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Plasma Chemistry and Plasma Processing

, Volume 35, Issue 5, pp 831–844 | Cite as

Promotion of Nonthermal Plasma on the SO2 and H2O Tolerance of Co–In/Zeolites for the Catalytic Reduction of NO x by C3H8 at Low Temperature

  • Hua Pan
  • Qingfa Su
  • Jianwen Wei
  • Yanfei Jian
Original Paper

Abstract

Effects of nonthermal plasma (NTP) on the selective catalytic reduction of NO x by C3H8 (C3H8-SCR) over Co–In/zeolites were investigated in the presence of SO2 and H2O at low temperatures (<below 648 K). Co–In/H-(Beta/USY) displayed the highest low-temperature activity in the NTP-facilitated C3H8-SCR (PF-C3H8-SCR) hybrid system because of the enhancement of chemisorbed oxygen, acid sites, and weak adsorption species (NO2 and NO x ) on Co–In/H-(Beta/USY). The assistance of NTP significantly promoted the tolerance of SO2 and H2O on both Co–In/H-Beta and Co–In/H-(Beta/USY) in C3H8-SCR reaction. Co–In/H-(Beta/USY) even exhibited excellent SO2 tolerance in the PF-C3H8-SCR hybrid system when a relatively high concentration of SO2 (1000–2000 ppm) and 7 % H2O were introduced into the feed gas. Sulfate species formed on the active sites of Co–In/H-(Beta/USY) were unstable because of the relatively low-temperature (below 600 K) desorption of sulfate species. The unstable sulfate species contributed slight inhibition to C3H8 activation and nitrogen-containing formation on the active sites of Co–In/H-(Beta/USY) in the PF-C3H8-SCR hybrid system. The PF-C3H8-SCR hybrid system with Co–In/H-(Beta/USY) may be a potential candidate for DeNO x industrial applications.

Keywords

Nonthermal plasma Co–In/zeolites NO reduction Propane Low temperature 

Notes

Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No. 21006093) and Natural Science Basic Research Plan in Shaanxi Province of China (No. 2014JQ2-2009). This project was also supported by the Guangxi Education Department Project (2013YB111) and the Fundamental Research Funds for the Central Universities.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Department of Environmental Science and EngineeringXi’an Jiaotong UniversityXi’anPeople’s Republic of China
  2. 2.Longjing Environment Technology Co. LtdXiamenPeople’s Republic of China
  3. 3.College of Environmental Science and TechnologyGuilin University of TechnologyGuilinPeople’s Republic of China

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