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LUND UNIVERSITY LIBRARIES

Calibration of Quenching for laser-induced fluorescence of CO₂ at 2.7 μm

Stjärneblad, Philip LU (2019) FYSK02 20191
Department of Physics
Combustion Physics
Abstract
Knowledge about the gas-phase close to an active catalyst is essential in order to understand the properties of the catalytic reaction process. By the use of planar laser-induced fluorescence (PLIF), the gas-phase can be visualized with high spatial and temporal resolution without affecting the catalyst. In this work, catalytic CO oxidation over a Pd(100) catalyst is investigated using laser-induced fluorescence of CO₂. However, as the CO oxidation requires a gas mixture of CO, CO₂ and O₂, the problem of fluorescence quenching arises. This is caused by the CO₂ colliding with other molecules, where some energy transfers into kinetic energy. Therefore, a deeper study of the quenching factor is performed, it shows intensity drops of 50 % as a... (More)
Knowledge about the gas-phase close to an active catalyst is essential in order to understand the properties of the catalytic reaction process. By the use of planar laser-induced fluorescence (PLIF), the gas-phase can be visualized with high spatial and temporal resolution without affecting the catalyst. In this work, catalytic CO oxidation over a Pd(100) catalyst is investigated using laser-induced fluorescence of CO₂. However, as the CO oxidation requires a gas mixture of CO, CO₂ and O₂, the problem of fluorescence quenching arises. This is caused by the CO₂ colliding with other molecules, where some energy transfers into kinetic energy. Therefore, a deeper study of the quenching factor is performed, it shows intensity drops of 50 % as a result of quenching. Ultimately the quenching factors are applied to the Pd(100) measurement showing the gas-phase around the catalyst in greater detail. (Less)
Please use this url to cite or link to this publication:
author
Stjärneblad, Philip LU
supervisor
organization
course
FYSK02 20191
year
type
M2 - Bachelor Degree
subject
keywords
Laser-induced fluorescence, CO oxidation, Catalysis, Fluorescence quenching, Calibration
language
English
id
8986392
date added to LUP
2019-06-20 15:07:26
date last changed
2019-06-20 15:07:26
@misc{8986392,
  abstract     = {{Knowledge about the gas-phase close to an active catalyst is essential in order to understand the properties of the catalytic reaction process. By the use of planar laser-induced fluorescence (PLIF), the gas-phase can be visualized with high spatial and temporal resolution without affecting the catalyst. In this work, catalytic CO oxidation over a Pd(100) catalyst is investigated using laser-induced fluorescence of CO₂. However, as the CO oxidation requires a gas mixture of CO, CO₂ and O₂, the problem of fluorescence quenching arises. This is caused by the CO₂ colliding with other molecules, where some energy transfers into kinetic energy. Therefore, a deeper study of the quenching factor is performed, it shows intensity drops of 50 % as a result of quenching. Ultimately the quenching factors are applied to the Pd(100) measurement showing the gas-phase around the catalyst in greater detail.}},
  author       = {{Stjärneblad, Philip}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Calibration of Quenching for laser-induced fluorescence of CO₂ at 2.7 μm}},
  year         = {{2019}},
}