Development of high-temperature desulfurizing absorbent-type denitrification catalyst for simultaneous removal of H2S and NH3.

Kasaoka, Shigeaki; Sasaoka, Eiji; Inari, Masato; Sada, Norimasa

doi:10.3775/jie.66.210

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1996

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“…The rate of NH, decomposition was independent of steam concentration in the reaction gas. Kasaoka et al (1987) developed materials for simultaneous removal of H,S and NH,. The H,S absorbents BaO or CaO were combined with Fe as an NH, decomposition catalyst and supported on either Al,O,, TiO,, SiO, or MgO.…”

Section: Literature Reviewmentioning

confidence: 99%

Ammonia decomposition in coal gasification atmospheres

et al. 1996

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Ammonia present in the product gas from coal gasification may increase NOx emissions from IGCC systems. A fixed bed reactor was used to study the effect of calcined limestone (CaO) on NH3 decomposition and reaction of NH3 and NO. Reactions at temperatures to 900°C in helium and in gas compositions typical of air‐blown gasifiers were studied. Although CaO enhanced ammonia decomposition in helium, reaction in the gasification atmosphere resulted in the loss of this catalytic activity. Increasing the total pressure further reduced the rate of NH3 decomposition. CaO enhanced conversion of NO to NH3 in gasification atmospheres.

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Section: Literature Reviewmentioning

confidence: 99%