Microwave induced reactions of SO2 and NOx decomposition in the char-bed

1 January 1994

journal article
Published by Springer Nature in Research on Chemical Intermediates

Vol. 20 (1) , 13-28
https://doi.org/10.1163/156856794x00036

Abstract

Microwaves applied to a pyrolytic carbon matrix enhance the chemical reactions of SO₂ and NO_x decomposition. The SO₂ and NO_x in a coal combustor product gas are adsorbed in a char bed and decomposed by the microwave to elemental sulfur and nitrogen, respectively. High removal rates of SO₂ and NO_x -- near 98% -- were observed in the laboratory tests. The activated carbon used as an adsorbent is also produced inexpensively in the electromagnetic field from coal pyrolysis. During the 21-cycle adsorption and decomposition experiments, the surface area of the bed carbon was increased from 7 m²/g to 700 m²/g. Process concept testing and economic evaluation will be completed in the U.S. Department of Energy, SBIR Phase II Program under Contract Number DE-FG03-90ER80898. This program is also supported in part by the National Science Foundation under Grant Number EHR-910-8774. The paper presents the laboratory test results obtained to date.

Keywords

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