Abstract: Using the residue of tobacco stem which had extracted as material,a new modified porous material was prepared by fermentation pretreatment, microwave drying and granulation, semi-carbonation and KOH modification. The surface morphology, specific surface area and pore structure of semi-carbonized porous materials were characterized by scanning electron microscope （SEM）, specific surface area and pore analyzer. The results showed that the surface of the modified porous materials was typical porous structure which mainly was based on a large number of cavities and pores. The material had high specific surface area and pore volume. Compared to the control cigarettes, the filter rod with modified porous material can reduce the tar and the seven hazardous substances of the cigarette smoke. The sensory quality showed that the material could make the cigarette smoke soften and finer.

Key words: tobacco stem, residue, modification, porous material, adsorption, sensory quality