| 1. |
- Ekvall, Thomas, 1986, et al.
(author)
-
CO-KCl-SO2 interactions in an 80 kW propane-fired flame
- 2014
-
In: the proceedings of the Impacts of Fuel Quality on Power production conference, 2014. ; , s. 13-
-
Conference paper (other academic/artistic)abstract
- It is well known that combustion of biomass derived fuels may lead to problems with high-temperature corrosion (HTC). The HTC process is largely based on the release and transformation of chlorine, sulphur and alkali components during the combustion process. However, these components may also interact with other critical parts of the combustion chemistry and the present work focuses on how potassium chloride and sulphur dioxide influence the oxidation of carbon monoxide. This is investigated during combustion of propane (80 kW) applying both air and oxy-fuel combustion conditions. The experiments were carried out in Chalmers 100 kW oxy-fuel test facility in which sulphur dioxide and potassium chloride was added to the flame. The experimental results are also supported by modelling work including a detailed reaction mechanism of the related alkali-S-Cl chemistry. The results show that KCl promotes CO-oxidation in oxy-fuel combustion. However, for the experimental conditions tested in the present work, no significant effect was detected in air combustion. In addition, when adding water as well as SO2 to the flames, there were no significant effects on the measured CO concentrations in the respective flames.
|
|
| 2. |
- Nizzola, Giovanni, et al.
(author)
-
In-flame reduction of NOx in oxy-propane combustion at high inlet oxygen concentrations: the importance of soot-NOx interactions
- 2014
-
In: Proceedings of the 38th International Technical Conference on Clean Coal & Fuel Systems, June 1-5 2014, Clearwater, Florida, USA..
-
Conference paper (other academic/artistic)abstract
- Previous oxy-fuel combustion of propane performed at Chalmers University of Technology has shown possi-bilities for high NOx reduction during inlet oxygen concentrations above 35%. Such enhanced reduction has not been possible to acknowledge to only homogenous reburning effects. In this work it is investigated to what ex-tent this can be an effect of soot-NOx interactions. Soot formation has been studied by using an existing soot model. By comparing modeling results with recently published experimental data it is shown that the model is capable to predict soot formation during relevant conditions. In addition, a model for homogenous nitrogen chemistry has been used in the evaluation and sensitivity to key combustion parameters. The increased amount of soot found at high oxygen concentrations, together with higher reaction activity for gas phase species, known to be of importance for both NOx formation and soot production, support the theory that the high NOx reduction found at high oxygen concentration is a result of soot-NOx interactions.
|
|
