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Restraining NO_x Formation during Coal Combustion in Packed Bed

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International Journal of Minerals,Metallurgy and Materials 1998年第2期12卷 70-74页

作者： Shengli Wu Chunbao Xu qiushuang shou Daqiang Cang Metallurgy School, UST Beijing, Beijing 100083, China Metallurgy School UST Beijing Beijing 100083 China

The effects of various combustion conditions (i. e. particle size of coals, oxygen concentration in combustion gas and coal content in the fuel bed, etc.), on reducing conversion of NO_x during coal combustion were studied. Under the present combustion conditions, coals with smaller particle size gave the lower conversion of NO_x, and as expected that an decrease in overall stoichiometric ratio, whether by an decrease in O_2 content in combustion gas or by an increase in coal content in fuel bed would lead to a lower conversion of NO_x. In order to investigate the effect of metallic oxide layers on restraining NO_x formation, the combustion experiments for coal granules with adhering layer of various metallic oxides including Fe_2O_3, Ni_2O_3 and mixed oxides Fe-Ni-O_x were conducted in a packed bed combustor. The combustion experiments have shown that most of adhering materials gave considerable effect on reduction of NO_x emission during coal combustion.

关键词： coal combustion NO_x formation restraining metallic oxide

Roles of Metallic Oxides in the Elimination Reactions of NO

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International Journal of Minerals,Metallurgy and Materials 1997年第4期11卷 15-18页

作者： XU Chunbao WU Shengli shou qiushuang CANG Daqiang(Metallurgy Engineering School, USTB, Beijing 100083, China)

The catalytic effect of several metallic oxides(Fe2O3, Cr3O3 and Ni2O3) on elimination of NO has been studied in a flow type reactor, and the roles of metallic oxide in the elimination reactions of NO has also been discussed. The results show that in the system of NO-CO-CO2-N2, the catalytic reaction of NO/CO on the metallic oxide plays a leading role in NO elimination especially for Fe2O3 and Cr2O3 samples. However, Ni2O3 and its pre-reduced samples show extremely remarkable catalytic effect on direct decomposition of NO.

关键词： nitrogen oxides catalytic oxide

GEO卫星大型固面反射器背部高频箱热环境分析

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航天器工程 2020年第4期29卷 93-98页

作者：寿秋爽赵啟伟周佐新北京空间飞行器总体设计部空间热控技术北京市重点实验室北京100094

地球静止轨道(GEO)卫星为了改善天线性能,将一些射频设备直接安装在天线反射器背部,为此需要在反射器背部设置一个高频箱。当反射器口径大且为固面时,高频箱所处的外部热环境非常恶劣,外热流成分复杂。文章分析了高频箱不同外热流成分... 详细信息

地球静止轨道(GEO)卫星为了改善天线性能,将一些射频设备直接安装在天线反射器背部,为此需要在反射器背部设置一个高频箱。当反射器口径大且为固面时,高频箱所处的外部热环境非常恶劣,外热流成分复杂。文章分析了高频箱不同外热流成分的影响,包括直接入射太阳光和来自反射器背部的反射光与红外辐射,并通过仿真和理论分析研究了影响高频箱外热流的主要因素。仿真结果表明:来自反射器的红外辐射热流影响更大。为减小高频箱外热流,反射器背部多层隔热组件外表面膜的太阳吸收比应尽可能小且稳定,以减小高频箱温度波动。

关键词：地球静止轨道卫星固面反射器高频箱外热流

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金属氧化物对CO还原NO反应的催化作用

环境科学 1999年第1期20卷 20-32页

作者：徐春保吴胜利苍大强寿秋爽李敏邓勇北京科技大学冶金学院

采用固定床流动反应器，研究ＣｕＯ、Ｃｒ２Ｏ３、ＭｎＯ２、Ｆｅ２Ｏ３、Ｎｉ２Ｏ３等单元金属氧化物及它们形成的复合氧化物对ＣＯ还原ＮＯ反应的催化活性．结果表明，在５００℃８００ｍｌ／ｍ３ＮＯ－０．２％ＣＯ－２．０％ＣＯ２... 详细信息

采用固定床流动反应器，研究ＣｕＯ、Ｃｒ２Ｏ３、ＭｎＯ２、Ｆｅ２Ｏ３、Ｎｉ２Ｏ３等单元金属氧化物及它们形成的复合氧化物对ＣＯ还原ＮＯ反应的催化活性．结果表明，在５００℃８００ｍｌ／ｍ３ＮＯ－０．２％ＣＯ－２．０％ＣＯ２－Ｎ２气氛中ＣＯ还原ＮＯ的能力很小，稳定还原率（ＳＲＲ）仅为１．５０％．所有单元金属氧化物及复合氧化物对ＣＯ还原ＮＯ反应均表现出一定的催化活性，Ｆｅ２Ｏ３、Ｎｉ２Ｏ３、Ｆｅ－Ｎｉ－Ｏｘ、Ｎｉ－Ｃｕ－Ｏｘ、Ｎｉ－Ｃｕ－Ｍｎ－Ｏｘ等对该反应表现出较高的催化活性，ＳＲＲ值分别为１００．００％，９６．１０％，１００．００％，１００．００％和１００．００％．初步探讨了金属氧化物对ＣＯ还原ＮＯ反应的催化机理符合Ｒｅｄｏｘ机理．

关键词：金属氧化物催化一氧化碳一氧化氮废气处理