The removal of fine particles (PM2.5) emitted from coal combustion is of environmental concern because of increasing clean air demands and their relevance with regard to the deposition of heavy metals and toxic components [1–4]. In contrast to the efficient separation of micron particles from flue gas by conventional separators, such as venture scrubbers, electrostatic precipitators, and filters, highly efficient technical separation of fine particles from gases is difficult and expensive [5]. Large amounts of fine particles are emitted into the ambient air and give a great threat to human
health [6]. Therefore, control of fine particles by improving the removal effect of present flue gas cleaning systems, and developing multi-pollutant control processes would be a significant technological achievement in this field.