China, People’s Republic

The fuel cell electric vehicle (FCEV) is a promising transportation technology for resolving the air pollution and climate change issues in the United States. However a large-scale penetration of FCEVs would require a sustained supply of hydrogen which does not exist now. Water electrolysis can produce hydrogen reliably and sustainably if the electricity grid is clean but the impacts of FCEVs on the electricity grid are unknown. In this paper we develop a com Read More

It is believed that hydrogen will play an essential role in energy transition and achieving the net-zero target by 2050. Currently global hydrogen production mostly relies on processing fossil fuels such as coal and natural gas commonly referred to as grey hydrogen production while releasing substantial amounts of carbon dioxide (CO2). Developing economically and technologically viable pathways for hydrogen production while eliminating CO2 emissions b Read More

Hydrogen-enriched compressed natural gas (HCNG) holds significant promise for renewable energy absorption and hydrogen utilization while also increasing the complexity of Integrated Energy System (IES) structures which presents challenges for optimal HCNG-IES operation. Energy inertia provides IES with potential operational flexibility. However existing HCNG-IES optimization technologies inadequately account for hydrogen and thermal inertia leavi Read More

Underground hydrogen (H2) storage (UHS) and carbon dioxide (CO2) geo-storage (CGS) are prominent methods of meeting global energy needs and enabling a low-carbon global economy. The pore-scale distribution reservoir-scale storage capacity and containment security of H2 and CO2 are significantly influenced by interfacial properties including the equilibrium contact angle (θE) and solid-liquid and solid-gas interfacial tensions (γSL and γSG). Ho Read More

Hydrogen-powered aircraft as a cutting-edge exploration of clean-energy air transportation have more stringent requirements for lightweight hydrogen storage equipment due to the limitations of aircraft weight and volume. Composite hydrogen storage cylinders have become one of the preferred solutions for hydrogen storage systems in hydrogen-powered aircraft due to their light weight and high strength. However during the automated placement Read More

Unlike the typical low-temperature (< 150 °C) continental geothermal systems usually characterized by high N2 CH4 and CO2 concentrations but a trace H2 concentration the sandstone-dominated Jimo hot spring on China's eastern coast exhibits: (1) abnormally high H2 concentrations (2.4–12.5 vol%) and H2/CH4 (up to 46.5); (2) depleted δD-H2 (−822 to −709‰) comparable to the Kansas hot springs near the Mid-Continent rift system with the most deplete Read More

China as both a major energy consumer and the largest carbon emitter globally views carbon capture utilization and storage (CCUS) hydrogen production as a crucial and innovative technology for achieving its dual carbon goals of carbon peaking and carbon neutrality. The development of such technologies requires strong policy guidance making the quantification of policy pathways essential for understanding their effectiveness. This study employs a Read More

In order to realize carbon mitigation and the efficient utilization of waste biogas the biogas-to-methanol process is an important method. The syngas produced by the conventional biogas reforming technology is rich in CO2 and CO whereas it is poor in hydrogen. Therefore additional H2 is introduced into the system to adjusted the syngas ratio promoting the efficient conversion of the biogas. However the use of traditional H2 production technologie Read More

Methanol reforming is considered to be one of the most promising hydrogen production technologies for hydrogen fuel cells. It is expected to solve the problem of hydrogen storage and transportation because of its high hydrogen production rate low cost and good safety. However the strong nonlinearity and slow response of the pressure and temperature subsystems pose challenges to the tracking control of the methanol reforming hydrogen producti Read More

In response to the issues of insufficient flexibility in the operation of hydrogen storage and hydrogen production equipment with poor economic viability when operated independently in the park firstly a comprehensive energy system model for hydrogen storage and power generation which considering the multi-operational conditions of alkaline electrolyzers (ELE) is constructed. This model is integrated into the comprehensive en ergy system of the park a Read More