Article
Engineering, Chemical
Leila Dehdari, Iris Burgers, Penny Xiao, Kevin Gang Li, Ranjeet Singh, Paul A. Webley
Summary: The increasing global attention towards hydrogen as a green energy carrier is primarily due to environmental concerns related to global warming. The goal of this study was to produce high purity hydrogen from a mixture of hydrogen/natural gas using a bespoke pressure swing adsorption (PSA) cycle, achieving high purity hydrogen product (>99%) with high recovery (>85%) in the 30 bar feed stream.Comparative analysis indicated that the PSA system is competitive, even at a low hydrogen recovery of 40%, particularly when built at a pressure reduction station.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Thermodynamics
Kai Wen, Yangfan Lu, Meitong Lu, Wenwei Zhang, Ming Zhu, Dan Qiao, Fanpeng Meng, Jing Zhang, Jing Gong, Bingyuan Hong
Summary: This paper proposes an optimization method that allows for simultaneous optimization of infrastructure planning and flowrate allocation. By considering operational constraints, the method improves system operation efficiency, reduces costs, and increases the utilization rate of gas storage.
Article
Chemistry, Physical
Xinhong Li, Mingrui Jia, Renren Zhang, Ziyue Han
Summary: This paper simulates and assesses the dispersion of natural gas containing hydrogen released from a transmission pipeline using Computational Fluid Dynamics (CFD). It establishes a 3D CFD model to evaluate the dispersion behavior in a hydrogen-natural gas mixing station. The simulations analyze flammable gas cloud development, assess dangerous areas, and analyze critical factors affecting dispersion behavior. The outcomes are valuable for prior risk assessment and contingency planning.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Shuting Yang, Sara Hastings-Simon, Arvind P. Ravikumar
Summary: The global coal-to-gas transition in the power sector is limited by pipeline availability constraints, with only a small percentage of coal capacity located within 14 km of a nearby pipeline. While coal-to-gas conversion has the potential for emissions reductions, most countries' coal fleets lack access to low-cost natural gas resources, making a global transition unlikely.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Thanh Tuan Nguyen, Kyung-Oh Bae, Park Jaeyeong, Seung Hoon Nahm, Un Bong Baek
Summary: There is no common standard for blended hydrogen use in the natural gas grid. The need for quantitative evaluation of hydrogen-natural gas mixtures to ensure the mechanical performance of pipeline structures is becoming increasingly evident. This study provides experimental data on the effect of H-2 concentration in a methane/hydrogen gas mixture and compares the mechanical performance of three pipeline steels.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Chen Wang, Dengji Zhou, Wang Xiao, Chongyuan Shui, Tao Ma, Peng Chen, Jiarui Hao, Jun Yan
Summary: Hydrogen energy, with its advantages of renewable, clean, and high energy density, is regarded as the most potential secondary energy in the 21st century. However, transportation remains a major constraint on hydrogen development. Injecting hydrogen into the natural gas network for transport is a possible solution, but the differences in properties between natural gas and hydrogen necessitates the establishment of a natural gas pipeline model to explore the influence of hydrogen on pipeline dynamics. The line-pack of the natural gas network plays a crucial role in the system's flexibility and response to external conditions. The study showed that the line-pack affects the dynamic characteristics of the network when hydrogen is injected, with the response speed of hydrogen mixture ratio being faster under low line-pack conditions, benefiting the reduction of hydrogen embrittlement risks.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Cuiwei Liu, Yebin Pei, Zhaoxue Cui, Xuejie Li, Hongchao Yang, Xiao Xing, Pengfei Duan, Luling Li, Yuxing Li
Summary: When blending hydrogen into existing natural gas pipelines, the non-uniform concentration distribution caused by the density difference between hydrogen and natural gas can result in local fluctuations of hydrogen partial pressure. This study investigates the stratification of H2-CH4 in horizontal and undulated pipes through experiments and numerical simulations. The results reveal that hydrogen-methane blending process causes noticeable stratification in stagnant gas situations, and the stratification is influenced by elevation, pressure, hydrogen fraction, etc. It is also important to consider hydrogen-induced stratification even at low flow rates. Therefore, controlling the blended gas to a low-pressure and high-speed situation can help regulate the pressure, speed, and hydrogen fraction.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Shikun Qi, Wei Zhao, Rui Qiu, Chunying Liu, Zhuochao Li, Hao Lan, Yongtu Liang
Summary: Blending hydrogen into the natural gas pipeline network is an efficient approach for storing and delivering renewable energy. However, the variation in gas quality and the diversity of delivery paths can lead to difficulties in pipeline operation management. In this paper, a bilevel optimization model is proposed to analyze the impact of hydrogen blending on pipeline capacity allocation and gas transmission tariffs. The proposed model considers detailed transmission paths and gas calorific values to calculate the actual gas transmission tariffs. The results show that the proposed method facilitates shippers to meet energy demand, achieves fair-cost sharing, and optimally utilizes pipeline capacity allocation.
