24 褐鉄鉱を用いる燃料ガス中のアンモニアの分解除去に対するマグネシウムの添加効果(資源利用,クリーン化)

抄録

Effect of alkaline earth metals on the decomposition of 2000 ppm NH_3 in a syngas-rich fiiel gas (50 % CO/25 % H_2/5 % CO_2/3 % H_2O) with an Australian a-FeOOH-rich limonite has been studied with a vertical, cylindrical flow-type quartz reactor under the conditions of 0.1 MPa, 750℃ and 45000 h^<-1>. Mg cations added to the limonite, at a low loading of 3 mass% Mg, suppress the deposition of carbon by the disproportionation of CO in the syngas apparently, and the Mg-added limonite catalyst achieves the almost complete decomposition of NH_3 in this atmosphere to N_2 and maintains the high performance for about 15 h. These observations suggest that the Mg-added limonite is a promising catalyst material for NH_3 decomposition.