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Papers by Johannes Skotte
... Page 3. Acknowledgements First of all, I would like to thank my advisors: Professor Rasmus Fe... more ... Page 3. Acknowledgements First of all, I would like to thank my advisors: Professor Rasmus Fehrmann and Professor Claus Hviid Christensen for their support, guidance, and encouragement over the past year. ... Doc. Søren Birk Rasmussen for ideas and discussions. iii Page 4. ...
Physical Chemistry Chemical Physics, 2012
A monolithic vanadia-titania based catalyst has been subjected to studies with in situ FTIR spect... more A monolithic vanadia-titania based catalyst has been subjected to studies with in situ FTIR spectroscopy coupled with mass spectrometry, during the SCR (Selective Catalytic Reduction) reaction. A device based on a transmission reactor cell for monolithic samples was constructed, dedicated to the study of surface species during reaction. After analysing the steady state SCR activity under industrially relevant conditions, NH(3) chemisorption phenomena as a function of temperature and the subsequent SCR reaction of NO + O(2) with chemisorbed ammonia and ammonium ion species were also investigated. The observations reported here serve as a demonstration of the great potential for the application of operando spectroscopy on monolithic systems. This cross disciplinary approach aims to identify reaction pathways, active sites, intermediate- and spectator-species for catalytic reactions under truly industrial conditions in a shaped monolithic catalyst based on monitoring chemical profiles along its channels. In particular, by demonstrating the feasibility of the approach using the technically challenging operando transmission FTIR spectroscopy methodology, we foresee easy future adaption of this approach with other surface or bulk sensitive techniques, e.g. Raman and UV-vis spectroscopy.
Journal of Catalysis, 2007
Catalysis Communications, 2009
orbit.dtu.dk
A series of V2O5-ZrO2-SO4 2--sepiolite mixtures were extruded, calcined and characterized. NH3-SC... more A series of V2O5-ZrO2-SO4 2--sepiolite mixtures were extruded, calcined and characterized. NH3-SCR activity was related to the phase distribution of the agglomerant and active VOX-ZrO2-SO4 ... 2-phase, as well as the acidity of the ... In recent years [1], the use of ...
Applied Catalysis B: Environmental, 2006
Use of biomass as an alternative to fossil fuels has achieved increasing interest since it is con... more Use of biomass as an alternative to fossil fuels has achieved increasing interest since it is considered neutral regarding CO 2 accumulation in the atmosphere. The by far most energy-efficient use of solid bio-resources in energy production is combustion in combined biomass and coal ...
orbit.dtu.dk
Introduction Burning municipal waste or sludges instead of landfill depositing is an important is... more Introduction Burning municipal waste or sludges instead of landfill depositing is an important issue from an environmental point of view, since this waste to energy conversion also implies several benefits such as control of toxic emissions and heavy metal waste, etc. In this ...
Applied Catalysis B: Environmental, 2011
Studies in Surface …, 2010
The use of biomass in fossil fuel based power plants is of increasing interest, since it is consi... more The use of biomass in fossil fuel based power plants is of increasing interest, since it is considered as a CO 2 neutral fuel, having zero human impact on the carbon release to the atmosphere. Simultaneously, continuous efficient selective catalytic reduction of NO with ammonia (NH ...
... Page 3. Acknowledgements First of all, I would like to thank my advisors: Professor Rasmus Fe... more ... Page 3. Acknowledgements First of all, I would like to thank my advisors: Professor Rasmus Fehrmann and Professor Claus Hviid Christensen for their support, guidance, and encouragement over the past year. ... Doc. Søren Birk Rasmussen for ideas and discussions. iii Page 4. ...
Physical Chemistry Chemical Physics, 2012
A monolithic vanadia-titania based catalyst has been subjected to studies with in situ FTIR spect... more A monolithic vanadia-titania based catalyst has been subjected to studies with in situ FTIR spectroscopy coupled with mass spectrometry, during the SCR (Selective Catalytic Reduction) reaction. A device based on a transmission reactor cell for monolithic samples was constructed, dedicated to the study of surface species during reaction. After analysing the steady state SCR activity under industrially relevant conditions, NH(3) chemisorption phenomena as a function of temperature and the subsequent SCR reaction of NO + O(2) with chemisorbed ammonia and ammonium ion species were also investigated. The observations reported here serve as a demonstration of the great potential for the application of operando spectroscopy on monolithic systems. This cross disciplinary approach aims to identify reaction pathways, active sites, intermediate- and spectator-species for catalytic reactions under truly industrial conditions in a shaped monolithic catalyst based on monitoring chemical profiles along its channels. In particular, by demonstrating the feasibility of the approach using the technically challenging operando transmission FTIR spectroscopy methodology, we foresee easy future adaption of this approach with other surface or bulk sensitive techniques, e.g. Raman and UV-vis spectroscopy.
Journal of Catalysis, 2007
Catalysis Communications, 2009
orbit.dtu.dk
A series of V2O5-ZrO2-SO4 2--sepiolite mixtures were extruded, calcined and characterized. NH3-SC... more A series of V2O5-ZrO2-SO4 2--sepiolite mixtures were extruded, calcined and characterized. NH3-SCR activity was related to the phase distribution of the agglomerant and active VOX-ZrO2-SO4 ... 2-phase, as well as the acidity of the ... In recent years [1], the use of ...
Applied Catalysis B: Environmental, 2006
Use of biomass as an alternative to fossil fuels has achieved increasing interest since it is con... more Use of biomass as an alternative to fossil fuels has achieved increasing interest since it is considered neutral regarding CO 2 accumulation in the atmosphere. The by far most energy-efficient use of solid bio-resources in energy production is combustion in combined biomass and coal ...
orbit.dtu.dk
Introduction Burning municipal waste or sludges instead of landfill depositing is an important is... more Introduction Burning municipal waste or sludges instead of landfill depositing is an important issue from an environmental point of view, since this waste to energy conversion also implies several benefits such as control of toxic emissions and heavy metal waste, etc. In this ...
Applied Catalysis B: Environmental, 2011
Studies in Surface …, 2010
The use of biomass in fossil fuel based power plants is of increasing interest, since it is consi... more The use of biomass in fossil fuel based power plants is of increasing interest, since it is considered as a CO 2 neutral fuel, having zero human impact on the carbon release to the atmosphere. Simultaneously, continuous efficient selective catalytic reduction of NO with ammonia (NH ...