【摘要】 本文以四种不同品位天然锰矿作为催化剂,系统地研究了天然锰矿NH₃低温选择性催化还原NO活性。通过X-射线衍射、比表面积分析、扫描电镜和程序升温脱附等方法对催化剂的物化性能进行了表征。研究结果表明:天然锰矿具有良好的脱硝性能,且随着锰矿品位降低,锰矿脱硝效果变好,其中低品位天然锰矿C^# 锰矿的脱硝效果较佳,在150～250℃范围内,脱硝率保持在95%以上,是一种稳定性高、环境友好、制作简单、成本低的催化剂。更多还原

【Abstract】 Four different grades of natural manganese ores were used as catalysts to systematically study the performance of selective catalytic reduction （SCR） of NO with NH₃ at low temperature.The physical and chemical properties of catalysts were characterized by X-ray diffraction,Brunauer-Emmett–Teller （BET） specific surface area analysis,scanning electron microscopy （SEM）,and NH₃ temperature programmed desorption methods.The results showed that natural manganese ore has a good low-temperature denitrification activity,and with the reduction of manganese ore grade,the denitrification effect of manganese ore is better.The low-grade natural manganese ore （C^# ore） has the best NO conversion ratio,which more maintains than 95% in the range of 150 ～250℃ Denitrification;Natural manganese ore;Selective catalytic reduction （SCR）;Nitrogen oxides.It could be a novel catalyst in terms of stability,environmental friendliness,simple production,good efficiency and low cost.更多还原