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Delft University of Technology

1. Burgers, Iris (author). Novel Technology for Hydrogen Separation from Natural Gas using Pressure Swing Adsorption.

Degree: 2020, Delft University of Technology

Australia has a high potential for production of renewable energy, such as wind and solar. Due to the stochastic operating conditions, excessively produced energy can be used to produce hydrogen by electrolysis to store the energy, known as power-to-gas. This hydrogen can be injected into the existing natural gas pipeline network, providing both storage and transport of hydrogen. There are many applications for hydrogen, however, this thesis focuses on the use of hydrogen for fuel cell cars. In order to use the hydrogen blended with the natural gas, a gas separation is required. Pressure swing adsorption is a commonly used technology to produce pure hydrogen, which exploits the adsorption of gases at high partial pressures. In this thesis, a PSA system is designed to separate a feed of 5 vol% and 10 vol% hydrogen mixed with natural gas at a pressure of 20 bar, and the economic feasibility of hydrogen supplied by a PSA system at a refuelling station is assessed and compared with other alternatives. The PSA separation is achieved with a 6 bed system, which consists of 4 pressure equalisation steps, to increase the product recovery, and repressurises the bed with the pure hydrogen product, to increase the purity. The adsorbent material is key in the design of a PSA system, which determines the operation performance and cost. Due to the large amount of gas components present in natural gas, a three-layered bed is designed. Activated carbon is selected as the main adsorbent layer, adsorbing methane, which is the main component in the gas mixture. Heavy hydrocarbons and CO2 adsorb very strongly on activated carbon; therefore, a pre-layer of silica gel is used to prevent accumulations of these gases. Silica gel has a linear isotherm for heavy hydrocarbons and CO2, which means the gas components will desorb at the desorption pressure. Lastly, a zeolite LiLSX layer is used for the adsorption of nitrogen. Process simulations are performed, focusing on the thickness of the pre-layer. No pre-layer results in accumulations of the heavy hydrocarbons on the activated carbon main layer, and thus reduces the available sites for methane to adsorb. This results in a low purity hydrogen product. When the pre-layer is too long, the total amount of activated carbon is reduced, and thus not enough adsorbent is available for the methane to adsorb. A thickness of 0.2 meter in a bed of 1.2 meter height is concluded to be ideal. It is concluded that an economically feasible design for a refuelling station with hydrogen supplied by a PSA system is proposed. Hydrogen can be dispensed to a fuel cell vehicle in the best case scenario for 14.79 with hydrogen originally produced by electrolysis, and for 12.14 for hydrogen originally produced by SMR without CCS. The final hydrogen price (including hydrogen supply, compression, storage, and dispensing) is compared to two other hydrogen supply methods: on-site electrolysis and tube-trailer transported hydrogen. Currently, PSA supplied hydrogen is a more economical option, especially if the hydrogen… Advisors/Committee Members: Goetheer, E.L.V. (mentor), Webley, Paul (mentor), Xiao, Penny (mentor), de Jong, W. (graduation committee), Ramdin, M. (graduation committee), Delft University of Technology (degree granting institution), University of Melbourne (degree granting institution).

Subjects/Keywords: Hydrogen; Pressure swing adsorption; Hydrogen refuelling station

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Burgers, I. (. (2020). Novel Technology for Hydrogen Separation from Natural Gas using Pressure Swing Adsorption. (Masters Thesis). Delft University of Technology. Retrieved from http://resolver.tudelft.nl/uuid:a1ff79ef-2d91-4b57-a7e2-dcedeae2f8c3

Chicago Manual of Style (16th Edition):

Burgers, Iris (author). “Novel Technology for Hydrogen Separation from Natural Gas using Pressure Swing Adsorption.” 2020. Masters Thesis, Delft University of Technology. Accessed January 16, 2021. http://resolver.tudelft.nl/uuid:a1ff79ef-2d91-4b57-a7e2-dcedeae2f8c3.

MLA Handbook (7th Edition):

Burgers, Iris (author). “Novel Technology for Hydrogen Separation from Natural Gas using Pressure Swing Adsorption.” 2020. Web. 16 Jan 2021.

Vancouver:

Burgers I(. Novel Technology for Hydrogen Separation from Natural Gas using Pressure Swing Adsorption. [Internet] [Masters thesis]. Delft University of Technology; 2020. [cited 2021 Jan 16]. Available from: http://resolver.tudelft.nl/uuid:a1ff79ef-2d91-4b57-a7e2-dcedeae2f8c3.

Council of Science Editors:

Burgers I(. Novel Technology for Hydrogen Separation from Natural Gas using Pressure Swing Adsorption. [Masters Thesis]. Delft University of Technology; 2020. Available from: http://resolver.tudelft.nl/uuid:a1ff79ef-2d91-4b57-a7e2-dcedeae2f8c3

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