Thesis
EXPERIMENTAL AND TECHNO-ECONOMIC EVALUATION OF THE HYDROGENATION/DEHYDROGENATION OF DIBENZYL TOULUENE IN A MEMBRANE REACTOR TO FACILATAE THE TRANSPORT OF RENEWABLE HYDROGEN
Washington State University
Master of Science (MS), Washington State University
01/2021
DOI:
https://doi.org/10.7273/000004511
Handle:
https://hdl.handle.net/2376/125495
Abstract
Liquid Organic Hydrogen Carriers (LOHC) are gaining interest for the role they can play in facilitating the storage and transport of renewable hydrogen over long distances from areas where renewable energy is inexpensive and abundant to areas with high demand, for example from Australia to Japan. High energy density and ease of handling favor conversion of hydrogen to a hydrogenated organic molecule in liquid form. The hydrogenation/dehydrogenation and transport conditions and processing of LOHC as well as the energy density of the organic carriers must be energetically and economically favorable compared to simply storing/transporting molecular hydrogen (H2), likely under high pressure and/or cryogenic conditions. Dibenzyl toluene as a LOHC can store hydrogen at high capacity with moderate reaction conditions for hydrogenation/dehydrogenation, typically 50 bar and 200 °C for hydrogenation and ambient pressure and 300 °C for dehydrogenation. Despite the moderate temperature and pressure required during this process when performed in conventional reactors, the process is less energy efficient than the existing method adapted currently in industry by compression hydrogen to high pressures. An ambient pressure low temperature hydrogenation process using a membrane reactor is studied here experimentally and, in a techno-economic evaluation based on material- and energy balances. Initial experiments point towards successful hydrogenation of an LOHC in a membrane reactor using metal decorated high performance integral-asymmetric membranes. The techno-economic evaluation showed that by using the membrane reactor energy and cost can be reduced by 47.4% in comparison to the conventional LOHC pressurized reactor, and by 13% in comparison to the compressed hydrogen storage method.
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Details
- Title
- EXPERIMENTAL AND TECHNO-ECONOMIC EVALUATION OF THE HYDROGENATION/DEHYDROGENATION OF DIBENZYL TOULUENE IN A MEMBRANE REACTOR TO FACILATAE THE TRANSPORT OF RENEWABLE HYDROGEN
- Creators
- Abdullah Almutawa
- Contributors
- Peter Pfromm (Advisor)Bernard Vanwie (Committee Member)Su Ha (Committee Member)Di Wu (Committee Member)
- Awarding Institution
- Washington State University
- Academic Unit
- Chemical Engineering and Bioengineering, School of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University
- Number of pages
- 52
- Identifiers
- 99900877038801842
- Language
- English
- Resource Type
- Thesis