Blar i NTNU Open på forfatter "Kirste, Karsten Granlund"
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An In Situ XAS Study of the Cobalt Rhenium Catalyst for Ammonia Synthesis
Mathisen, Karina; Kirste, Karsten Granlund; Hargreaves, Justin S. J. (Journal article; Peer reviewed, 2018)A cobalt rhenium catalyst active for ammonia synthesis at 400 °C and ambient pressure was studied using in situ XAS to elucidate the reducibility and local environment of the two metals during reaction conditions. The ... -
COx-free hydrogen production from ammonia – mimicking the activity of Ru catalysts with unsupported Co-Re alloys
Kirste, Karsten Granlund; McAulay, Kate; E. Bell, Tamsin; Stoian, Dragos; Laassiri, Said; Hargreaves, Justin S. J.; Mathisen, Karina; Torrente-Murciano, Laura (Peer reviewed; Journal article, 2020)On-demand production of hydrogen from ammonia is a challenge limiting the implementation of ammonia as a long term hydrogen vector to overcome the difficulties associated with hydrogen storage. Herein, we present the ... -
In situ X-ray absorption spectroscopic studies of unsupported and supported CoRe during ammonia synthesis/ammonia decomposition
Kirste, Karsten Granlund (Doctoral theses at NTNU;2021:407, Doctoral thesis, 2021)In situ X-ray absorption spectroscopy (XAS) studies are crucial for studying the local environment, oxidation state and speciation of transition metals during thermal pre-treatments and during working conditions of catalysts. ... -
Introduction of rhenium to surface modified microporous and mesoporous materials.
Gaustad, Stian Kjønniksen (Master thesis, 2020)Et utvalg av ulike mikro- og mesopørse bærermaterialer var syntetisert og modifisert med en organosilan for å introdusere en aminopropylgruppe på innsiden av de porøse materialene. Den introduserte aminopropylgruppen var ... -
Method Development and Analysis of Sulfonated Fatty Acids Chain Distribution and Isomers
Belstad, Trym A. (Master thesis, 2023)Sulfonerte fettsyrer, SFA, er en type overflateaktive stoffer som ble undersøkt på 1950-, 60- og 70-tallet. Selv om forskningen lenge sto stille, har etterspørselen etter mer miljøvennlige produkter gjort SFA til en del ... -
Synthesis And Characterization Of Noble Metal Nanoparticle Impregnated Metal-Organic Frameworks
Kirste, Karsten Granlund (Master thesis, 2013)Metal-Organic frameworks (MOF) is a new class of materials that are porous and crystalline. The materials are made of inorganic coordination centers linked together by organic molecules. MOFs have the advantage of the ... -
Synthesis of Silica Aerogels with Single-Site Iron for Heterogeneous Catalysis
Aasland, Gaute Holst (Master thesis, 2019)Jern ble inkorporert i silika aerogeler laget med "waterglass" silika-forløper. Co-forløper (CP) syntesemetoden ble brukt i kombinasjon med en mer økonomisk tørking ved lavere temperatur og trykk (APD). En ny metode med ... -
XAS investigation of silica aerogel supported cobalt rhenium catalysts for ammonia decomposition
Kirste, Karsten Granlund; Laassiri, Said; Hu, Zhigang; Stoian, Dragos; Torrente-Murciano, Laura; Hargreaves, Justin S. J.; Mathisen, Karina (Peer reviewed; Journal article, 2020)The implementation of ammonia as a hydrogen vector relies on the development of active catalysts to release hydrogen on-demand at low temperatures. As an alternative to ruthenium-based catalysts, herein we report the ...