【摘要】 研制出用于脱除烟道气中二氧化硫的活性焦并进行了评价,选择出一种脱硫性能较好的活性焦,其硫容可达130mgSO2gAC以上。进而,考察了工艺参数对其脱硫性能的影响,在烟气中的二氧化硫浓度为01%～015%,反应温度为55℃～60℃,空速为1000h-1,体积分数O2为6%,H2O(g)(v%)8%的情况下,该活性焦保持SO2转化率在90%以上的时间达15h以上;同时,也探讨了SO2在活性焦上转化为H2SO4的机理。更多还原

【Abstract】 The contamination of environment caused by SO 2 from flue gas has been a major problem in China and the government pays much attention to it One of effective and economical ways to remove SO 2 from flue gas is using active coke to adsorb and convert it into H 2SO 4 in the presence of O 2 and water vapor It is found that an active coke made by our lab has good ability to remove SO 2 from flue gas and its sulfur capacity is up to 130mg SO 2/gAC Moreover, the effects of experimental parameters on the adsorption capacity of the active coke were investigated Maintaining removal of above 90% of SO 2 was achieved for more than 15 hours under the optimal condition (adsorption temperature 55-60℃, space velocity 1000h -1 , the model flue gas consisting of SO 2 1000-1500ppm(v/v), O 2 6%(v/v), H 2O(g) 8%(v/v), N 2 the others) At the same time, it was found that the properties (specific surface area, micropore volume, pore texture and surface characterization) determined the desulfurization ability of the active coke Larger surface area, pore volume, suitable pore texture and more surface basic functional groups could promote greatly the desulfurization ability of the active coke The results also showed that micropore was the main place where SO 2 was adsorbed and oxidized into sulfuric acid in the presence of oxygen and water vapor更多还原