Catalytic combustion of CH4-H2-CO mixtures at pressure up to 10 bar
Catalytic combustion has attracted a renewed interest as an alternative route to homogeneous combustion of low BTU mixtures (H2, CO). As a matter of fact, the partial or total replacement of natural gas (i.e. CH4) with low BTU fuels is usually accompanied by a reduction of fuel dilution and an incre...
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Veröffentlicht in: | Fuel processing technology 2013-03, Vol.107, p.147-154 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Catalytic combustion has attracted a renewed interest as an alternative route to homogeneous combustion of low BTU mixtures (H2, CO). As a matter of fact, the partial or total replacement of natural gas (i.e. CH4) with low BTU fuels is usually accompanied by a reduction of fuel dilution and an increase of NOx emissions. In this work we experimentally investigate the effect of the partial substitution of CH4 with H2/CO mixtures (representatives of syngas) over a 20wt%LaMnO3/La- gamma Al2O3 based monolith. The tests were carried out under self-sustained and high pressure conditions (up to 10 bar). The mixtures studied are characterized by the same overall heating value. Three H2/CO ratios were investigated. Results showed that methane substitution with syngas is useful to obtain full fuel ignition under less severe conditions (i.e. at lower pressure keeping constant the pre-heating temperature) and that ignition is mainly driven by CO combustion, which is the most reactive fuel among CH4, H2 and CO itself on LaMnO3 catalyst. |
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ISSN: | 0378-3820 1873-7188 |
DOI: | 10.1016/j.fuproc.2012.08.024 |