Thermodynamics of Hydrogen Energy Storage
Team EveryEng
Mechanical Engineering
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Thermodynamics of Hydrogen Energy Storage
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(44 reviews)
Team EveryEng
Mechanical Engineering
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Course duration
220 Min
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English
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Thermodynamics of Hydrogen Energy Storage
7 Lectures
220 min
Fundamentals of Metal hydrides for Solid State Hydrogen Storage Part -1
27 min
Fundamentals of Metal Hydrides for Solid State Hydrogen Storage Part -2
30 min
Different Types of Hydrides for Hydrogen Storage
41 min
Tailoring Metal Hydrides for Practical Applications: Nanostructure Part 1
35 min
Tailoring Metal Hydrides for Practical Applications: Nanostructure Part 2
28 min
MH System Design and Experimental Facilities on Solid State Hydrogen Storage
42 min
Tutorial - 6 ( MH systems design)
17 min
Course details
The course will comprehensively cover all the aspects of the hydrogen energy value chain including production methods from hydrocarbons & renewables, separation & purification, storage, transportation & distribution, refueling, utilization in various sectors, associated energy conversion devices, sensing and safety. Technical comparisons of various processes and technologies, economic aspects & cost analysis, regulations, codes and standards, global status and future directions will be discussed.
Prof. Pratibha Sharma, Department of Energy Science and Engineering (DESE), IIT Bombay,
Source : NPTEL
Other courses referred here by same Trainer with relative content are:
· Hydrogen Energy Introduction
· Hydrogen Energy Reformation
· Hydrogen Energy Production
· Hydrogen Energy Separation and purification methods
· Role of components in Hydrogen Electrolyzer
· Introduction to Hydrogen Energy Storage
· Hydrogen Energy Compression and storage
· Hydrogen Energy Liquefaction and Storage
· Transportation of Hydrogen Energy
· Uses of Hydrogen Energy
· Hydrogen Energy: Safety
Course suitable for
Oil & Gas Energy & Utilities Chemical & Process Metallurgy & Material Science
Key topics covered
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Questions and Answers
A: Several thermodynamic models predict hydrogen uptake/release, including the Van't Hoff equation for equilibrium pressures, P-C-T isotherms, and first-principles calculations like Density Functional Theory (DFT) to estimate enthalpy and entropy. The Sieverts' law models hydrogen solubility in metals. These models help screen materials, optimize working conditions, and design efficient storage systems. Combining experimental data with modeling enhances prediction accuracy. For advanced modeling techniques, see 'Modeling thermodynamics of hydrogen storage materials' by Bowman et al., https://doi.org/10.1016/j.ijhydene.2005.03.059.
A: Gibbs free energy (ΔG) determines the spontaneity of hydrogen absorption/desorption reactions at given temperature and pressure. Negative ΔG indicates the hydride formation is thermodynamically favorable, while positive ΔG favors hydrogen release. By analyzing ΔG, scientists identify suitable operating conditions and materials that can store and release hydrogen efficiently. Additionally, ΔG relates to equilibrium pressure via the equation ΔG = -RT ln(P_eq), linking thermodynamic behavior directly to practical performance. More details can be found in 'Thermodynamic evaluation of hydrogen storage materials' by Zaluska et al., https://doi.org/10.1016/S0921-4526(01)00999-4.
A: Entropy change (ΔS) reflects the disorder difference between reactants and products in hydrogen storage reactions. Positive entropy change usually corresponds to hydrogen gas formation (gas state is more disordered), favoring desorption at higher temperatures. The interplay of enthalpy and entropy governs Gibbs free energy (ΔG = ΔH - TΔS), determining reaction feasibility at different temperatures. Thus, entropy is essential for predicting temperature dependence and tailoring materials for efficient cycling. Further explanation can be found in 'Thermodynamics of hydrogen-metal systems: role of entropy' by Reilly and Wiswall, https://doi.org/10.1016/0360-3199(79)90005-2.
A: Yes, thermodynamic inefficiencies in hydrogen storage processes can lead to increased energy consumption, often derived from fossil fuels, indirectly increasing greenhouse gas emissions. High energy requirements for compression, liquefaction, or chemical storage regeneration reduce the overall environmental benefits of hydrogen. Selecting thermodynamically favorable materials and optimizing operating conditions minimize these impacts. Moreover, recycling storage materials and using renewable energy sources improve sustainability. For environmental assessments, see 'Life cycle and thermodynamic analysis of hydrogen storage technologies,' https://doi.org/10.1016/j.rser.2016.01.097.
