Low Temperature Performance of Selective Catalytic Reduction of NO with NH 3 under a Concentrated CO 2 Atmosphere

Xiang Gou, Chunfei Wu, Kai Zhang, Guoyou Xu, Meng Si, Yating Wang, Enyu Wang, Liansheng Liu and Jinxiang Wu
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Xiang Gou: School of Energy and Environmental Engineering, Hebei University of Technology, 5340# Xiping Road, Shuangkou Town, Beichen District, Tianjin 300401, China
Chunfei Wu: School of Engineering, University of Hull, Hull, HU6 7RX, UK
Kai Zhang: School of Energy and Environmental Engineering, Hebei University of Technology, 5340# Xiping Road, Shuangkou Town, Beichen District, Tianjin 300401, China
Guoyou Xu: School of Energy and Environmental Engineering, Hebei University of Technology, 5340# Xiping Road, Shuangkou Town, Beichen District, Tianjin 300401, China
Meng Si: School of Energy and Environmental Engineering, Hebei University of Technology, 5340# Xiping Road, Shuangkou Town, Beichen District, Tianjin 300401, China
Yating Wang: School of Energy and Environmental Engineering, Hebei University of Technology, 5340# Xiping Road, Shuangkou Town, Beichen District, Tianjin 300401, China
Enyu Wang: School of Energy and Environmental Engineering, Hebei University of Technology, 5340# Xiping Road, Shuangkou Town, Beichen District, Tianjin 300401, China
Liansheng Liu: School of Energy and Environmental Engineering, Hebei University of Technology, 5340# Xiping Road, Shuangkou Town, Beichen District, Tianjin 300401, China
Jinxiang Wu: School of Energy and Environmental Engineering, Hebei University of Technology, 5340# Xiping Road, Shuangkou Town, Beichen District, Tianjin 300401, China

Energies, 2015, vol. 8, issue 11, 1-11

Abstract: Selective catalytic reduction of NO x with NH 3 (NH 3 -SCR) has been widely investigated to reduce NO x emissions from combustion processes, which cause environmental challenges. However, most of the current work on NO x reduction has focused on using feed gas without CO 2 or containing small amounts of CO 2 . In the future, oxy-fuel combustion will play an important role for power generation, and this process generates high concentrations of CO 2 in flue gas. Therefore, studies on the SCR process under concentrated CO 2 atmosphere conditions are important for future SCR deployment in oxy-fuel combustion processes. In this work, Mn- and Ce-based catalysts using activated carbon as support were used to investigate the effect of CO 2 on NO conversion. A N 2 atmosphere was used for comparison. Different process conditions such as temperature, SO 2 concentration, H 2 O content in the feed gas and space velocity were studied. Under Mn-Ce/AC conditions, the results suggested that Mn metal could reduce the inhibition effect of CO 2 on the NO conversion, while Ce metal increased the inhibition effect of CO 2 . High space velocity also resulted in a reduction of CO 2 inhibition on the NO conversion, although the overall performance of SCR was greatly reduced at high space velocity. Future investigations to design novel Mn-based catalysts are suggested to enhance the SCR performance under concentrated CO 2 atmosphere conditions.

Keywords: selective catalytic reduction (SCR); oxy-fuel combustion; low-temperature; Mn; Ce; CO 2 (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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