Ruthenium‐Based Catalysts Supported on Lanthanum and Carbon‐Modified Alumina for Low‐Pressure Ammonia Synthesis
低圧アンモニア合成のためのランタンおよび炭素修飾アルミナ担持ルテニウム系触媒 (AI 翻訳)
Xiang Li, Guandong Wu, Yufei He, Dianqing Li
🤖 gxceed AI 要約
日本語
本研究は、低圧アンモニア合成における水素被毒問題を解決するため、Ru/Al2O3-La-C触媒を開発した。400°C、3MPaの条件下で、未修飾触媒と比較して10倍のアンモニア収率（4.74 mmol NH3·gcat−1·h−1）を達成し、水素反応次数が-0.43から0.58に変化した。Laドープによる活性水素の移動促進と炭素導入による水素脱離モードの制御が鍵である。
English
This study developed a Ru/Al2O3-La-C catalyst to alleviate hydrogen poisoning in low-pressure ammonia synthesis. At 400°C and 3 MPa, it achieved a 10-fold increase in ammonia yield (4.74 mmol NH3·gcat−1·h−1) compared to unmodified catalyst, with hydrogen reaction order shifting from -0.43 to 0.58. La doping facilitates active hydrogen transfer to the support, while carbon modifies hydrogen desorption pathways.
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
日本は水素・アンモニアをエネルギー戦略の柱と位置付けており、低圧合成技術はグリーンアンモニアの製造コスト低減に貢献する。本触媒設計は、水素被毒の克服という実用的課題に新たな知見を提供する。
In the global GX context
Low-pressure ammonia synthesis is critical for hydrogen storage and transport in the global energy transition. This catalyst addresses hydrogen poisoning, a major bottleneck, and offers a new design strategy applicable to green ammonia production.
👥 読者別の含意
🔬研究者:This paper provides a novel catalyst design approach using support modification to overcome hydrogen poisoning in ammonia synthesis.
🏢実務担当者:Chemical companies involved in ammonia production can use these insights to develop more efficient low-pressure catalysts.
📄 Abstract（原文）
ABSTRACT Low‐pressure ammonia synthesis technology holds revolutionary significance in ensuring food security, promoting energy transition, and addressing climate change. However, the hydrogen poisoning of catalysts has long restricted the development of low‐pressure ammonia synthesis processes. Focusing on the regulation of support surface properties, this study successfully prepared a Ru/Al 2 O 3 ‐La‐C catalyst. By regulating the transfer and desorption pathways of hydrogen on the catalyst surface, the hydrogen poisoning phenomenon under low‐pressure conditions was effectively alleviated. Under the reaction conditions of 400°C and 3 MPa, the ammonia synthesis yield of the Ru/Al 2 O 3 ‐La‐C catalyst reached 4.74 mmol NH 3 ·g cat −1 ·h −1 , which was 10 times higher than that of the unmodified Ru/Al 2 O 3 catalyst. Meanwhile, the reaction order of hydrogen changed from −0.43 to 0.58, and the reaction order of nitrogen changed from 0.98 to 0.44, further confirming that the hydrogen poisoning issue of the catalyst was significantly improved and the activation of nitrogen was promoted. Characterization results from H 2 ‐TPD and H‐D exchange experiments showed that La doping constructed La‐O sites, which facilitated the transfer of active hydrogen from the active component Ru to the support. In contrast, the introduction of carbon regulated the recombination and desorption mode of hydrogen on the surface of metallic Ru, prompting hydrogen to desorb in the form of H 2 instead of forming H 2 O. This study provides a new insight for the design and development of catalysts for low‐pressure ammonia synthesis.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1002/cbh2.70063first seen 2026-05-17 05:51:22
🔔 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。