H<sub>2</sub>O和SO<sub>2</sub>对Ce(1)Mn(3)Ti催化剂催化氧化NO性能的影响

李小海; 张舒乐; 贾勇; 钟秦

H₂O和SO₂对Ce(1)Mn(3)Ti催化剂催化氧化NO性能的影响

李小海^1,2,
张舒乐¹,
贾勇¹,
钟秦^1,

1.
南京理工大学化工学院, 江苏南京 210094;
2.
大唐南京环保科技有限责任公司, 江苏南京 211100

基金项目: 国家自然科学基金(U1162119, 51078185); 高等学校博士学科点专项科研基金(20113219110009); 江苏省新型环保重点实验室开放课题基金(AE201001)。

详细信息

通讯作者:
钟秦, Tel: 025-84315517;Fax: 025-84315517; E- mail: zq304@mail.njust.edu.cn.

中图分类号: X511
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出版历程
- 收稿日期: 2011-10-24
- 修回日期: 2011-12-09
- 刊出日期: 2012-07-31

Effects of H₂O and SO₂on a Ce(1)Mn(3)Ti catalyst for NO catalytic oxidation

1.
School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2.
Datang Nanjing Environmental Protection Technology Co., Ltd, Nanjing 211100, China

摘要

摘要: 为了提高MNO_x/TiO₂催化剂催化氧化NO的活性,在载体TiO₂上负载醋酸锰的同时掺杂了一定量的硝酸铈,构成了Ce(1)Mn(3)Ti催化剂,并对催化剂进行XRD、BET和XPS等表征。重点考察了H₂O和SO₂对催化剂活性的影响,通过FT-IR、SEM和BET等表征手段对毒化前后的催化剂组成及结构进行了分析。结果表明,Ce(1)Mn(3)Ti催化剂具有较好的活性,在空速41 000 h^-1、NO体积分数为300×10^-6及O₂含量10%的条件下,反应温度200℃时NO转化率可达58%,250℃时NO转化率达到最高值85%。单独加入4%H₂O使得催化剂活性降低,升高反应温度,H₂O对催化剂的影响减弱;同时通入4%H₂O和100×10^-6SO₂,在反应温度250℃时,NO转化率下降并维持在48%左右,停止通入后恢复到61%。H₂O和SO₂使催化剂活性物种硫酸盐化失活。
- NO /
- 催化氧化 /
- 抗硫抗水 /
- Ce掺杂MnO_x/TiO₂
Abstract: In order to improve the activity of catalytic oxidation of NO over MnO_x/TiO₂,a certain amount of cerium nitrate was doped into the catalyst while the MnO_x/TiO₂ catalyst was prepared by impregnation on TiO₂.Ce(1)Mn(3)Ti catalyst was characterized,using XRD,BET and XPS.At the same time,the effects of H₂O and SO₂ on catalytic oxidation of NO were investigated.The deactivation mechanisms in the presence of H₂O and SO₂ were analyzed by FT-IR,SEM and BET.The results showed that Ce(1)Mn(3)Ti yielded a 58% NO conversion at 200℃,and 85% at 250℃ when the space velocity was 41 000 h^-1,O₂ and NO concentrations were 10% and 300×10^-6respectively.The activity of catalyst declined in the presence of only 4% H₂O but this negative effect could be counteracted by increasing the reaction temperature.After in the presence of 4%H₂O and 100×10^-6 SO₂ together,NO conversion was maintained at 48%.The activity of the deactivated catalyst could recover to 61% after removing H₂O and SO₂.H₂O and SO₂ make catalyst deactivation because of the active component has been sulfuric acid stalinization.
- NO /
- catalytic oxidation /
- sulfur resistance and water resistance /
- Ce doped MnO_x/TiO₂

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参考文献(22)

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H₂O和SO₂对Ce(1)Mn(3)Ti催化剂催化氧化NO性能的影响

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钟秦, Tel: 025-84315517;Fax: 025-84315517; E- mail: zq304@mail.njust.edu.cn.

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H2O和SO2对Ce(1)Mn(3)Ti催化剂催化氧化NO性能的影响

通讯作者: 钟秦, Tel: 025-84315517;Fax: 025-84315517; E- mail: zq304@mail.njust.edu.cn.

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Effects of H2O and SO2 on a Ce(1)Mn(3)Ti catalyst for NO catalytic oxidation

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出版历程

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2023年《燃料化学学报（中英文）》评优结果公布！

H₂O和SO₂对Ce(1)Mn(3)Ti催化剂催化氧化NO性能的影响

通讯作者:
钟秦, Tel: 025-84315517;Fax: 025-84315517; E- mail: zq304@mail.njust.edu.cn.

Effects of H₂O and SO₂on a Ce(1)Mn(3)Ti catalyst for NO catalytic oxidation