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Catalytic performance of limonite in the decomposition of 2000 ppm NH 3 in the presence of a small concentration of H 2 S has been studied with a cylindrical quartz reactor at a high space velocity of 45000 h −1 to examine the sulfur tolerance of the limonite catalyst. It is not poisoned apparently by 50–500 ppm H 2 S at 750 °C, but the remarkable sulfur poisoning is...
A novel hot gas cleanup method to decompose a low concentration of NH 3 to N 2 with metal cations present inherently in low rank coals has been studied with a quartz reactor under the conditions of 750–850°C, 0.1MPa and high space velocity of 45,000h −1 . Each coal is pyrolyzed at 900°C to prepare the char, which is subjected to the decomposition of 2000ppm NH 3 after...
Catalytic NH3 decomposition with limonite rich in α-FeOOH has been studied as a hot gas cleanup method to remove a low concentration of NH3 from fuel gas produced in coal gasification. Fine particles of metallic Fe formed from α-FeOOH achieve the almost complete decomposition of 2000 ppm NH3 to N2 at 500°C under a high space velocity of 45,000 h−1 and show the stable catalytic performance for 50 h...
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