| La1-xSrxMnO3催化剂催化CH4选择性还原NO的实验研究 |
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| 作者姓名： | 张航 黄思嘉 李娜 周屈兰 |
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| 作者单位： | 1. 西安交通大学动力工程多相流国家重点实验室, 西安 710049;
2. 福建省电力勘测设计院, 福州 350003 |
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| 基金项目： | 江苏省自然科学基金(BK20130459)资助 |
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| 摘 要： | 采用溶胶-凝胶法和过量浸渍法制备粉末状及负载型La(1-x)SrxMnO3 (x=0.2、0.4)催化剂.SEM表征表明La0.8Sr0.2MnO3催化剂具有连续多孔结构.在设计的固定床反应器中,实验测试表明La0.8Sr0.2MnO3在900~1 000 ℃、停留时间大于2.2 s、含氧量小于6%时的NO脱除率达到90%以上,而La0.6Sr0.4MnO3的高活性反应条件与La0.8Sr0.2MnO3相似.在低温区,La0.6Sr0.4MnO3的NO脱除率在600 ℃时达到40%,而La0.8Sr0.2MnO3只有20%.根据实验结果计算了两种催化剂无氧反应条件下的活化能.La0.6Sr0.4MnO3为催化剂的反应活化能比La0.8Sr0.2MnO3为催化剂时低.
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| 关 键 词： | 钙钛矿 甲烷 一氧化氮 选择性催化还原 |
| 收稿时间： | 2015-03-13 |
| 修稿时间： | 2015-07-07 |
Selective catalytic reduction of NO with CH4 on La1-xSrxMnO3 catalysts |
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| Authors: | ZHANG Hang HUANG Sijia LI Na ZHOU Qulan |
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| Institution: | 1. State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China;
2. Fujian Electric Power Survey & Design Institute, Fuzhou 350003, China |
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| Abstract: | The perovskite catalysts La1-xSrxMnO3 (x=0.2, 0.4) powders and supported catalysts via sol-gel method were successfully synthesized. The images of SEM show that La0.8Sr0.2MnO3 had a continuous and complete porous structure. The catalytic activity of supported La1-xSrxMnO3 catalyst was tested in fixed bed reactor. The NO conversion ratio of La0.8Sr0.2MnO3 was above 90% when the duration was longer than 2.2 s, the O2 concentration was less than 6%, and the temperature was around 900-1 000 ℃, and La0.6Sr0.4MnO3 acted similarly. At 600 ℃ the NO conversion ratio of La0.6Sr0.4MnO3 was up to 40%, while the ratio of La0.8Sr0.2MnO3 was only 20%. Besides, the activation energies for these two catalysts were calculated, and the activation energy for La0.6Sr0.4MnO3 was lower than that for La0.8Sr0.2MnO3. |
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| Keywords: | perovskite methane NO selective catalytic reduction |
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