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20 Mar 2024
Today, we are thrilled to announce the launch of our professional video production services. Do you find yourself admiring the professionally crafted video abstracts in your colleagues' articles? Are you eager to showcase your own cutting-edge research to a broader audience? Do you face challenges in effectively conveying complex knowledge to students in a dynamic and visually appealing way? Now, Encyclopedia MDPI offers all users a complimentary trial to bring your research or knowledge to life! During this stage of testing, our service is completely free. We prioritize user experience and feedback over revenue. Click the following link to apply: Notes: 1. For video production inquiries, kindly provide us with your email address and name in the application form. Upon clicking the "submit" button, our team will promptly reach out to you. 2. We also provide free script-writing service for those who are pressed for time. Simply provide us with your requirements, and we will handle the script development process. Rest assured, you will have the opportunity to review and provide feedback at each stage of the script and video creation process. 3. To access our extensive library of example videos, please navigate to the Encyclopedia Video Section.
Journal Encyclopedia - Peer-Reviewed Content
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Encyclopedia 2024, 4(2), 847-863;

Due to the increasing world population and environmental considerations, there has been a tremendous interest in alternative energy sources. Hydrogen plays a major role as an energy carrier due to its environmentally benign nature. The combustion of hydrogen releases water vapor while it also has a vast industrial application in aerospace, pharmaceutical, and metallurgical industries. Although promising, hydrogen faces storage challenges. Underground hydrogen storage (UHS) presents a promising method of safely storing hydrogen. The selection of the appropriate cushion gas for UHS is a critical aspect of ensuring the safety, efficiency, and reliability of the storage system. Cushion gas plays a pivotal role in maintaining the necessary pressure within the storage reservoir, thereby enabling consistent injection and withdrawal rates of hydrogen. One of the key functions of the cushion gas is to act as a buffer, ensuring that the storage pressure remains within the desired range despite fluctuations in hydrogen demand or supply. This is achieved by alternately expanding and compressing the cushion gas during the injection and withdrawal cycles, thereby effectively regulating the overall pressure dynamics within the storage facility. Furthermore, the choice of cushion gas can have significant implications on the performance and long-term stability of the UHS system. Factors such as compatibility with hydrogen, cost-effectiveness, availability, and environmental impact must be carefully considered when selecting the most suitable cushion gas. The present study provides a comprehensive review of different types of cushion gases commonly used in UHS, including nitrogen, methane, and carbon dioxide. By examining the advantages, limitations, and practical considerations associated with each option, the study aims to offer valuable insights into optimizing the performance and reliability of UHS systems. Ultimately, the successful implementation of UHS hinges not only on technological innovation but also on strategic decisions regarding cushion gas selection and management. By addressing these challenges proactively, stakeholders can unlock the full potential of hydrogen as a clean and sustainable energy carrier, thereby contributing to the global transition towards a low-carbon future.

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