Site items in: Cracking Ammonia

Presentation

Ammonia Decomposition and Separation Using Catalytic Membrane Reactors

Sai P. KatikaneniStephen N. PaglieriAadesh X. HaraleAqil JamalKoichi EguchiHiroki MuroyamaToshiaki Matsui

Hydrogen is the primary fuel source for fuel cells. However, the low volume density and difficulty in storing and transporting hydrogen are major obstacles for its practical utilization. Among various hydrogen carries, ammonia is one of the most promising candidates because of its high hydrogen density and boiling point and ease in liquefaction and transportation. The reaction temperature of ammonia cracking into nitrogen and hydrogen is about 500˚C or higher. The hydrogen can be effectively separated by the membrane based on Pd alloy about 500˚C. Currently, the extraction of hydrogen from ammonia is carried out by two step process involving…

High Flow Ammonia Cracking between 400-600°C
Presentation

High Flow Ammonia Cracking between 400-600°C

Adam WelchJonathan KintnerChristopher CadiganRyan O'HayreJoseph Beach

Traditional ammonia cracking is achieved at 850-950 °C in the presence of a nickel catalyst. The reaction is highly endothermic, and maintaining these high temperatures at high flow rates of ammonia gas can be difficult. Here, we present work using our advanced ammonia synthesis catalyst in an ammonia cracking setup. We use a metallic monolith catalyst support to minimize pressure drop at high flow rates. Full NH3 cracking occurs at 600 °C, with the onset of cracking at 400 °C. An output flame can be achieved with a fully tunable ratio of hydrogen to ammonia, depending on the temperature setpoint…

Material Discovery and Investigation of Novel Y Containing Ru Catalysts for Low Temperature Ammonia Decomposition
Presentation

Material Discovery and Investigation of Novel Y Containing Ru Catalysts for Low Temperature Ammonia Decomposition

Katie McCulloughTravis WilliamsJochen Lauterbach

Liquid ammonia can be used as an alternative hydrogen carrier and can be decomposed over catalysts to create a high purity hydrogen stream for fuel cell applications. Ammonia decomposition is typically catalyzed using supported ruthenium catalysts. Current ruthenium catalysts are expensive and often require reaction temperatures of 650 °C to attain complete conversion [1]. For the hydrogen produced from ammonia decomposition to be efficiently used in proton exchange membrane fuel cells, operating temperatures need to be considerably lowered and effluent concentrations of ammonia need to be minimized to avoid poisoning of the membrane [2]. Therefore, it is of interest to…

Carbon-Free H2 Production from NH3 Triggered at Ambient Temperature with Oxide Supported Ru Catalysts
Presentation

Carbon-Free H2 Production from NH3 Triggered at Ambient Temperature with Oxide Supported Ru Catalysts

Katsutoshi NagaokaKatsutoshi SatoYuta Ogura

Hydrogen produced from renewable energy has received a lot of attentions as a clean energy and development of a hydrogen storage and transportation system using hydrogen carrier has been greatly demanded. Among different kinds of hydrogen carrier, NH3 is regarded as one of the promising candidates, due to high energy density, high hydrogen capacity, and ease of liquification at room temperature. Furthermore, a carbon-free hydrogen storage and transportation system could be realized by using NH3 as hydrogen carrier. In this system, hydrogen produced from NH3 is used in engines, fuel cells, and turbines. However, use of NH3 as a hydrogen…

Engie, Siemens, STFC, and Ecuity awarded funding for green ammonia-to-hydrogen in UK
Article

Engie, Siemens, STFC, and Ecuity awarded funding for green ammonia-to-hydrogen in UK

Trevor Brown September 06, 2019

Last week, the UK Department for Business, Energy and Industrial Strategy (BEIS) announced a "£390 million government investment to reduce emissions from industry," with a focus on low-carbon hydrogen supply and clean steel production. As part of this investment, a consortium led by Ecuity Consulting that includes Siemens, Engie, and the Science & Technology Facilities Council (STFC), has been awarded £249,000 to perform "valuable research on the role of ammonia in the delivery of low cost bulk hydrogen for use in the UK energy system."

GenCell A5 update: hydrogen power from ammonia fuel cells (
Article

GenCell A5 update: hydrogen power from ammonia fuel cells ("The Next Big Thing in Energy Production")

Trevor Brown July 18, 2019

GenCell Energy, an Israeli technology company, recently announced a research collaboration with Fraunhofer UMSICHT, a German research institute, that will deliver a "scale-up of the catalyst synthesis process" for cracking ammonia. This will enable GenCell "to produce large quantities of a novel inexpensive catalyst for generation of hydrogen from ammonia."