Non-Thermal Plasma and Catalyst System for Simultaneously Oxidizing SO₂ and NO_x

Abstract:

For the requirements of nitric oxide (NOx) and sulfur dioxide (SO2) removal process in coal-fired power plant, a new non-thermal plasma system combined with catalyst was developed to investigate the effect of parameters such as temperature, atmosphere, residence time, and additives (NH3 and methanol) on NOx and SO2 conversion rate. The results indicated that the new system could greatly promote the NOx conversion rate while it only had a slight influence on the SO2 oxidization rate. Meanwhile, high temperature suppressed the NO oxidization, and promoted the SO2 oxidation. The long residence time was beneficial to the NOx and SO2 oxidization. In the absence of water, the additive of NH3 can improve NO, NOx, and SO2 oxidization rate due to the reactions between NH3 and NOx, or SO2. Contrary to NH3, methonal had a negative effect on NOx and SO2 oxidization.

• Periodical: Advanced Materials Research (Volumes 634-638)
• Pages: 864-868
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.634-638.864
• Online since: January 2013
• Authors: Shi Zhong Han, Qiang Zhang, Zhi Qiong Chen
• Keywords: Catalyst, NO_x, Oxidization, Plasma, SO₂

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