Shang Hongshan, Yang Fan, Kou Yuan
College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China.
Huan Jing Ke Xue. 2003 Nov;24(6):68-73.
A series of SO2 sorbents 5%-90% (mass percent) Na2CO3/straw were prepared by conventional incipient wetness impregnation of straw with an aqueous solution of Na2CO3. It was showed that small particle size (< or = 0.28 mm) of the straw and low flow rate (40 mL/min) of the feed gas favor the removal of SO2, while temperature (70 degrees C-300 degrees C) has little effect on the desulfurization efficiency. Based on XRD, SEM and ATR-IR analysis it can be concluded that the Na2CO3 on the surface of the straw is mainly in an amorphous state. The unique structural features of the straw and its interaction with Na2CO3 lead to the amorphous structure having greater surface area (12.14 m2/g) and pore volume (0.093 cm3/g) with a high loading of Na2CO3.
通过用碳酸钠水溶液对秸秆进行传统的初湿浸渍法，制备了一系列质量分数为5%-90%的Na₂CO₃/秸秆SO₂吸附剂。结果表明，秸秆的小粒径（≤0.28 mm）和低进料气流量（40 mL/min）有利于SO₂的去除，而温度（70℃-300℃）对脱硫效率影响不大。基于XRD、SEM和ATR-IR分析，可以得出秸秆表面的Na₂CO₃主要处于无定形状态。秸秆独特的结构特征及其与Na₂CO₃的相互作用导致该无定形结构具有更大的表面积（12.14 m²/g）和孔体积（0.093 cm³/g）以及高负载量的Na₂CO₃。
