Zobrazeno 1 - 10 of 26 pro vyhledávání: '"Keld Johansen"'
1
Influence of the support on rhodium speciation and catalytic activity of rhodium-based catalysts for total oxidation of methane
Autor: Keld Johansen, Jakob Munkholt Christensen, Martin Andersson, Yu Zhang, Peter Glarborg, Thomas Klint Torp, Anker Degn Jensen
Publikováno v: Zhang, Y, Glarborg, P, Andersson, M P, Johansen, K, Torp, T K, Jensen, A D & Christensen, J M 2020, ' Influence of the support on rhodium speciation and catalytic activity of rhodium-based catalysts for total oxidation of methane ', Catalysis Science and Technology, vol. 10, no. 17, pp. 6035-6044 . https://doi.org/10.1039/d0cy00847h
The role of the support in Rh-based catalysts for total oxidation of CH4was investigated using both amorphous SiO2and γ-Al2O3as well as ZSM-5 and SSZ-13 zeolites with varying SiO2/Al2O3ratios. The methane oxidation activity was measured in both the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c2ef9a61a3d4c3a9701f1677809c72a1
https://doi.org/10.1039/d0cy00847h
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2
A Rhodium-Based Methane Oxidation Catalyst with HighTolerance to H2O and SO2
Autor: Martin Andersson, Jakob Munkholt Christensen, Keld Johansen, Yu Zhang, Peter Glarborg, Anker Degn Jensen, Thomas Klint Torp
Publikováno v: Zhang, Y, Glarborg, P, Johansen, K, Andersson, M P, Torp, T K, Jensen, A D & Christensen, J M 2020, ' A Rhodium-Based Methane Oxidation Catalyst with HighTolerance to H 2 O and SO 2 ', ACS Catalysis, vol. 10, pp. 1821-1827 . https://doi.org/10.1021/acscatal.9b04464
Increased use of natural gas as a fuel in efficient, lean-burning engines could offer environmental advantages, but this necessitates a catalytic oxidation of methane escaping from the engine. The challenge for the catalytic oxidation of CH4 is that
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e3034e7c9c5ff72a328da0740053122
https://orbit.dtu.dk/en/publications/60070588-b4d2-4c2e-9fa1-6e2b37afbc90
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3
SO2 Oxidation Across Marine V2O5-WO3-TiO2 SCR Catalysts: a Study at Elevated Pressure for Preturbine SCR Configuration
Autor: Joakim Reimer Thøgersen, Anker Degn Jensen, Keld Johansen, Brian Brun Hansen, Kim H. Pedersen, Steen Christensen
Publikováno v: Christensen, S R, Hansen, B B, Johansen, K, Pedersen, K H, Thøgersen, J R & Jensen, A D 2018, ' SO 2 Oxidation Across Marine V 2 O 5-WO 3-TiO 2 SCR Catalysts: a Study at Elevated Pressure for Preturbine SCR Configuration ', Emission Control Science and Technology, vol. 4, pp. 289–299 . https://doi.org/10.1007/s40825-018-0092-8
The undesired oxidation of SO2 was studied experimentally at elevated pressures of up to 4.5 bar across two commercial vanadium-based (1.2 and 3 wt% V2O5) selective catalytic reduction (SCR) catalysts. This pressure range is of interest for preturbin
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5b43159e76fb004c12076190e4a476d
https://doi.org/10.1007/s40825-018-0092-8
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4
Multi-catalytic soot filtration in automotive and marine applications
Autor: Keld Johansen
Publikováno v: Catalysis Today. 258:2-10
The emission of particulate matter (PM) and NO x from diesel engines has proven to have a negative influence on health, and future regulations will require more than 90% PM and NO x removal. For land-based trucks using low-sulfur fuels, a sequential
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6772538abc517903fa6a89fa9bd52dd0
https://doi.org/10.1016/j.cattod.2015.06.001
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5
Sulfur poisoning and regeneration of Rh-ZSM-5 catalysts for total oxidation of methane
Autor: Anker Degn Jensen, Jakob Munkholt Christensen, Yu Zhang, Martin Andersson, Keld Johansen, Thomas Klint Torp, Peter Glarborg
Publikováno v: Zhang, Y, Glarborg, P, Andersson, M P, Johansen, K, Torp, T K, Jensen, A D & Christensen, J M 2020, ' Sulfur poisoning and regeneration of Rh-ZSM-5 catalysts for total oxidation of methane ', Applied Catalysis B: Environmental, vol. 277, 119176 . https://doi.org/10.1016/j.apcatb.2020.119176
The activity of Rh/ZSM-5 catalysts for methane oxidation was investigated under conditions simulating the exhaust from lean burning, natural gas fueled engines to evaluate the influence of reaction atmosphere on catalytic activity. The Rh-catalysts y
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::29d263bd14fc83415c72a6d55562c8be
https://doi.org/10.1016/j.apcatb.2020.119176
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6
Pre-turbo SCR catalyst for NOx removal on Ships
Autor: Steen Riis Christensen, Brian Brun Hansen, Keld Johansen, Anker Degn Jensen
Publikováno v: Christensen, S M, Hansen, B B, Johansen, K & Jensen, A D 2017, ' Pre-turbo SCR catalyst for NOx removal on Ships ' 13th European Congress on Catalysis (EUROPACAT 2017), Florence, Italy, 27/08/2017-31/08/2017, .
Technical University of Denmark Orbit
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::1eff21427d677772d6c222e67ba726d1
http://orbit.dtu.dk/en/publications/preturbo-scr-catalyst-for-nox-removal-on-ships(a8aa5245-9edf-43f4-a5df-3a5333dd80d0).html
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10
An electrochemical impedance spectroscopy investigation of the overpotentials in Li-O2 batteries
Autor: Poul Norby, Tejs Vegge, Keld Johansen, Alan C. Luntz, Johan Hjelm, Bryan D. McCloskey, Jonathan Højberg
Publikováno v: ACS applied materialsinterfaces. 7(7)
Lithium-O2 (Li-O2) batteries are currently limited by a large charge overpotential at practically relevant current densities, and the origin of this overpotential has been heavily debated in the literature. This paper presents a series of electrochem
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b8b4b5c30b9ca404e591eeea7dace83a
https://pubmed.ncbi.nlm.nih.gov/25625507
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