Selective catalytic reduction of NO by NH3 over CuO-CeO2 in the presence of SO2

Li Bo; Ren Zhiyuan; Ma ZhaoxiaHuang XiaodongLiu FuZhang XiaobinYang Hangsheng

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Selective catalytic reduction of NO by NH3 over CuO-CeO2 in the presence of SO2

机译：没有了NH3的选择性催化还原CuO-CeO2二氧化硫的存在

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SO2-induced deactivation of selective catalytic reduction of NO over CuO-CeO2 was studied. In the case of reaction under low O-2 concentration of 1.0 vol%, SO2 severely deactivated the catalyst at 240 degrees C with a surface S atomic concentration as low as 1.34%. However, the deactivated catalyst could be reactivated during online NO reduction under 5.0 vol% O-2 without decreasing the surface S concentration of the catalyst, which could be attributed to the involvement of NO2 in the reactions. NO2 could promote the NO removal through three reaction routes: fast SCR reaction, reaction between NO2 and NH3, and reaction between NO2 and NH4+. Especially under conditions of 10% O2, the reaction between NO2 and NH3/NH4+ induced the formation of extra NHX<3 species which promoted the decomposition of surface-deposited sulfate to SO2 with the assistance of Ce2O3, further suppressed the accumulation of sulfate on the catalyst surface, and finally suppressed the SO2-induced catalyst deactivation.

机译：SO2-induced选择性催化失活减少不超过CuO-CeO2进行了研究。在低浓度0 2的反应1.0卷%,二氧化硫严重失效催化剂在240摄氏度的表面原子浓度低至1.34%。停用期间可以重新激活催化剂网上没有减少5.0卷% 0 2减少表面浓度催化剂,这可能归因于参与NO2的反应。通过三种反应促进没有删除路线:快速可控硅反应,NO2之间的反应NO2和NH3和反应之间和NH4 +。特别是氧气的条件下为10%,之间的反应NO2和NH3 / NH4 +诱导形成的额外NHX < 3种晋升surface-deposited硫酸盐的分解二氧化硫Ce2O3的协助下,进一步抑制硫酸盐的的积累催化剂表面,最后压制SO2-induced催化剂失活。

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来源
《Catalysis science & technology》 |2016年第6期|1719-1725|共7页
作者
Li Bo; Ren Zhiyuan; Ma ZhaoxiaHuang XiaodongLiu FuZhang XiaobinYang Hangsheng;
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作者单位

Minist Environm Protect China, Foreign Econ Cooperat Off, Houyingfang Hutong 5, Beijing 100035, Peoples R China;

Zhejiang Univ, State Key Lab Silicon Mat, Sch Mat Sci & Engn, Zheda Rd 38, Hangzhou 310027, Peoples R China;

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正文语种英语
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Selective catalytic reduction (SCR); REACTION; CatalystsNitrogen DioxideammoniaNOBELIUMInorganic SulfatesCatalyst deactivationSulfur Dioxide;

机译：选择性催化还原(SCR);反应;CatalystsNitrogenDioxideammoniaNOBELIUMInorganic SulfatesCatalystdeactivationSulfur二氧化碳;

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3. Enhanced selective catalytic reduction of NO with NH3 via porous micro-spherical aggregates of Mn–Ce–Fe–Ti mixed oxide nanoparticles [J] . Junqi Tian, Ke Zhang, Wei Wang, 绿色能源与环境：英文版 . 2019,第003期
4. Novel synthesis of fly-ash-derived Cu-loaded SAPO-34 catalysts and their use in selective catalytic reduction of NO with NH3 [J] . Ge Li, Baodong Wang, Qi Sun, 绿色能源与环境（英文） . 2019,第004期
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机译：SO2和NH3在（盐+ H2O）中的同时溶解度和（SO2 + NH3 +盐+ H2O）在（盐+ H2O）中的稀释后的焓变{盐=（NH4）（2）SO4或Na2SO4}：实验结果和模型预测
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Selective catalytic reduction of NO by NH3 over CuO-CeO2 in the presence of SO2

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