关键词: 堇青石;造孔剂;多孔陶瓷;酸处理;脱硝催化剂

Abstract: Porous cordierite ceramic was prepared by compression molding method with raw materials meta-kaolin, Al2O3 and talc and the denitration catalyst was obtained with impregnation coating method.The porosity, bending strength, thermal expansion coefficients, SEM, BET and other testing methods were used to investigate the effect of porous cordierite ceramics including type and content of the pore-forming agent and acid treatment.The catalytic performance was investigated with different loading rates between 80 ℃ and 200 ℃.The results show the cordierite owned excellent performance with the addition of carbon at 4%.In this condition, the porosity, bending strength and thermal expansion coefficients can reach 31.12%, 21.41 MPa, 3.10×10-6/K respectively.2 h is a perfect acid treatment time that can rich surface pore structure and enlarge surface area significantly.The integral denitration catalyst is obtained with excellent performance at low temperature when the impregnation time is 4.The firmness can be 90.18% and its efficiency of denitration will be 74.5% at 140 ℃.

Key words: cordierite;pore-forming agent;porous ceramic;acid treatment;catalystic denitration