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Biomass Suspension Combustion: Effect of Two-Stage Combustion on NOx Emissions in a Laboratory-Scale Swirl Burner

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A systematic study was performed in a suspension fired 20 kW laboratory-scale swirl burner test rig for
combustion of biomass and co-combustion of natural gas and biomass. The main focus is put on the effect of
two-stage combustion on the NO emission, as well as its effect on the incomplete combustion. When twostage
combustion was applied, the NO emission level can be significantly reduced. The experimental results
show that an optimal first-stage combustion stoichiometry (λ1) exists, at which a minimum NO emission can
be achieved. An optimal stoichiometry of around 0.8 in the fuel-rich zone exists with respect to minimizing
NO emissions. When using wood and straw as co-firing fuels, 15-25% of the fuel-N is converted to NO.
Straw appears to give the lowest conversion of fuel-N to NO. The results indicate that the optimal stoichiometry in the fuel-rich (λ1) zone for gaining the lowest NO may result from the homogeneous reaction, by comparing the NO emissions when firing natural gas with NH3 addition and co-firing natural gas and biomass. The experimental results also show no significant increase of incomplete combustion of gas and char by applying optimized two-stage combustion.

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Ketersediaan

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Informasi Detail

Judul Seri

Energy & Fuels

No. Panggil

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Penerbit

Washington, DC : American Chemical Society., 2009

Deskripsi Fisik

Energy & Fuels 2009, 23, 1398–1405

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

Versi lain/terkait

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