In_(2)O_(3)对工业V_(2)O_(5)-MoO_(3)/TiO_(2)脱硝催化剂性能的影响

Effect of In_(2)O_(3) on performance of industrial denitration catalyst V_(2)O_(5)-MoO_(3)/TiO_(2)

采用浸渍法制备了V2O5-MoO3-In2O3/TiO2脱硝催化剂,通过XRD、N2-吸附脱附、H2-TPR、NH3-TPD、O2-TPD等技术表征了催化剂的物化性能,通过固定床反应器考察了催化剂的脱硝性能。表征结果表明,In2O3的负载使V2O5-MoO3/TiO2催化剂的比表面积和孔体积略有降低、孔径略有提升,但没有改变V2O5-MoO3/TiO2催化剂的晶型结构及载体的孔道结构。催化剂的脱硝性能评价实验结果显示,In2O3的负载提升了催化剂的还原性能,增强了催化剂的表面酸性,从而提高了催化剂的脱硝活性。In2O3的存在提高了催化剂的抗SO2/H2O蒸气的性能,催化剂的高温抗SO2/H2O蒸气性能优于低温状态下。

V2O5-MoO3-In2O3/TiO2 denitration catalysts were prepared by impregnation method.The physical and chemical properties of the catalyst were characterized by XRD,N2-adsorption desorption,H2-TPR,NH3-TPD,O2-TPD,etc.The denitration performance of the catalyst was investigated in a fixed-bed reactor.The characterization results show that with the loading of In2O3,the specific surface area and pore volume of V2O5-MoO3/TiO2 catalyst decreased slightly and the pore size increased slightly,but the crystal structure of the catalyst and pore structure of the support have no change.The experimental results of denitration performance evaluation of the catalyst show that with the loading of In2O3,the reduction capability of the catalyst is improved and the surface acidity of the catalystis enhanced,thus the denitration activity of the catalyst is improved.The presence of In2O3 improves its resistance to SO2/H2O vapor,and then its resistance to SO2/H2O vapor at high temperature is better than that at low temperature.