摘要
通过浸渍方法 ,制备了 5 %～ 90 % (质量分数 )担载量Na2 CO3 /草粉脱硫剂 .实验结果表明 ,较小的草粉粒度(≤ 0 2 8mm)和较低的气体流量 (4 0mL/min)有利于SO2 脱除 ,但是脱硫温度 (70℃～ 30 0℃ )对脱硫效果影响不大 .利用XRD ,SEM ,ATR IR等分析手段 ,研究了草粉改性Na2 CO3 脱硫吸附剂的机理 .实验证明 :改性Na2 CO3吸附剂高效脱硫的机理主要在于吸附剂表面结构的无定形态 ,因而具有比较大的比表面积 (1 2 1 4m2 /g)和孔体积(0 0 93cm3 /g) .
A series of SO 2 sorbents 5%～90%(mass percent) Na 2CO 3/straw were prepared by conventional incipient wetness impregnation of straw with an aqueous solution of Na 2CO 3. It was showed that small particle size (≤0.28mm) of the straw and low flow rate (40mL/min) of the feed gas favor the removal of SO 2, while temperature (70℃～300℃) has little effect on the desulfurization efficiency. Based on XRD, SEM and ATR-IR analysis it can be concluded that the Na 2CO 3 on the surface of the straw is mainly in an amorphous state. The unique structural features of the straw and its interaction with Na 2CO 3 lead to the amorphous structure having greater surface area (12.14m 2/g) and pore volume (0.093cm 3/g) with a high loading of Na 2CO 3.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2003年第6期68-73,共6页
Environmental Science
基金
国家 973重大基础科学研究项目 (G19990 2 2 2 0 2 )
北京市植物资源研究开发重点实验室资助项目
