Liu Jie-Ling, Tang Zheng-Guang, Chen Jie, Jiang Wen-Ju, Jiang Xia
College of Architecture and Environment, Sichuan University, Chengdu 610065, China.
Huan Jing Ke Xue. 2013 Apr;34(4):1623-7.
A novel biomass columnar activated carbon was prepared from walnut shell and pyrolusite was added as a catalyst. The activated carbon prepared was used for flue gas desulphurization in a fixed-bed reactor with 16 g of activated carbon. The impact of operating parameters such as SO2 inlet concentration, space velocity, bed temperature, moisture content and O2 concentration on the desulfurization efficiency of activated carbon was investigated. The results showed that both the breakthrough sulfur capacity and breakthrough time of activated carbon decreased with the increase of SO2 inlet concentration within the range of 0.1% -0.3%. The breakthrough sulfur capacity deceased with the increase of space velocity, with optimal space velocity of 600 h(-1). The optimal bed temperature was 80 degrees C, and the desulfurization efficiency can be reduced if the temperature continue to increase. The presence of moisture and oxygen greatly promoted the adsorption of SO2 onto the activated carbon. The best moisture content was 10%. When the oxygen concentrations were between 10% and 13%, the desulfurization performance of activated carbon was the highest. Under the optimal operating conditions, the sulfur capacity of activated carbon was 252 mg x g(-1), and the breakthrough time was up to 26 h when the SO2 inlet concentration was 0.2%.
以核桃壳为原料，添加软锰矿作为催化剂制备了一种新型生物质柱状活性炭。将制备的活性炭用于固定床反应器中的烟气脱硫，活性炭用量为16 g。考察了SO2进口浓度、空速、床层温度、水分含量和O2浓度等操作参数对活性炭脱硫效率的影响。结果表明，在0.1%-0.3%范围内，随着SO2进口浓度的增加，活性炭的穿透硫容量和穿透时间均降低。穿透硫容量随空速的增加而降低，最佳空速为600 h(-1)。最佳床层温度为80℃，温度继续升高脱硫效率会降低。水分和氧气的存在极大地促进了SO2在活性炭上的吸附。最佳水分含量为10%。当氧气浓度在10%至13%之间时，活性炭的脱硫性能最高。在最佳操作条件下，活性炭的硫容量为252 mg x g(-1)，当SO2进口浓度为0.2%时，穿透时间可达26 h。
