Ammonia as hydrogen carrier for transportation; investigation of the ammonia exhaust gas fuel reforming

Wang, Wentao; Herreros, José Martín; Tsolakis, Athanasios; York, Andrew P. E.

doi:10.1016/j.ijhydene.2013.05.144

Cited by 149 publications

(68 citation statements)

References 39 publications

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“…[5] Ammonia is also combusted to generate hydrogen by ammonia cracking [7,8] and autothermal reforming. [3] However the challenges of homogeneous ammonia combustion are ah igh ignition temperature,l ow combustion rate,a nd N 2 Oa nd fuel NOx production. [9] Them ain body of research into ammonia oxidation is devoted to the ammonia slip reaction from diesel engines where the reaction is operated in an excess of oxygen.…”

mentioning

confidence: 99%

“…Ammonia can be considered as arenewable and carbon-free energy source [1][2][3][4] provided the ammonia is synthesized using sustainable resources such as wind or solar energy. [5] Aside from hydrogen, ammonia is the only carbon-free energy vector for transport applications.…”

mentioning

confidence: 99%

“…[10][11][12][13] Fewstudies have been devoted to stoichiometric mixtures. [3,14,15] Thus,there is aneed to develop new ammonia combustion systems.…”

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confidence: 99%

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Bottom‐Up Design of a Copper–Ruthenium Nanoparticulate Catalyst for Low‐Temperature Ammonia Oxidation

et al. 2017

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A novel nanoparticulate catalyst of copper (Cu) and ruthenium (Ru) was designed for low-temperature ammonia oxidation at near-stoichiometric mixtures using a bottom-up approach. A synergistic effect of the two metals was found. An optimum CuRu catalyst presents a reaction rate threefold higher than that for Ru and forty-fold higher than that for Cu. X-ray absorption spectroscopy suggests that in the most active catalyst Cu forms one or two monolayer thick patches on Ru and the catalysts are less active once 3D Cu islands form. The good performance of the tuned Cu/Ru catalyst is attributed to changes in the electronic structure, and thus the altered adsorption properties of the surface Cu sites.

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Bottom‐Up Design of a Copper–Ruthenium Nanoparticulate Catalyst for Low‐Temperature Ammonia Oxidation

et al. 2017

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“…H2 was injected before and after the DOC while NH3 was introduced only after the DOC (upstream the silver catalyst) for the purpose of NH3 -SCR. The hydrogen concentration in the exhaust was selected based on values that can be achieved using fuel reforming [22,23] and was measured using a Hewlett Packard 5890 II gas chromatograph (GC) with thermal conductivity detector (TCD) using argon as carrier gas. Whereas, NH3 and other exhaust species (e.g.…”

Section: Test Rig Configurationmentioning

confidence: 99%

Increased NO2 concentration in the diesel engine exhaust for improved Ag/Al2O3 catalyst NH3-SCR activity

Wang

Herreros

Tsolakis

et al. 2015

Chemical Engineering Journal

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Increasing the NO2 availability in some aftertreatment systems enhance their performance in reducing pollutants from internal combustion (IC) engines but result in significant fuel economy and CO2 emissions penalties. The presence of NO2 in the engine exhaust gas enhances the regeneration of the Diesel Particulate Filters (DPFs) and can improve the activity of the catalysts in reducing NOx emissions in the Selective Catalytic Reduction (SCRs) process. In this work the production and the role of the increased NO2 concentration in the Ag/Al2O3 catalyst for the SCR process of NOx removal at low exhaust gas temperatures under real engine operation has been investigated. We have increased the NO2 concentration available for the SCR process with i) the addition of different NH3 and H2 mixtures upstream the SCR catalyst and/or ii) by the use of a Pt based Diesel Oxidation Catalyst (DOC) in front of the Ag/Al2O3 -SCR catalyst. In the case of NH3 and H2 mixtures additions, H2 enhances the NO2 production on the Ag/Al2O3 catalyst, leading in promoting the "Fast -SCR" like reaction by utilising the available NH3 mainly at low reaction temperature. The incorporation of the DOC in front of the Ag/Al2O3 showed the same effect as it enhanced the NO2 availability for the SCR process.

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“…In addition, the energy efficiency (h) of the reformer was defined in Eq. (4) as the lower combustion enthalpy rate of the product stream divided by the sum of the lower combustion enthalpy rate of the feed stream and the electric energy provided by cartridge heaters [13]. The microchannel reactor was well-insulated and heat loss to the surroundings was considered negligible.…”

Section: Reformer Performance Parametersmentioning

confidence: 99%

Performance evaluation of a high-throughput microchannel reactor for ammonia decomposition over a commercial Ru-based catalyst

Chiuta

Everson

Neomagus

et al. 2015

International Journal of Hydrogen Energy

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Ammonia as hydrogen carrier for transportation; investigation of the ammonia exhaust gas fuel reforming

Cited by 149 publications

References 39 publications

Bottom‐Up Design of a Copper–Ruthenium Nanoparticulate Catalyst for Low‐Temperature Ammonia Oxidation

Bottom‐Up Design of a Copper–Ruthenium Nanoparticulate Catalyst for Low‐Temperature Ammonia Oxidation

Increased NO2 concentration in the diesel engine exhaust for improved Ag/Al2O3 catalyst NH3-SCR activity

Performance evaluation of a high-throughput microchannel reactor for ammonia decomposition over a commercial Ru-based catalyst

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