Operational issues in premixed combustion of hydrogen-enriched and syngas fuels

摘要: Abstract The growing interest in the use of syngas, as a means to reduce fossil fuel consumption and CO 2 emissions, has promoted many works focused on evaluating their combustion characteristics before existing combustors, generally optimized for conventional fuels. Although effect composition stability range (flashback blowout) been analyzed wide number previous studies, much less attention devoted other issues, such relation between flashback instabilities. present work is, therefore, analyzing main concerns syngas combustion: range, instabilities pollutant also specifically addressing pressure fluctuations appearance. results obtained revealed that an important especially However, different trends were observed not only function but burner configuration. As consequence, although some approximations, definition critical Damkohler number, seemed give quite accurate predictions certain fuels or configurations, thorough analysis should be made each using it given In addition, with high hydrogen content, under circumstances, evidence existence triggering mechanism pulsating episodes thermo-acoustic was found. This result practical importance since, had methane flames throughout works, appearance flames, where they can triggered by events, clearly tested. Finally, emissions analyzed.