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dc.contributor.authorSayas, Salvador
dc.contributor.authorMorlanes, Natalia Sanchez
dc.contributor.authorKatikaneni, Sai P.
dc.contributor.authorHarale, Aadesh
dc.contributor.authorSolami, Bandar
dc.contributor.authorGascon, Jorge
dc.date.accessioned2020-09-07T08:41:06Z
dc.date.available2020-09-07T08:41:06Z
dc.date.issued2020
dc.date.submitted2020-04-05
dc.identifier.citationSayas, S., Morlanés, N., Katikaneni, S. P., Harale, A., Solami, B., & Gascon, J. (2020). High pressure ammonia decomposition on Ru–K/CaO catalysts. Catalysis Science & Technology, 10(15), 5027–5035. doi:10.1039/d0cy00686f
dc.identifier.issn2044-4761
dc.identifier.issn2044-4753
dc.identifier.doi10.1039/d0cy00686f
dc.identifier.urihttp://hdl.handle.net/10754/664971
dc.description.abstractPotassium-promoted ruthenium supported on CaO is a very efficient catalyst for ammonia decomposition, surpassing the performance of other Ru-supported solids. At an optimum Ru loading of 3% wt, catalysts with a K/Ru atomic ratio of 0.9 showed the best catalytic performance under a wide range of operating conditions, P = 1-40 bar, T = 250-550 °C and WHSV = 9000-30 000 mL g-1 h-1. Although NH3 conversion levels decrease considerably upon increasing the reaction pressure (X550 °C, 40 bar = 0.8), high pressure ammonia decomposition offers the possibility of COx-free compressed hydrogen and hydrogen productivities and TOFs 40 times bigger than when applying atmospheric pressure. Extensive characterization by CO chemisorption and HR-TEM demonstrates that potassium promotion increases metal dispersion by decreasing the Ru particle size. Electronic effects derived from the close proximity between K and Ru result in a decrease in the reaction apparent activation energy, as shown by a detailed kinetic analysis.
dc.description.sponsorshipSaudi Aramco is gratefully acknowledged for financial support.
dc.publisherRoyal Society of Chemistry (RSC)
dc.relation.urlhttp://xlink.rsc.org/?DOI=D0CY00686F
dc.rightsOpen Access Article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/
dc.titleHigh pressure ammonia decomposition on Ru-K/CaO catalysts
dc.typeArticle
dc.contributor.departmentChemical Engineering Program
dc.contributor.departmentKAUST Catalysis Center (KCC)
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalCatalysis Science and Technology
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionCarbon Management R&D Division, Research and Development Center, Saudi Aramco Dhahran 31311 Saudi Arabia
dc.identifier.volume10
dc.identifier.issue15
dc.identifier.pages5027-5035
kaust.personSayas, Salvador
kaust.personMorlanes, Natalia Sanchez
kaust.personGascon, Jorge
dc.date.accepted2020-06-26
dc.identifier.eid2-s2.0-85089704806
refterms.dateFOA2020-09-07T08:42:27Z


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