载硫活性炭微观结构和表面形态研究

为了增强活性炭脱除燃煤电厂烟气中汞的能力，利用汞和硫可以生成稳定的HgS的性质，研究了通过热沉淀增加了活性炭中的硫含量的改性方法，并以SEM、BET、TGA等方法，研究了改性对活性炭表面形貌、硫在活性炭中的分布、活性炭比表面积等性能的影响。结果表明，热沉淀改性方法可以增加活性炭中的硫含量；硫粘附在活性炭的炭链上量较多，孔壁较少；改性工艺降低了活性炭的比表面积，且改性活性炭的比表面积随着温度的升高而增大；载硫后，活性炭中元素硫和炭的结合被增强。

Research on microstructure and surface morphology of sulfur-loading active carbon

Hg can react with sulfur to form HgS which is stable. To remove mercury in fuel gas from coal combustion plant, sulfur content in active carbon was increased by thermal deposition in this work. SEM, BET, TGA and other measurement methods were used to characterize the effect on surface morphology, sulfur distribution and specific surface. The experimental results showed that thermal deposition was effective in increasing sulfur content in active carbon; most sulfur was adhered on the carbon chain and little was on the wall of pore; specific surface was decreased though deposition and it increased with temperature increase; binding between carbon and sulfur molecular was increased.