Search

This comprehensive study assesses the current state of the hydrogen energy system and investigates its potential to transform the global energy landscape while addressing important concerns about climate change. While hydrogen energy has numerous advantages, including sustainability and cleanliness, it faces substantial challenges in the areas of storage, manufacturing, distribution, infrastructure, safety, and cost. Scholars, lawmakers, business leaders, and the general public must all work together to address these complex issues. The research emphasizes the significance of breakthrough technology and astute government policies for the successful development and widespread deployment of hydrogen energy systems. It highlights that this revolutionary effort cannot be performed in solitude. Public education and enhanced awareness appear to be significant factors in promoting greater acceptance and use of hydrogen energy. Furthermore, the study identifies critical future research objectives. It underlines the importance of enhancing the efficiency, sustainability, safety, and economic feasibility of hydrogen energy systems. The development of new storage systems, superior infrastructure designs, and seamless integration technologies is vital to achieving the full potential of hydrogen energy. Finally, the research presented here gives a critical assessment of the hydrogen energy situation and outlines a roadmap toward a more sustainable and resilient future. The review's conclusions are significant for policymakers, academics, and stakeholders because they provide critical insights into the opportunities and problems associated with realizing the full potential of hydrogen energy. • Critical review of hydrogen for global energy needs and climate change is presented. • Potential applications and characteristics of hydrogen energy are scrutinized. • New technology and regulations are critical to developing hydrogen energy systems. • Acceptance and increased use of hydrogen energy are driven by increased awareness. • Future studies on hydrogen should include sustainability, safety, and feasibility. [ABSTRACT FROM AUTHOR]

This study comprehensively analyzes the effect of high-pressure hydrogen gas on the elastic-plastic fracture toughness, fatigue crack growth rate (FCGR) properties, and the corresponding fracture behavior of Cr–Mo steel in hydrogen stationary vessels. The fracture toughness value under 99 MPa hydrogen pressure significantly reduced by approximately one-third of the value tested in ambient air while FCGRs tested under hydrogen environments at a specified ΔK exhibited an approximate two-order magnitude increase compared to those observed in ambient air. The hydrogen-assisted fracture mechanism, encompassing crack initiation, propagation, and crack arrested, was meticulously examined. The distinct variations in fracture modes with changes in the ΔK range can be attributed to the synergistic interaction of HELP and HEDE mechanisms. Leak before break (LBB) behavior was not satisfied for the hydrogen vessel due to a significant reduction in the fracture toughness of materials when exposed to 99 MPa H 2. • Fracture properties of Cr-Mo steel were evaluated under 99 MPa H 2. • Fracture toughness 99 MPa H 2 decreased significantly by approximately one-third compared to the value tested in ambient air. • Fatigue crack growth rates under 99 MPa H 2 exhibited an approximate two-order magnitude increase. compared to those observed in ambient air. [ABSTRACT FROM AUTHOR]