脱硝催化剂用堇青石多孔陶瓷的制备与性能研究
发布时间：2019-01-11 20:07
【摘要】：以偏高岭土、氧化铝和滑石为原料,利用压制成型制备出堇青石多孔陶瓷并采用浸渍涂覆法制备锰基低温脱硝催化剂。通过气孔率、抗折强度、热膨胀系数、SEM、BET等测试探究了碳粉和淀粉两种造孔剂及添加量、不同酸处理时间等因素对堇青石性能的影响并考察了不同浸渍次数的催化剂在80~200℃间的脱硝性能。结果表明:造孔剂为碳粉且添加量为4%时,得到的堇青石具有良好的性能,此时气孔率达31.12%,热膨胀系数为3.10×10~(-6)/K,抗折强度为21.41 MPa;适当的酸处理有助于堇青石表面孔结构的丰富且能大幅提升其比表面积,最佳处理时间为2 h;当浸渍次数为4次时,整体式催化剂的性能最佳,牢固度可达90.18%,140℃时的脱硝率可达74.5%以上。
[Abstract]:Cordierite porous ceramics were prepared from metakaolin, alumina and talc by pressing molding and manganese based low temperature denitrification catalyst was prepared by impregnation coating method. The porosity, flexural strength, thermal expansion coefficient and SEM,BET test were used to investigate two kinds of pore-making agent and the addition amount of carbon powder and starch. The effect of different acid treatment time on cordierite performance and the denitrification performance of catalyst with different impregnation times at 80 鈩，
本文编号：2407411
[Abstract]:Cordierite porous ceramics were prepared from metakaolin, alumina and talc by pressing molding and manganese based low temperature denitrification catalyst was prepared by impregnation coating method. The porosity, flexural strength, thermal expansion coefficient and SEM,BET test were used to investigate two kinds of pore-making agent and the addition amount of carbon powder and starch. The effect of different acid treatment time on cordierite performance and the denitrification performance of catalyst with different impregnation times at 80 鈩，
本文编号：2407411
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