Simultaneous Removal of NO x and SO 2 through a Simple Process Using a Composite Absorbent

Ping Fang, Zijun Tang, Xiongbo Chen, Peiyi Zhong, Jianhang Huang, Zhixiong Tang and Chaoping Cen
Additional contact information
Ping Fang: South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
Zijun Tang: South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
Xiongbo Chen: South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
Peiyi Zhong: South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
Jianhang Huang: South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
Zhixiong Tang: South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China
Chaoping Cen: South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou 510655, China

Sustainability, 2018, vol. 10, issue 12, 1-18

Abstract: In this work, the feasibility of the simultaneous removal of NO x and SO 2 through a simple process using a composite absorbent (NaClO 2 /Na 2 S 2 O 8 ) was evaluated. Factors affecting the removal of NO x and SO 2 , such as NaClO 2 and Na 2 S 2 O 8 concentrations, solution temperature, the initial pH of solution, gas flow rate, and SO 2 , NO, and O 2 concentrations were studied, with a special attention to NO x removal. Results indicate that a synergistic effect on NO x removal has been obtained through combination of NaClO 2 and Na 2 S 2 O 8 . NaClO 2 in the solution played a more important role than did Na 2 S 2 O 8 for the removal of NO x . The above factors had an important impact on the removal of NO x , especially the solution temperature, the initial pH of the solution, and the oxidant concentrations. The optimum experimental conditions were established, and a highest efficiency of NO x removal of more than 80% was obtained. Meanwhile, tandem double column absorption experiments were conducted, and a NO x removal efficiency of more than 90% was reached, using NaOH solution as an absorbant in the second reactor. A preliminary reaction mechanism for NO x and SO 2 removal was deduced, based on experimental results. The composite absorbent has the potential to be used in the wet desulfurization and denitration process, to realize the synergistic removal of multi-pollutants.

Keywords: NO x; SO 2; NaClO 2; Na 2 S 2 O 8; wet scrubbing (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/2071-1050/10/12/4350/pdf (application/pdf)
https://www.mdpi.com/2071-1050/10/12/4350/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:10:y:2018:i:12:p:4350-:d:184772

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().