Reactant Feeding Strategy Analysis of Sodium Borohydride Hydrolysis Reaction Systems for Instantaneous Hydrogen Generation

doi:10.3390/en13184674

機構典藏 > College of Engineering > Graduate Institute & Department of Chemical and Materials Engineering > Journal Article > Item 987654321/119835

Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/119835

Title:	Reactant Feeding Strategy Analysis of Sodium Borohydride Hydrolysis Reaction Systems for Instantaneous Hydrogen Generation
Authors:	Yih‐Hang Chen;Jhih‐Cyuan Lin
Keywords:	sodium borohydride;hydrolysis reaction;hydrogen-on-demand;start-up;feeding strategy
Date:	2020-09-08
Issue Date:	2021-01-07 12:10:15 (UTC+8)
Abstract:	In this study, the operational procedure of an experiment and simulation for a hydrogen-on-demand system using sodium borohydride hydrolysis is proposed. For an isothermal operating condition of a packed-bed reactor, the dynamic response between the input NaBH4 feed (FNaBH4,0(S)) and the output hydrogen flowrate (FH2(S)) of the reactor can be analytically derived and is a first-order transfer function. The time constant of this transfer function is a function of the reciprocal of the product of the reaction rate constant and the catalyst weight into the liquid volume of the reactor. The kinetic parameters of Co-B/IR-200 catalysts are regressed from the experimental NaBH4 hydrolysis reaction. The result shows a 30 °C operating temperature increase (from 40 °C till 70 °C) can shorten the dynamic response time of the hydrogen generation rate by around two-thirds. From theoretical derivation, a feeding strategy which supplies the combination of impulse function and step function of the NaBH4 feed flowrate can produce a hydrogen-on-demand system. However, for real applications, a combined pulse and step function of the NaBH4 feed flowrate is used due to limitations in pump capacity. Hence, a systematic feeding procedure can then be constructed to achieve the US Department of Energy’s fuel cell start-up time target of less than 5 s. to produce hydrogen. Finally, the experiment was set-up to validate the simulation result.
Relation:	Energies 13(18), 4674
DOI:	10.3390/en13184674
Appears in Collections:	[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	137	View/Open

Loading...