The low-temperature SCR of NO over rice straw and sewage sludge derived char

Jin Sun Cha, Jong Cheol Choi, Jeong Huy Ko, Young Kwon Park, Sung Hoon Park, Kwang Eun Jeong, Seung Soo Kim, Jong Ki Jeon

Research output: Contribution to journalArticlepeer-review

118 Scopus citations

Abstract

Rice straw char and sewage sludge char were applied as catalysts for selective catalytic reduction between 50 and 250 °C using ammonia as the reducing agent. Each char was activated physically, using water vapor, or chemically, using KOH. The characteristics of the prepared catalysts were analyzed through elemental analysis, N2 adsorption-desorption, FT-IR, NO-TPD, NH3-TPD, and NOx removal efficiency. The physically activated chars showed characteristics similar to those of the non-activated chars, whereas the chemically activated chars exhibited increased specific surface areas, pore volumes, NO adsorption capacities, NH3 adsorption capacities, and oxygen functional group amounts, leading to higher NOx removal efficiency. When the catalysts were impregnated with 3 wt% manganese, NOx removal efficiency significantly increased. In particular, the NOx removal efficiency was highest when the chemically activated chars were impregnated with manganese.

Original languageEnglish
Pages (from-to)321-327
Number of pages7
JournalChemical Engineering Journal
Volume156
Issue number2
DOIs
StatePublished - 15 Jan 2010

Keywords

  • Chemical activation
  • Manganese
  • Rice straw char
  • Selective catalytic reduction (SCR)
  • Sewage sludge char

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