energy efficiency and waste integration, offering a pathway for further optimization in membrane design and reactor engineering.
🏢実務担当者:Provides a potential route for cement manufacturers to reduce process emissions and valorize waste streams from battery recycling, though scale-up and economic feasibility require further validation.
🏛政策担当者:Highlights a technology option for deep decarbonization of the cement sector, supporting policy frameworks that incentivize industrial electrification and circular waste utilization.
📄 Abstract（原文）
Electrochemical approaches to cement decarbonization commonly rely on calcium carbonate (CaCO 3 ) dissolution in acidic media, which intrinsically generates CO 2 and introduces solids-handling constraints [1]. Here, we present a carbonate-free electrochemical pathway based onsodium sulfate (Na 2 SO 4 ), a prevalent waste stream from lithium-ion battery (LIB) recycling, used in a two-channel, zero-gap electrolyzer coupled with an external gypsum (CaSO 4 ) conversion step to produce calcium hydroxide (Ca(OH) 2 ), a key cement precursor. This architecture decouples solid-phase carbonate conversion from the electrochemical step, shifting the primary electrochemical function to selective NaOH generation. Membrane selectivity and pH-gradient stability were first evaluated in an H-cell configuration, followed by flow-cell operation across multiple current densities and electrolyte volumes. At a representative current density of 50 mA.cm -2 , reinforced PFSA membranes maintained stable acid–base separation and enabled NaOH generation with Faradaic efficiencies exceeding 95%, increasing electrochemical energy efficiency from ~11% in a prior three-channel CaCO 3 electrolyzer to ~38% in the two-channel Na 2 SO 4 salt-splitting system [2]. The downstream double-displacement reaction produced ~2.5x higher Ca(OH) 2 yield with ~90% purity while enabling direct Na 2 SO 4 reuse with minimal performance decay. Electrochemical impedance analysis indicates that system performance is primarily limited by gas bubble disengagement and water transport rather than membrane degradation. Together, these results demonstrate an integrated electrochemical platform that couples sulfate waste valorization with carbonate-free cement precursor production, offering a scalable route toward low-carbon cement manufacturing. References Ellis, L.D., et al., Toward electrochemical synthesis of cement—An electrolyzer-based process for decarbonating CaCO3 while producing useful gas streams. Proceedings of the National Academy of Sciences, 2020. 117 (23): p. 12584-12591. Chaurasia, S., et al., Leveraging Flow-Assisted Electrochemistry to Decarbonize Calcium Hydroxide Production in Cement Manufacturing. Journal of The Electrochemical Society, 2025. 172 (7): p. 073506.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.1149/ma2026-01572758mtgabsfirst seen 2026-07-17 06:10:19
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。