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Molecules ◽  
2022 ◽  
Vol 27 (2) ◽  
pp. 455
Naoya Onishi ◽  
Ryoichi Kanega ◽  
Hajime Kawanami ◽  
Yuichiro Himeda

Recently, there has been a strong demand for technologies that use hydrogen as an energy carrier, instead of fossil fuels. Hence, new and effective hydrogen storage technologies are attracting increasing attention. Formic acid (FA) is considered an effective liquid chemical for hydrogen storage because it is easier to handle than solid or gaseous materials. This review presents recent advances in research into the development of homogeneous catalysts, primarily focusing on hydrogen generation by FA dehydrogenation. Notably, this review will aid in the development of useful catalysts, thereby accelerating the transition to a hydrogen-based society.

2022 ◽  
Vol 13 (1) ◽  
Stephanie Spittle ◽  
Derrick Poe ◽  
Brian Doherty ◽  
Charles Kolodziej ◽  
Luke Heroux ◽  

AbstractDeep eutectic solvents (DESs) are an emerging class of non-aqueous solvents that are potentially scalable, easy to prepare and functionalize for many applications ranging from biomass processing to energy storage technologies. Predictive understanding of the fundamental correlations between local structure and macroscopic properties is needed to exploit the large design space and tunability of DESs for specific applications. Here, we employ a range of computational and experimental techniques that span length-scales from molecular to macroscopic and timescales from picoseconds to seconds to study the evolution of structure and dynamics in model DESs, namely Glyceline and Ethaline, starting from the parent compounds. We show that systematic addition of choline chloride leads to microscopic heterogeneities that alter the primary structural relaxation in glycerol and ethylene glycol and result in new dynamic modes that are strongly correlated to the macroscopic properties of the DES formed.

2022 ◽  
Vol 14 (2) ◽  
pp. 653
Florian Julian Lugauer ◽  
Josef Kainz ◽  
Elena Gehlich ◽  
Matthias Gaderer

Storage technologies are an emerging element in the further expansion of renewable energy generation. A decentralized micro-pumped storage power plant can reduce the load on the grid and contribute to the expansion of renewable energies. This paper establishes favorable boundary conditions for the economic operation of a micro-pump storage (MPS) system. The evaluation is performed by means of a custom-built simulation model based on pump and turbine maps which are either given by the manufacturer, calculated according to rules established in studies, or extended using similarity laws. Among other criteria, the technical and economic characteristics regarding micro-pump storage using 11 pumps as turbines controlled by a frequency converter for various generation and load scenarios are evaluated. The economical concept is based on a small company (e.g., a dairy farmer) reducing its electricity consumption from the grid by storing the electricity generated by a photovoltaic system in an MPS using a pump as a turbine. The results show that due to the high specific costs incurred, systems with a nominal output in excess of around 22 kW and with heads beyond approximately 70 m are the most profitable. In the most economical case, a levelized cost of electricity (LCOE) of 29.2 €cents/kWh and total storage efficiency of 42.0% is achieved by optimizing the system for the highest profitability.

Albert Tarancon ◽  
Vincenzo Esposito ◽  
Marc Torrell Faro ◽  
Marcel Di Vece ◽  
Jae Sung Son ◽  

Abstract This roadmap aims to define the guidelines to maximise the impact of the 3D printing revolution on the next generation of devices for the energy transition. It also outlines the current status, challenges and required advances in Science and Technology for a series of power generation technologies (fuel cells, solar cells, thermoelectric generators and turbomachinery) and energy storage technologies (electrolysers, batteries and supercapacitors). Finally, the roadmap discusses the role of 3D printing in improving the mass and heat transfer to improve the energy efficiency of chemical reactors (CO2 conversion) and novel cooling systems. With this document, the authors intend to provide a valuable tool for researchers, technology developers, and policymakers when defining their strategies for the energy sector's future.

Energy ◽  
2022 ◽  
Vol 239 ◽  
pp. 122207
Harry Mahon ◽  
Dominic O'Connor ◽  
Daniel Friedrich ◽  
Ben Hughes

Nanoscale ◽  
2022 ◽  
Lin Ye ◽  
Yiran Ying ◽  
Dengrong Sun ◽  
Jinli Qiao ◽  
Haitao Huang

Exploring high-activity electrocatalysts for oxygen reduction reaction (ORR) is of great significance for a variety of renewable energy conversion and storage technologies. Here, ultrafine Mo2C nanoparticles assembled in N and...

2022 ◽  
Vol 58 (1) ◽  
pp. 89-92
Alok Kumar ◽  
T. B. Ganesha ◽  
B. P. Mishra ◽  
P. Venkatesan ◽  
Sanjiv Kumar ◽  

Agri-start-ups are developing new products through a value chain, supply chain solutions,packaging, processing systems, infrastructure, warehousing, logistics, protection offoodstuffs, communications, e-commerce, delivery and retail models. The study aims todocument the challenges of Agri-startups working in post-harvest and storage parametersof fruits and vegetables. To get the insight, primary and secondary survey was carried outand data was used to provide suggestions to capture the customer and market. The dataindicated that different units required different temperature range to store a different kindof commodity in their cold storage unit. 86.15 per cent of units were using the backupgenerators. 53.84 per cent of units were getting the commodities directly from farmers,30.76 per cent from traders, 9.24 per cent from both and 6.15 per cent from others. 50.76per cent of units were desired to get low electricity bill and 10.76 per cent of units weredesired to come out of usage of generator whereas 32.3 per cent of units were willing toget both i.e. low electricity bill and without dependency on generator and 6.15 per cent ofunits were willing to reduce other costs like operation cost, maintenance cost etc. 70.76per cent of cold storage units having a cooling tower.

2022 ◽  
Nagmani . ◽  
Ashwani Tyagi ◽  
Sreeraj Puravankara

The growing renewable energy sector worldwide and the depleting resources for the Li-ion battery (LIB) technology in a decade push the case of complementary storage technologies, especially for stationary energy...

2022 ◽  
Vol 334 ◽  
pp. 06011
Mariagiovanna Minutillo ◽  
Viviana Cigolotti ◽  
Giovanni Di Ilio ◽  
Arianna Bionda ◽  
Erik-Jan Boonen ◽  

The maritime transportation sector is one of the main contributors to global emissions of greenhouse gases (GHGs). The International Maritime Organization (IMO) has adopted a strategy to reduce these emissions from international shipping >50% by 2050, compared to 2008’s emissions. Therefore, ship owners need to adopt solutions to bring emissions within these and other future limits by means of environmentally friendly fuels (hydrogen or hydrogen carriers) and high efficiency propulsion technologies (fuel cells). This paper focuses on the replacement of the conventional Diesel genset installed on a hybrid small-size ferry, with an innovative system based on PEMFC technology. A real case scenario is investigated: the total energy/power demand of the vessel is determined basing on a typical operational profile. Then, a preliminary redesign of its powertrain configuration is proposed along with an energy management strategy. The analysis has allowed to define the hydrogen consumption for a daily operation. Finally, different storage technologies involving both compressed and liquefied hydrogen have been considered and compared, in order to identify ship’s weight and space requirements.

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