Organic Acid–Promoted Hydrolysis of Ammonia Borane under Strained Conditions

Groom, Taylor B.; Drolet, Michael P.; Gabl, Jason R.; Pourpoint, Timothée L.

doi:10.2514/6.2018-4800

Cited by 1 publication

(2 citation statements)

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“…Tests measuring reaction yields and kinetics or hydrogen purity were conducted using a 250 mL gas burette setup similar to that described previously by our group [5]. An approximately 2M stock solution of maleic acid was prepared using each of the water sources listed above, and a fresh ammonia borane solution was prepared immediately before each test also using water from one of these sources.…”

Section: Methodsmentioning

confidence: 99%

“…Building on the literature cited above, previous studies by our group have shown organic acid-promoted hydrolysis of ammonia borane to result in the release of highly pure hydrogen gas that can be used to power proton exchange membrane fuel cells (PEMFCs) [5]. In addition to reporting reaction kinetics, hydrogen yield, and hydrogen purity when using highly pure deionized water, our previous paper presented initial results that indicate low-quality water sources can be used to promote hydrogen release with reaction rates and yields similar to those achieved when using high purity water sources.…”

Section: Introductionmentioning

confidence: 99%

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Portable Power Generation for Remote Areas Using Hydrogen Generated via Maleic Acid-Promoted Hydrolysis of Ammonia Borane

2019

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A significant drawback to ammonia borane as a hydrogen storage material is the production of ammonia gas during hydrolysis. As a possible solution, maleic acid is shown to be capable of fully promoting hydrolysis of ammonia borane while also preventing ammonia release in excess of single digit parts per million. The reaction is shown to be relatively insensitive towards common water contaminants, with seawater, puddle water, and synthetic urine resulting in hydrogen evolution comparable to that observed when using highly pure deionized water. A common cola beverage was also investigated as a potential water source, with results deviating from those observed when using the other water sources. The ability to use low quality water sources presents the option of acquiring water at the point of use, greatly increasing the energy density of the system during transportation. For each of the water sources being used, concentrations of ammonia in the gas products of maleic acid-promoted hydrolysis were found to be less than the lower detection limits of the employed analysis methods. Based on this reaction, a portable hydrogen reactor is reported and shown to be capable of on-demand hydrogen generation sufficient to power a proton exchange membrane fuel cell at varying loads without significant changes in system pressure. The overall power production system has substantial value in scenarios where electrical power is required but there is no access to an established electrical utility, with prime examples including disaster relief and expeditionary military operations.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%