Sorvajarvi.pdf

Optical detection of KCl vapor

and atomic K releases from

biomass fuels combusted in

single particle reactor

Tapio Sorvajärvi and Juha Toivonen

Tampere University of Technology

Department of Physics, Optics Laboratory

Background

• KCl accelerates high temperature

corrosion and reduces the heat

transfer between flue gas and

superheated water vapor

• KCl reduction techniques require

real-time monitoring

• The study of KCl formation

kinetics needs sensitive

diagnostics

Finnish Swedish Flame Days 2013

11.4.2013

Optical Spectroscopy

• The study of the interaction between radiation

and matter as a function of wavelength.

• Benefits in metrology:

• Sensitivity

• Wide dynamic range

• Molecule specific

• Possibility of remote and in-situ sensing

Finnish Swedish Flame Days 2013

11.4.2013

Absorption of KCl and K

Potassium chloride (KCl)

Potassium (K)

Finnish Swedish Flame Days 2013

11.4.2013

CPFAAS technique

(Collinear Photofragmentation and Atomic Absorption Spectroscopy)

Two lasers

UV laser emitting 1 ns pulses

IR laser emitting cw-light

Potassium chloride (KCl)

Potassium (K)

Finnish Swedish Flame Days 2013

11.4.2013