A: Thermodynamic properties such as enthalpy, entropy, and reaction Gibbs free energy dictate storage stability, capacity, and operating conditions. Physical methods like compressed or liquid hydrogen storage rely on phase changes or pressure-volume relationships, whereas chemical methods involve energy-storing chemical bonds (e.g., hydrides). Chemical storage often offers higher volumetric density but requires specific temperature and pressure conditions governed by reaction thermodynamics for hydrogen release and uptake. Thus, thermodynamic considerations influence safety, efficiency, and suitability for given applications. For a comprehensive comparison, see 'Physical vs. Chemical Hydrogen Storage: Thermodynamic Considerations' by Sandrock et al., https://doi.org/10.1016/j.ijhydene.2004.04.004.
A: Yes, hydrogen liquefaction involves cooling hydrogen gas below its critical temperature (around 20.3 K), requiring significant energy input due to the large enthalpy change. The main thermodynamic limitation is the low temperature and associated high refrigeration work, which reduces overall energy efficiency. Additionally, boil-off losses occur due to imperfect insulation. Efficient liquefaction systems aim to optimize thermodynamic cycles (e.g., Claude or Brayton) to minimize energy consumption. For further reading, see the review 'Hydrogen liquefaction: A review of thermodynamics, processes, and technologies' by Larminie and Dicks, available at https://doi.org/10.1016/j.ijhydene.2018.09.103.
A: Pressure is a critical variable influencing the hydrogen chemical potential. According to Le Chatelier's principle and thermodynamic equilibrium, increasing hydrogen pressure generally promotes absorption (hydrogen storage) by shifting the reaction equilibrium toward hydride formation. Conversely, reducing pressure drives desorption. The pressure dependence is quantitatively captured by the Van't Hoff equation, linking pressure, temperature, and reaction spontaneity. Controlling pressure allows precise tuning of storage and release conditions. For detailed explanations, the article 'Hydrogen storage thermodynamics in metal hydrides' at https://www.sciencedirect.com/science/article/pii/S036031991931680X provides an in-depth analysis.
A: Temperature directly impacts the equilibrium pressure of hydrogen absorption and desorption via the Van't Hoff relationship, which relates the change in equilibrium pressure with temperature to changes in enthalpy and entropy of the reaction. As temperature increases, desorption is generally favored due to the endothermic nature of hydrogen release. Conversely, absorption is favored at lower temperatures. This thermodynamic interplay defines operating windows for hydrogen storage materials. Effective design requires selecting materials whose thermodynamic properties suit the desired temperature range. For more on this, see 'Thermodynamics of hydrogen storage in metal hydrides' by Bowman et al., https://doi.org/10.1016/S0360-3199(98)00056-4.
A: The main thermodynamic challenges include achieving a balance between hydrogen storage capacity, operating temperature, and pressure. Metal hydrides must have favorable enthalpy of hydride formation—if too high, it requires excessive heat to release hydrogen; if too low, hydrogen desorbs at ambient conditions, causing leakage issues. Additionally, cycling stability and kinetics are affected by thermodynamics. For example, some hydrides require high temperatures for hydrogen release, reducing efficiency. Optimizing these parameters is crucial for practical hydrogen storage. A comprehensive discussion can be found in 'Hydrogen storage materials: The characterization of their thermodynamics and kinetics' by Sandrock, https://doi.org/10.1016/j.ijhydene.2008.10.014.
A: Certainly! Hydrogen energy storage primarily relies on the reversible chemical reactions involving hydrogen and other substances. The key thermodynamic principles include enthalpy, entropy, and Gibbs free energy changes during hydrogen absorption and release. In practical systems, hydrogen can be stored as compressed gas, liquid, or within chemical hydrides. The energy required to store and retrieve hydrogen depends on these thermodynamic properties. For example, metal hydrides absorb hydrogen exothermically, releasing heat, and desorb hydrogen endothermically, requiring heat input. Understanding these properties helps improve storage efficiency and select suitable materials. For more detailed thermodynamics, see the review by Züttel et al. (2003) at https://doi.org/10.1016/j.ijhydene.2003.08.015.
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