Abstract
The hydrogen production energy efficiency is studied based on the energy profitability coefficient. A model for calculating the energy profitability, known as energy returned on energy invested (EROEI), which can be used in analyzing different production, storage and transport options for a number of hydrogen processing technologies, is proposed. It is shown, based on the performed calculations, that the energy expenditures for hydrogen production make 154—614% of its chemical energy depending on the production, storage and transportation methods, which corresponds to EROEI = 0.651--0.163 and characterizes hydrogen as an energy-unprofitable energy carrier. A review of the literature is carried out, and possible options of setting up energy-efficient production of hydrogen are presented, which rest on using energy-cheap energy sources. Renewable energy sources, as well as electricity from nuclear and thermal power plants, may become such sources for electrolytic hydrogen production. Energy-saving hydrogen production lines are presented involving the use of an intensive energy saving methodology, in which the produced hydrogen is accompanied by significant energy-saving effects in combining its production with metallurgical production. Hydrogen production by means of conversion methods using rejected secondary energy resources is analyzed taking as examples the use of converter waste gases from steelmaking production and an oil refinery. The effects from using hydrogen in motor vehicles, in the power industry, and in the metallurgical industry are considered. The hydrogen utilization energy efficiency coefficient is proposed, which is defined as the ratio of saving the specific fuel consumption in using hydrogen to the energy expenditures for its production. An example of the energy efficient use of hydrogen in thermal treatment of steel is presented in which the energy-saving effect of its use is 4.73 times greater than the cost of obtaining it.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
