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High catalytic activity of pitch-based activated carbon fibres of moderate surface area for oxidation of NO to NO2at room temperature

Authors
Journal
Fuel
0016-2361
Publisher
Elsevier
Publication Date
Volume
76
Issue
6
Identifiers
DOI: 10.1016/s0016-2361(96)00223-2
Keywords
  • Nitric Oxide Oxidation
  • Activated Carbon
  • Pitch-Based Fibres

Abstract

Abstract Catalytic oxidation of NO (380 ppmv) to NO 2 over activated carbon fibres of moderate surface area (∼800 m 2 g −1) at room temperature was carried out, to develop oxidative removal of NO from flue gas. The heat treatment of pitch-based activated carbon fibres of moderate surface area markedly increased the conversion of NO to 87% in dry air, 62% in air of 80% relative humidity and 24% in wet air (100% r.h.) at 25°C and a ratio of fibre mass to gas flow rate of 1.0 × 10 −2g min mL −1. The strong inhibiting effect of humidity on the activity of the as-received fibres was moderated by heat treatment of the fibres at 850°C. A lower concentration of 10 ppmv NO markedly reduced the oxidation, the conversions being 24 and 5% in dry and wet (100% r.h.) air respectively. The catalytic activities of other pitch-based fibres of different surface area were also much inferior in moist air above 60% r.h.

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