摘要
目前在冶炼烟气治理脱硝中使用的NH3-SCR催化剂存在操作温度窗口窄、低温(120 ℃)下催化活性不高、易中毒等不足,限制了其广泛应用.因此,开发低温高效、抗中毒性能好、稳定性强的催化剂成为当前研究重点.碳基催化剂由于其来源广泛、吸附性能强、催化活性好等优点备受关注,在脱硝方面有广阔的前景.本文基于碳基低温NH3-SCR催化剂的最新研究进展,从碳基催化剂材料、添加活性组分、酸碱改性、抗SO2与H2O中毒与等方面介绍了影响催化剂脱硝活性的因素,分析了碳基催化剂的NH3-SCR脱硝反应机理,并提出利于研发低温NH3-SCR脱硝性能优异、抗中毒性能好的碳基催化剂的方向.
Abstract
At present,the NH3-SCR catalyst used in smelting flue gas treatment and denitrification has short-comings such as narrow operating temperature window,low catalytic activity at low temperature(120 ℃),and easy poisoning,which limits its wide application.Therefore,the development of catalysts with low temperature efficiency,good anti-toxicity performance and strong stability has become the focus of current research.Carbon-based catalysts have attracted much attention due to their wide range of sources,strong adsorption perform-ance,and good catalytic activity,and have broad prospects in denitrification.Based on the latest research pro-gress of carbon-based low-temperature NH3-SCR catalysts,the factors influencing the denitrification activity of catalysts were introduced from the aspects of carbon-based catalyst materials,addition of active components,acid or base modification,resistance to SO2 and H2O poisoning,and the NH3-SCR reaction mechanism of car-bon-based catalysts is analyzed,and the direction of carbon-based catalysts with excellent denitrification per-formance and anti-poisoning performance of low-temperature NH3-SCR is proposed.
基金项目
陕西省科技厅重点研发计划项目(2024GX-YBXM-422)
榆林市科技局产学研合作项目(2023-CXY-194)
陕西省创新能力支撑计划项目(2023-CX-TD-53)
万方数据