Molten GaBi catalyst for low-carbon, cost-effective hydrogen via moderate- temperature methane pyrolysis
低温メタン熱分解による低炭素・低コスト水素製造のための溶融GaBi触媒 (AI 翻訳)
Junseok Song, Hosik Hahn, Sunghun Kwak, Dongwook Oh, C S Kim, Young‐Woon Byeon, Jeong Woo Han, Sangwook Park
🤖 gxceed AI 要約
日本語
溶融GaBi触媒を用いて500–800°CでCO2フリー水素製造を実現。Ga0.11Bi0.89合金は活性化エネルギー67.2 kJ/molと低く、800°Cで158時間安定運転。経済性・環境性は水電解法を上回る。
English
A molten GaBi catalyst enables CO2-free hydrogen production at 500–800°C, with the Ga0.11Bi0.89 alloy showing low activation energy (67.2 kJ/mol) and stable operation for 158 h. A 552 ton H2/day plant achieves superior economic and environmental feasibility over water electrolysis.
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
本技術は日本の水素基本戦略に資する可能性がある。SSBJなどの開示基準とは直接関係しないが、低炭素水素供給の選択肢として注目される。
In the global GX context
This molten catalyst lowers the temperature for methane pyrolysis, improving economic viability for CO2-free H2 production—relevant to global hydrogen decarbonization efforts.
👥 読者別の含意
🔬研究者:Provides a novel catalyst design approach for low-temperature methane pyrolysis with long-term stability.
🏢実務担当者:Shows potential cost reduction in hydrogen production using molten catalysts; useful for assessing alternative low-carbon H2 technologies.
🏛政策担当者:Offers evidence for supporting methane pyrolysis as a competitive low-carbon hydrogen pathway alongside electrolysis.
📄 Abstract（原文）
Methane pyrolysis is a promising method for CO 2 -free H 2 production. While conventional solid catalysts suffer from deactivation due to carbon product deposition, molten metal catalysts offer continuous operation for long-term stability by allowing carbon to float on the liquid surface. However, they typically require extreme temperatures above 900 °C to achieve a sufficient H 2 product yield, necessitating the development of catalysts with high activity at lower temperatures. Herein, we present a molten GaBi catalyst that is effective for methane pyrolysis at moderate temperatures of 500–800 °C. The Ga 0.11 Bi 0.89 alloy exhibited the lowest activation energy (67.2 kJ/mol) among reported molten catalysts and maintained stable hydrogen production for 158 h at 800 °C. Ab initio molecular dynamics calculations verified that the exceptional performance originates from the simultaneous suppression of Ga Ga aggregation (coordination number of 0.77) and enhancement of Ga mobility (diffusivity of 0.845 ± 0.012 cm 2 s −1 ). The 552 ton H 2 /day pyrolysis plant with the presented catalyst demonstrated superior economic and environmental feasibility compared to water electrolysis, achieving a net-negative environmental impact, a 80.7% reduction in total installed cost, and an 79.1% decrease in operating cost. The results provide critical insights that advance the design of efficient molten catalysts for methane pyrolysis. • Molten GaBi catalyst enables CO 2 -free H 2 production at 500–800 °C. • The Ga 0.11 Bi 0.89 alloy exhibited an activation energy of 67.2 kJ/mol. • Stable operation for 158 h was observed at 800 °C in a bubble column reactor. • Simulations revealed the suppression of Ga Ga aggregation and enhanced Ga mobility. • 552 ton H 2 /day plant achieved superior economic and environmental feasibility.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.cej.2026.177345first seen 2026-05-17 05:58:49
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