Hydrogen water has recently become a boom, and the interest in hydrogen has been rising also among ordinary people. However, I think that it should be considered to be dealt under one head with various things such for medical use, use relevant to beauty and health supplement. That is to say, when dealing with hydrogen, the levels in the management of the manufacturing process, the confirmation of safe use and the validation of the effectiveness are completely different. There are many common things to which attention should be paid dealing with hydrogen in all the fields. In this paper, I will describe the circumferential situations and the points to note.
Metal hydride alloys can compactly store larger amounts of hydrogen than that possible when hydrogen is stored in a liquid state. These alloys alter the equilibrium pressure of hydrogen by changing its temperature. We developed novel actuation devices, called metal hydride (MH) actuators, and we adopted these MH alloys as thermally controllable pressure generators. The MH actuators provide several unique properties, including a high power-to-weight ratio, softness, noiselessness, and eco-friendliness, that are different from other conventional actuators, such as electric motors, pneumatic actuators, and hydraulic actuators. The purpose of this research is threefold: First, we provide an overview of the properties of MH alloys for human-friendly actuators. Second, we describe the basic structure and characteristics of the MH actuators and their applications to wheelchairs with seat lifters, transfer equipment for toilets, continuous passive motion machines for joint rehabilitation, and portable rescue tools for disaster prevention and preparedness. Finally, we discuss designs to further improve the MH actuators in the future to obtain more suitable devices for assistive technologies and disaster rescue operations.
Since FY2008, Japanese four blast furnace steelmakers and one engineering company have been working on the “CO2 Ultimate Reduction in Steelmaking Process by Innovative Technology for Cool Earth 50 (COURSE50)Project” which is one of national projects commissioned from NEDO aimed at developing drastic new CO2 emissions mitigation technologies from steelworks. Its goal is to mitigate CO2 emissions in the steelmaking process by approximate 30% through the iron ore reducing technology using hydrogen involving coke oven gas to curb CO2 emissions from blast furnaces as well as the CO2 separating and recovery technology from blast furnace gas using unused exhaust heat in steelworks.
To realize the global warming less than two degrees Centigrade, the world needs to attain de-carbonization society. Hydrogen Council is a global industry-lead initiative for advocating hydrogen as a central pillar for energy transition. The Council has issued a report, at the timing of COP23, entitled “Hydrogen scaling up”. In the report, a quantitative vision is described on implementation of hydrogen energy in 2050, possible CO2 reduction capacity, and also economic contributions. The present paper outlines activities and the report of Hydrogen Council.
Recently, ESG investments have been highlighted and expanded drastically. In this paper, the relation between environmental-friendly activities and ESG investments will be discussed by considering SDGs adopted by UN, Paris Agreement for GHGs reduction and RE100 (renewable energy 100%). From these viewpoints, hydrogen energy will be discussed with a new light.
Electrochemical ammonia synthesis using renewable energies has attracted much interests as a potential method to produce ammonia as an energy carrier in future hydrogen economy. The electrochemical process has been performed with various electrolytes such as solid oxide electrolytes, polymer electrolytes, molten salts, and liquid electrolytes. In this review, we summarized cathode and electrolyte materials with categorizing operating temperatures, i.e., low temperature range (R.T.-100℃), intermediate temperature range (100-450℃), and high temperature range (450-700℃), and discussed reaction mechanisms of the electrochemical ammonia synthesis.