China, People’s Republic
Progress in Carbon Capture and Impurities Removal for High Purity Hydrogen Production from Biomass Thermochemical Conversion
Nov 2024
Publication
Renewable hydrogen production from biomass thermochemical conversion is an emerging technology to reduce fossil fuel consumptions and carbon emissions. Biomass-derived hydrogen can be produced by pyrolysis gasification alkaline thermal treatment etc. However the removal of impurities from biomass thermochemical conversion products to improve hydrogen purity is currently technical bottleneck. It is important to assess and investigat Read More
Optimizing Hydrogen Production for Sustainable Fuel Cell Electric Vehicles: Grid Impacts in the WECC Region
Jan 2025
Publication
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
Optimizing Flexibility and Low-carbon Emissions in Integrated Energy Systems: A Two-stage Robust Optimization Model Invrporating Hydrogen and Carbon Trading
Jan 2025
Publication
Source-load output uncertainty poses significant risks to the stable operation of Integrated Energy Systems (IESs). To ensure safe and stable system operation while optimizing the balance among robustness economic viability and low-carbon emissions this paper presents a two-stage robust optimal scheduling model for IESs. This model is supported by hydrogen-containing electric dual-energy conversion characteristics under source-load unc Read More
Hydrogen Production in Integration with CCUS: A Realistic Strategy towards Net Zero
Jan 2025
Publication
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 Production Efficiency: A Critical Factor in Integrated Planning of Distributed and Transmission System for Large-scale Centralized Offshore Wind-hydrogen System
Dec 2024
Publication
Green hydrogen plays a pivotal role in decarbonizing our energy system and achieving the Net-Zero Emissions goal by 2050. Offshore wind farms (OWFs) dedicated to green hydrogen production are currently recognized as the most feasible solution for scaling up the production of cost-effective electrolytic hydrogen. However the cost associated with distribution and transmission systems constitute a significant portion of the total cost in the large-scal Read More
Optimization Operation Method for Hydrogen-compressed Natural Gas-Integrated Energy Systems Considering Hydrogen-Thermal Multi-Energy Inertia
Dec 2024
Publication
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
A Two-Stage Robust Optimization Strategy for Long-Term Energy Storage and Cascaded Utilization of Cold and Heat Energy in Peer-to-Peer Electricity Energy Trading
Jan 2025
Publication
This study addresses the optimization of urban integrated energy systems (UIESs) under uncertainty in peer-to-peer (P2P) electricity trading by introducing a two-stage robust optimization strategy. The strategy includes a UIES model with a photovoltaic (PV)–green roof hydrogen storage and cascading cold/heat energy subsystems. The first stage optimizes energy trading volume to maximize social welfare while the second stage maximizes operational pro Read More
Assessment of Wettability and Rock-fluid Interfacial Tension of Caprock: Implications for Hydrogen and Carbon Dioxide Geo-storage
Mar 2022
Publication
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
Long-Duration Energy Storage: A Critical Enabler for Renewable Integration and Decarbonization
Jan 2025
Publication
This paper focuses on the critical role of long-duration energy storage (LDES) technologies in facilitating renewable energy integration and achieving carbon neutrality. It presents a systematic review of four primary categories: mechanical energy storage chemical energy storage electrochemical energy storage and thermal energy storage. The study begins by analyzing the technical advantages and geographical constraints of pumped hydro energy stora Read More
Exploration of Processability Limitations of Fiber Placement and Thickness Stacking Optimization of Thermoplastic Composite Hydrogen Storage Cylinders for Hydrogen-powered Aircraft
Dec 2024
Publication
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
Techno-Economic Assessment of a Grid-Independent Hybrid Power Plant for Co-Supplying a Remote Micro-Community with Electricity and Hydrogen
Aug 2021
Publication
This study investigates the techno-economic feasibility of an off-grid integrated solar/wind/hydrokinetic plant to co-generate electricity and hydrogen for a remote micro-community. In addition to the techno-economic viability assessment of the proposed system via HOMER (hybrid optimization of multiple energy resources) a sensitivity analysis is conducted to ascertain the impact of ±10% fluctuations in wind speed solar radiation temperature and water ve Read More
Origin and Evolution of Hydrogen-rich Gas Discharges from a Hot Spring in the Eastern Coastal Area of China
Jan 2020
Publication
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
Brief Review of Hydrocarbon-reforming Catalysts Map for Hydrogen Production
Jun 2023
Publication
Hydrogen energy the cleanest fuel presents extensive applications in renewable energy technologies such as fuel cells. However the transition process from carbon-based (fossil fuel) energy to desired hydrogen energy is usually hindered by inevitable scientific technological and economic obstacles which mainly involves complex hydrocarbon reforming reactions. Hence this paper provides a systematic and comprehensive analysis focusing on the hydrocar Read More
Evaluation of Regional and Temporal Dynamics in CCUS-Hydrogen Development Pathways: A Data-driven Framework
Dec 2024
Publication
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
A Review of LCA Studies on Marine Alternative Fuels: Fuels, Methodology, Case Studies, and Recommendations
Jan 2025
Publication
Life Cycle Assessment (LCA) methodology can be used to quantitatively assess the greenhouse gas emissions of low- or zero-carbon marine alternative fuels throughout their life cycle (from well to wake) and is an important basis for ensuring a green energy transition in the shipping industry. This paper first clarifies the trends and requirements of low-carbon development in shipping and introduces the major ship emission reduction technologies and e Read More
Techno-Economic Assessment of Biogas-to-Methanol Processes Coupled with Low-Carbon H2 Production Technologies
Jan 2025
Publication
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
Economic Analysis of Supply Chain for Offshore Wind Hydrogen Production for Offshore Hydrogen Refueling Stations
Jan 2025
Publication
In order to solve the problem of large-scale offshore wind power consumption the development of an offshore wind power hydrogen supply chain has become one of the trends. In this study 10 feasible options are proposed to investigate the economics of an offshore wind hydrogen supply chain for offshore hydrogen refueling station consumption from three aspects: offshore wind hydrogen production storage and transportation and application. The st Read More
Internal Model Control for Onboard Methanol-Reforming Hydrogen Production Systems
Jan 2025
Publication
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
Comparative Assessment of Hydrogen and Methanol-Derived Fuel Co-Combustion for Improved Natural Gas Boiler Performance and Sustainability
Jan 2025
Publication
Faced with a global consensus on net-zero emissions the use of clean fuels to entirely or substantially replace traditional fuels has emerged as the industry’s primary development direction. Alcohol–hydrogen fuels primarily based on methanol are a renewable and sustainable energy source. This research focuses on energy sustainability and presents a boiler fuel blending system that uses methanol–hydrogen combinations. This system uses the boiler’s wast Read More
Two-stage Operation Optimization Strategy of Park Integrated Energy System Cluster Coupled with Hydrogen Energy Storage
Jan 2025
Publication
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
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