Investigating the effect of oxy-fuel combustion and light coal volatiles interaction: A mass spectrometric study

Axisymmetric Linear Hyperspectral Absorption Spectroscopy and Residuum-Based Parameter Selection on a Counter Flow Burner

“…The experimental setup consists of the counterflow burner and the TDLAS measurement setup. The counterflow burner has already been studied in [1].…”

“…The round nozzles have diameters of 20 mm and a distance of 10 mm (see Figure 1). A detailed description of the burner design is given in [1]. A stable, axissymmetric, flat flame forms approximately mid-way between both nozzles.…”

“…Species mole fractions and flow rates for all operating points. The global strain rate (see [15]) for all operating points is 70 1 s and the oxidizer and fuel stream are momentum balanced. Operating points marked with * have not been presented in [1].…”

“…This change in chemical environment and the complex mix of volatile species emitted by the coal particles challenge state-of-the-art reaction mechanisms and necessitate their validation. To assess the effect of Oxyfuel atmosphere on light coal volatile combustion, speciation studies have been conducted on an axisymmetric counterflow burner [1]. While the full speciation studies are performed using probe-taking time-of-flight mass spectrometry, capturing temperature profiles for the full characterization of the operating points can still be a challenging problem.…”

“…The availability of full local spectra also allows for giving local signal-to-noise ratios (SNR) for measuring the trustworthiness of the results. Hence, we employ LHAT in conjunction with an onion peeling grid and second order Tikhonov regularization for the reconstruction of temperature and water mole fraction profiles in the counterflow flames investigated in the speciation studies [1].…”