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The deactivation behavior of SCR catalyst by alkali and alkali earth metal

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2016, 26(6), pp.238-242
  • DOI : 10.6111/JKCGCT.2016.26.6.238
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering
  • Received : September 22, 2016
  • Accepted : October 28, 2016
  • Published : December 31, 2016

Seungyun Han 1 Min-Chul Shin 2 Lee, Hee-Soo 1

1부산대학교
2한국산업기술시험원

Accredited

ABSTRACT

The effect of the alkali, alkali earth metal elements on selective catalytic reduction(SCR) catalyst deactivation behavior were investigated in terms of microstructure, surface area, pore volume and De-NOx test. Poisoned SCR catalyst were manufactured by injection of K2CO3, Na2CO3, Ca(CH3COO)2 · H2O, C4H6MgO4 · 4H2O, H3PO4 solutions in the new SCR catalyst at 350 o C for 6 hours. New and poisoned catalysts surface were similar. But specific surface area, pore volume decrease from Na, Mg, K, Ca, P compared to new SCR catalyst. Especially, Na poisoned catalyst surface area and pore size extremely decreased by 10.20 m 2 /g, 0.061 cm 2 /g. De-NOx test results of new and poisoned catalysts at 150~450 o C indicated that alkali metal (K, Na) poisoned SCR catalysts have the lowest De-NOx efficiency, alkali earth metal poisoned SCR catalysts (Ca, Mg) De-NOx efficiency are higher than alkali metal poisoned SCR catalysts. P poisoned SCR catalyst De-NOx efficiency is similar new SCR catalyst. It were considered that physical deactivation of SCR catalyst was affected by SCR catalyst surface area and pore volume change.

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