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<p>Clean energy alternatives are essential for mitigating the effects of climate change and global warming. Renewable hydrogen (H<sub>2</sub>) is a promising substitute for fossil fuels, offering zero CO<sub>2</sub> emissions. However, its low volumetric energy density poses a significant challenge for efficient storage and transportation. The strategic integration of H<sub>2</sub> storage with decarbonization initiatives has emerged as a viable solution to combat global warming. This review explores the potential sources of renewable H<sub>2</sub> production, storage methods, and applications in the context of decarbonization. Among various approaches, renewable liquid production via catalytic CO<sub>2</sub> hydrogenation—specifically through the reverse water–gas shift (RWGS) reaction, Fischer–Tropsch synthesis (FTS), and methanol synthesis—stands out as one of the most promising pathways. These processes facilitate the storage and transport of renewable H<sub>2</sub> while enabling large-scale industrial applications. The conversion of CO<sub>2</sub> and renewable H<sub>2</sub> into methanol and hydrocarbons not only enhances energy storage efficiency, but also offers significant environmental benefits, contributing to the development of sustainable energy systems. Additionally, this review addresses current technological and economic challenges associated with renewable H<sub>2</sub> and its storage while proposing future research directions. By providing insights into technological feasibility, practical applications, and research perspectives, this review aims to support advancements in decarbonization efforts through renewable hydrogen.</p>

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Hydrogen Production, Storage, and Decarbonization via Heterogenous Catalytic CO2 Hydrogenation

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年4月3日

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  • Muhammad Asif,
  • Wonjoong Yoon,
  • Jiyeon Lee,
  • Jaehoon Kim

摘要

Clean energy alternatives are essential for mitigating the effects of climate change and global warming. Renewable hydrogen (H2) is a promising substitute for fossil fuels, offering zero CO2 emissions. However, its low volumetric energy density poses a significant challenge for efficient storage and transportation. The strategic integration of H2 storage with decarbonization initiatives has emerged as a viable solution to combat global warming. This review explores the potential sources of renewable H2 production, storage methods, and applications in the context of decarbonization. Among various approaches, renewable liquid production via catalytic CO2 hydrogenation—specifically through the reverse water–gas shift (RWGS) reaction, Fischer–Tropsch synthesis (FTS), and methanol synthesis—stands out as one of the most promising pathways. These processes facilitate the storage and transport of renewable H2 while enabling large-scale industrial applications. The conversion of CO2 and renewable H2 into methanol and hydrocarbons not only enhances energy storage efficiency, but also offers significant environmental benefits, contributing to the development of sustainable energy systems. Additionally, this review addresses current technological and economic challenges associated with renewable H2 and its storage while proposing future research directions. By providing insights into technological feasibility, practical applications, and research perspectives, this review aims to support advancements in decarbonization efforts through renewable hydrogen.