| 低温等离子体改性LaCoO_3催化剂去除炭烟颗粒的催化性能 |
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| 引用本文： | 孙禾,刘诗鑫,于学华,赵震.低温等离子体改性LaCoO_3催化剂去除炭烟颗粒的催化性能[J].工业催化,2018,26(11):36-40. |
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| 作者姓名： | 孙禾 刘诗鑫 于学华 赵震 |
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| 作者单位： | 1.沈阳师范大学化学化工学院,辽宁 沈阳 110034;2.中国石油大学(北京)重质油国家重点实验室,北京 102249 |
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| 摘 要： | 采用低温等离子体对LaCoO_3复合氧化物进行表面改性,利用XRD、FT-IR、H2-TPR和O_2-TPD等对催化剂表面物化性能进行表征,分析等离子体对催化剂表面物化性质的影响。采用程序升温氧化反应评价催化剂对模拟柴油机炭烟催化氧化的活性。结果表明,等离子体改性促进了催化剂表面晶格氧的活化,增加了活性氧物种数目,从而增强了催化剂对炭烟催化氧化活性,炭烟催化起燃温度Ti由278℃降到274℃,峰值温度Tm由354℃降至345℃,燃尽温度Tf由425℃降至386℃。
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| 关 键 词： | 催化化学 炭烟颗粒 等离子体 改性 炭烟氧化 催化性能 |
Catalytic performance of plasma-modified LaCoO3 catalyst for removal of soot particles |
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| Sun He,Liu Shixin,Yu Xuehua,Zhao Zhen.Catalytic performance of plasma-modified LaCoO3 catalyst for removal of soot particles[J].Industrial Catalysis,2018,26(11):36-40. |
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| Authors: | Sun He Liu Shixin Yu Xuehua Zhao Zhen |
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| Affiliation: | 1.Institute of Catalysis for Energy and Environment,College of Chemistry and Chemical Engineering, Shenyang Normal University,Shenyang 110034,Liaoning,China;2.State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China |
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| Abstract: | LaCoO3 composite oxides were modified by low temperature plasma.The physicochemical properties of the catalyst surface were characterized by means of XRD,H2-TPR,O2-TPD,FT-IR to analyze effect of plasma on surface character of the catalyst.Catalytic activities of the catalyst for oxidation of simulated diesel soot were evaluated by temperature-programmed oxidation reaction.The experimental results showed that plasma modification promoted activation of lattice oxygen on the surface of the catalyst,increased the number of reactive oxygen species,and enhanced the catalytic oxidation activity of the catalyst for soot removal.The ignition temperature Ti decreased from 278 ℃ to 274 ℃,the peak temperature Tm reduced from 354 ℃ to 345 ℃ and the finishing combustion temperature Tf reduced from 425 ℃ to 386 ℃. |
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| Keywords: | catalytic chemistry soot particle plasma modification soot oxidation catalytic performance |
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