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Removal of hazardous gaseous pollutants from industrial flue gases by a novel multi-stage fluidized bed desulfurizer

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Abstract.
Sulfur dioxide and other sulfur compounds are generated as primary pollutants from the major industries
such as sulfuric acid plants, cupper smelters, catalytic cracking units, etc. and cause acid rain. To remove the SO2 from waste flue gas a three-stage counter-current multi-stage fluidized bed adsorber was developed
as desulfurization equipment and operated in continuous bubbling fluidization regime for the two-phase
system. This paper represents the desulfurization of gas mixtures by chemical sorption of sulfur dioxide
on porous granular calcium oxide particles in the reactor at ambient temperature. The advantages of the
multi-stage fluidized bed reactor are of high mass transfer and high gas–solid residence time that can
enhance the removal of acid gas at low temperature by dry method. Experiments were carried out in the
bubbling fluidization regime supported by visual observation. The effects of the operating parameters
such as sorbent (lime) flow rate, superficial gas velocity, and the weir height on SO2 removal efficiency
in the multistage fluidized bed are reported. The results have indicated that the removal efficiency of the
sulfur dioxide was found to be 65% at high solid flow rate (2.0 kg/h) corresponding to lower gas velocity
(0.265 m/s), wier height of 70 mm and SO2 concentration of 500ppm at room temperature.

Keywords:
Multi-stage fluidized bed desulfurizer
SO2 removal efficiency
Lime
Pollution control
Hazardous pollutants

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Informasi Detail

Judul Seri

Journal of Hazardous Materials

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Journal of Hazardous Materials 165 (2009) 427–434

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

LINGKUNGAN HIDUP

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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