Article
Chemistry, Physical
Ricardo Moreira dos Santos, Alexandre Szklo, Andra F. P. Lucena, Paulo Emilio V. de Miranda
Summary: Natural gas industry can develop a hydrogen industry based on CO2 capture technology, which can effectively utilize resources, reduce carbon emissions, and facilitate the transition to renewable energy-based hydrogen fuel. A stepwise strategy can be adopted by starting from the idle capacity in the existing natural gas industry to establish an independent supply.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Jianing Yang, Leila Dehdari, Yalou Guo, Jining Guo, Ranjeet Singh, Penny Xiao, Jin Shang, Ali Zavabeti, Gang Kevin Li
Summary: This article presents a design for a deblending process to remove hydrogen from blended gas. The results show that a multiple-bed pressure swing adsorption (PSA) using zeolite 3A can achieve high purity methane products suitable for gas turbines.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Marzia Sesini, Sara Giarola, Adam D. Hawkes
Summary: This paper analyzes the economic feasibility of using strategic storage as a solidarity measure to secure EU energy supply, finding that strategic storage is cost-effective in emergency situations, reducing total costs and liquefied natural gas costs compared to scenarios without strategic storage in place.
Article
Engineering, Industrial
Xiangying Shan, Weichao Yu, Jing Gong, Weihe Huang, Kai Wen, Hao Wang, Shipeng Ren, Di Wang, Yongheng Shi, Chunyue Liu
Summary: This study proposes a methodology to evaluate the gas supply reliability of natural gas pipeline networks, considering the uncertainty of gas supply capacity. The methodology consists of four parts: gas supply capacity calculation model, gas demand prediction model, gas supply calculation model, and gas supply reliability index system. A real natural gas pipeline network in China is used to confirm the feasibility of the methodology, and the results show a significant improvement in gas supply reliability compared to methods that ignore resource uncertainty. The significance of natural gas resources in gas supply reliability is investigated through sensitivity analysis.
RELIABILITY ENGINEERING & SYSTEM SAFETY
(2023)
Article
Energy & Fuels
Ines Bouacida, Jakob Wachsmuth, Wolfgang Eichhammer
Summary: This study assesses the impacts of achieving greenhouse gas neutrality by 2050 in the European Union on the natural gas system, with France and Germany as case studies. The results show that gas supply and demand will undergo radical changes by 2050, requiring significant transformations of the gas infrastructure and leading to an increase in end-user methane price.
ENERGY STRATEGY REVIEWS
(2022)
Article
Chemistry, Physical
Yan Zhao, Brendan Hickey, Shubham Srivastava, Valeriy Smirnov, Vincent McDonell
Summary: The study investigated the effects of adding renewable hydrogen to natural gas on the performance of a surface burner, showing that replacing a portion of natural gas with hydrogen had minimal impact on burner performance parameters without modifying the burner geometry.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Jianlu Zhu, Jun Pan, Yixiang Zhang, Yuxing Li, He Li, Hui Feng, Dongsheng Chen, Yimin Kou, Rui Yang
Summary: This study provides essential information about the diffusion behavior and concentration distribution of underground hydrogen and natural gas mixture leakages through large-scale experimental simulation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Thermodynamics
Muzaffar Ali, Vladimir Vukovic, Mukhtar Hussain Sahir, Daniele Basciotti
APPLIED THERMAL ENGINEERING
(2013)
Article
Construction & Building Technology
Muzaffar Ali, Vladimir Vukovic, Mukhtar Hussain Sahir, Giuliano Fontanella
ENERGY AND BUILDINGS
(2013)
Article
Energy & Fuels
Irfan Ahmad Gondal, Mukhtar Hussain Sahir
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2013)
Review
Green & Sustainable Science & Technology
Mukhtar H. Sahir, Arshad H. Qureshi
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2008)
Article
Economics
Mukhtar H. Sahir, Arshad H. Qureshi
Article
Energy & Fuels
Irfan Ahmad Gondal, Mukhtar Hussain Sahir
INTERNATIONAL JOURNAL OF RENEWABLE ENERGY RESEARCH
(2012)