Author
Sivaji Seepana
Bio: Sivaji Seepana is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Combustion & Adiabatic flame temperature. The author has an hindex of 5, co-authored 6 publications receiving 213 citations.
Papers
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TL;DR: In this article, a new variant of the oxy-fuel combustion for carbondioxide (CO2) sequestration in which steam is used to moderate the flame temperature was proposed, and flame structure analysis was carried out using a 325-step reaction mechanism of methane-oxidant combustion to determine the concentration of oxygen required to ensure a stable flame.
121 citations
38 citations
TL;DR: In this article, a new variant to the oxy-coal combustion in a pulverized coal burner is proposed in which CO 2 -enriched flue gas is used to moderate the flame temperature in conventional oxy-fuel combustion.
35 citations
TL;DR: In this paper, the role of CO2 addition through exhaust gas recirculation on the combustion chemistry of an oxy-methane flame has been investigated and a flame structure analysis of various combinations of methane-oxidant flames has been carried out using the GRI 30 325-step mechanism.
30 citations
TL;DR: In this article, an experimental investigation of oxy-fuel combustion carried out in a co-axial, horizontally-fired swirl-stabilized burner was carried out, and the results of extinction studies with CO2 or nitrogen dilution indicate that CO2-diluted flames are more prone to extinction by dilution than N2 diluted flames, whereas the latter can be sustained at oxygen concentrations down to 15% by volume.
10 citations
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TL;DR: Oxy-coal combustion has generated significant interest since it was proposed as a carbon capture technology for newly built and retrofitted coal-fired power plants, and numerical models for sub-processes are also used to examine the differences between combustion in an oxidizing stream diluted by nitrogen and carbon dioxide as mentioned in this paper.
866 citations
TL;DR: In this paper, the characteristics of biogas are investigated under various combustion regimes such as Biogas conventional combustion, hydrogen-enriched BiogAS traditional combustion, biogAS flameless mode and hydrogen-enhanced BiogAs flameless combustion.
Abstract: Based on the biogas feedstock and its generation cycle, a considerable part of biogas ingradients are noncombustible gases. Low calorific value (LCV) of biogas is one of the most important barriers of biogas development in the combined heat and power (CHP) generation. Biogas purification is usually performed in sensitive utilizations, however modification methods such as cryogenic and membrain are not economic. Therefore, new methods of biogas utilization should be experimented. In this study, characteristics of biogas are investigated under various combustion regimes such as biogas conventional combustion, hydrogen-enriched biogas traditional combustion, biogas flameless mode and hydrogen-enriched biogas flameless combustion. Since biogas conventional combustion is not well-sustained due to LCV of biogas, hydrogen addition to the biogas components could improve combustion stability however NOx formation increases. Although flameless combustion of fosil fuel have been developed, few documents could be found about biogas flameless mode. Flameless combustion of biogas could be one of the best methods of pure biogas utilization in CHP generation. Combustion stability and low pollutant formation are the main advantages of biogas flameless combustion. The initial cost of flameless combustion instalation is high due to the cost of instrumentation and special equipments. In order to maintain the temperature inside the flameless chamber, some especial materials such as ceramic should be utilized. Biogas flameless combustion could be modified by hydrogen-enrichment strategy. The temperature distribution inside the flameless chamber is more uniform when small amounts of hydrogen added to the biogas components and the flameless regime is more sustained. In this circumstance the rate of pollutant formation is a little higher than pure biogas flameless combustion.
162 citations
TL;DR: In this paper, a novel CaO/Ca12Al14O33 sorbent with a microtube-like structure was prepared from carbide slag and Al(NO3)3·9H2O using paper fibre as a biotemplate.
122 citations
TL;DR: In this article, a new variant of the oxy-fuel combustion for carbondioxide (CO2) sequestration in which steam is used to moderate the flame temperature was proposed, and flame structure analysis was carried out using a 325-step reaction mechanism of methane-oxidant combustion to determine the concentration of oxygen required to ensure a stable flame.
121 citations
TL;DR: In this article, the performance of a flameless combustion chamber fueled by biogas has been evaluated in a lab-scale flamed combustion furnace and it has been demonstrated that flameless burning is one of the best feasible strategies for the efficient utilization of biogenic gases.
97 citations