Showing 1 - 10 of 10
Hydrogen demand as an energy currency is anticipated to rise significantly in the future, with the emergence of a … hydrogen economy. Hydrogen production is a key component of a hydrogen economy. Several production processes are commercially … other hydrogen production processes. Recent advances in hydrogen production by thermochemical water decomposition are …
Persistent link: https://www.econbiz.de/10010807569
In this paper, energy and exergy analyses of the geothermal-based hydrogen production via thermochemical water …
Persistent link: https://www.econbiz.de/10010807811
) of a dual-fuel diesel engine (H2 (hydrogen)–diesel) using exergy analysis. The maximum available work increased with H2 …
Persistent link: https://www.econbiz.de/10010808407
Temperature–entropy diagrams combined with a pinch point analysis are introduced, providing a vivid and detailed tool to analyse two-step thermochemical water-splitting processes. The impacts of different temperature and pressure conditions, as well as different water conversion rates, are...
Persistent link: https://www.econbiz.de/10010809679
Possibly one of the most significant advantages that hydrogen may have as a fuel is its potential for increased second … hydrocarbon-based fuels. A computational investigation of this effect is pursued for the case of mixtures of hydrogen and natural … function of hydrogen content of the fuel and the operating parameters of the engine. Of particular importance is the …
Persistent link: https://www.econbiz.de/10010810171
Exergy analysis has been shown to be an efficient tool for understanding and improvement of industrial processes. In the present study, exergy analysis has been used to examine the energy consumption of an existing Steam Methane Reforming (SMR) process and then to test for possible savings in...
Persistent link: https://www.econbiz.de/10011046835
Coal gasification is seen as an attractive way for hydrogen production. The main advantage of this approach is the low …, pressure-swing adsorption process for hydrogen separation, combined cycle for power production and essential auxiliary … loss takes place in the gasifier. The overall exergy efficiency of the coal-to-hydrogen system is equal to ca. 57%, while …
Persistent link: https://www.econbiz.de/10011052964
This study deals with solar hydrogen production from the two-step iron oxide thermochemical cycle (Fe3O4/FeO). This … exothermic steam hydrolysis of the reduced metal oxide (wustite) for hydrogen generation. Thermodynamic and experimental … investigations have been performed to quantify the performances of this cycle for hydrogen production. High-temperature decomposition …
Persistent link: https://www.econbiz.de/10011053367
gas), methanol, Fischer–Tropsch fuels, hydrogen, as well as heat and electricity, from several biowastes generated in the … synthesis is preferred when exergetic efficiency is the objective parameter, but hydrogen process is more efficient when the …
Persistent link: https://www.econbiz.de/10011054406
An exergetic analysis has been performed on a gasification-based bio-hydrogen generation system consisting of an ASU … operating parameters on the hydrogen yield and cold gas efficiency. It is observed that, with 95% oxygen in the gasifying agent … and with gasifier equivalence ratio of 4.0, the process generates 107.8 g hydrogen per kg of dry biomass (on ash free …
Persistent link: https://www.econbiz.de/10011055731