摘要
以离子交换法制备的NH4 β分子筛为催化剂 ,考察在无氨、有氨及SO2 存在等不同条件下NO低温选择催化还原性能 ,并通过程序升温分解反应研究NH+ 4消耗引起的催化剂失活 ,NH3 程序升温脱附 (NH3 TPD)研究催化剂的再生性能 。
The selective catalytic reduction(SCR) of NO in oxygen excess is studied on beta zeolite in the NH + 4 form at temperatures from 30 to 250?℃ In absence of gaseous ammonia, the conversion of NO is 100% in the whole range of temperatures The reaction proceeds with the consumption of NH + 4 ions thereby converting the zeolite into its H + form The consumed NH + 4 ions can be easily replenished by admission of gaseous ammonia at reaction temperature or room temperature This reaction as present here might become a viable technology for removal of NOx at low temperature without addition of reducing agents In presence of ammonia, the complete conversion of NO is obtained above 230?℃ The mechanism of the SCR might be different in the presence and absence of gaseous ammonia The reaction is also found to proceed with good efficiency in the presence of SO2
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2001年第z1期63-65,共3页
Journal of Fuel Chemistry and Technology
基金
山西省自然科学基金 ( 9910 32 )~~
