煤气高温脱硫的实验研究

中高温煤气脱硫是提高煤清洁转化利用效率的关键技术.该研究开发了锰基的中高温脱硫剂，并在固定床反应器中考察了烧结温度、硫化温度、硫化气氛以及进口硫化氢浓度对脱硫剂脱硫性能的影响.实验结果表明，在1100 ℃下烧结后的脱硫剂有较好的机械强度和脱硫性能，脱硫精度最高可达2×10^-6.脱硫剂在硫化温度为700 ℃时的脱硫性能最佳，硫容量可达31.8%.随着硫化气体中CO²含量的增加，导致气氛中氧势增高，从而使脱硫精度下降.当CO²含量从0%增加到4.53%时，出口硫化氢浓度从2×10^-6上升到20×10^-6.进口H₂S气体含量的增加，对脱硫精度的影响并不是特别明显，但缩短了脱硫穿透时间

Experimental Study on Desulfurization Performance of Hot Gas at Medium and High Temperature

Desulfurization at medium and high temperature is a key technique for improving utilization factor of cleaning coal. Mn based sorbent used for hot gas was investigated in this experimental study. The performance of Mn-based sorbent was studied from sintering temperature, sulfidation temperature, sulfidation gas and initial H₂S concentration in the fixed-bed reactor. The experimental results show that H₂S could be removed to 2×10^-6 by the sorbents sintered at 1 100 ℃,also showing good mechanical strength. Desulfurization of the sorbent performed at 700 ℃ was shown to have the best performance, and sulfur capacity was 31.8%. H₂S concentration in the outlet gas from reactor increased with the presence of CO₂ that increased the oxygen potential. The concentration of H2S in the outlet increased from 2×10^-6 to 20×10^-6 when CO² content increased from 0% to 4.53%. The desulfurization precision did not vary with the increase of initial H₂S concentration, while the duration of the breakthrough period was cut shorter.