| 锂和镧的添加对NiO/Al_2O_3甲烷部分氧化积炭的影响 |
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| 引用本文： | 刘盛林,熊国兴.锂和镧的添加对NiO/Al_2O_3甲烷部分氧化积炭的影响[J].天然气化工,1998,23(5):5-7. |
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| 作者姓名： | 刘盛林 熊国兴 |
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| 作者单位： | 中科院大连化学物理研究所催化基础国家重点实验室 |
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| 摘 要： | 采用ＮＨ３－ＴＰＤ技术考察了ＮｉＯ／Ａｌ２Ｏ３表面酸性，发现Ｌｉ和Ｌａ的添加使催化剂的表面酸性强度和酸性中心数目低于相应的ＮｉＯ／Ａｌ２Ｏ３。同时利用ＴＧ、ＴＰＯ－ＭＳ、ＸＰＳ等技术考察了ＮｉＯ／Ａｌ２Ｏ３和ＬｉＮｉＬａＯ／Ａｌ２Ｏ３上的甲烷部分氧化制合成气积炭情况。发现Ｌｉ和Ｌａ的添加显著提高了催化剂的抗积炭能力。ＬｉＮｉＬａＯ／Ａｌ２Ｏ３上甲烷部分氧化反应寿命实验表明，反应连续进行２００ｈ，ＣＨ４转化率一直保持不变，这说明Ｌｉ和Ｌａ的添加还可以提高ＮｉＯ／Ａｌ２Ｏ３的热稳定性。
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| 关 键 词： | 甲烷部分氧化 积炭 热稳定性 NiO／Al_2O_3 LiNiLaO／Al_2O_3 |
Effects of Li 2O and La 2O 3 on carbon deposition on a nickel based catalyst for partial oxidation of methane to syngas |
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| Liu Shenglin,Xiong Guoxing,Miao Qing Zhang Yuhong,Sheng Shishan.Effects of Li 2O and La 2O 3 on carbon deposition on a nickel based catalyst for partial oxidation of methane to syngas[J].Natural Gas Chemical Industry,1998,23(5):5-7. |
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| Authors: | Liu Shenglin Xiong Guoxing Miao Qing Zhang Yuhong Sheng Shishan |
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| Abstract: | The acid base properties and carbon deposition of NiO/Al 2O 3 and LiNiLaO/Al 2O 3 catalysts for partial oxidation of methane to syngas have been studied by using NH 3 TPD, TG, TPO MS, and XPS techniques. It is found that the surface acid strength of LiNiLaO/Al 2O 3 is much smaller than that of NiO/Al 2O 3. Addition of Li 2O and La 2O 3 has enhanced the ability to suppress carbon deposition on a nickel based catalyst. Methane conversion keeps constant during 200h life test for partial oxidation of methane over LiNiLaO/Al 2O 3, indicating that introduction of Li 2O and La 2O 3 can also enhance the thermal stability of the nickel based catalyst. |
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| Keywords: | partial oxidation of methane carbon deposition thermal stability NiO/Al 2O 3 LiNiLaO/Al 2O 3 |
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