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均匀粒径堆体积热导率的实验研究 总被引:1,自引:0,他引:1
利用断电热线法对均匀颗粒散体的热导率进行了实验研究,以考查颗粒尺寸对热导率的影响,在以煤粉炉尾部受热面煤灰为试样的实验中得到了不同尺寸颗粒的自然堆积热导率、同尺寸颗粒不同堆积密度的热导率曲线。 相似文献
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CARBON DEPOSITION AND CATALYST DEACTIVATION OF Sb-Fe OXIDE CATALYST IN THE AMMOXIDATION OF PROPYLENE
Carbon deposition and catalyst deactivation of Sb-Fe oxide catalyst in the ammoxidation of propylenewere investigated by means of a fluidized-bed reactor.The reactivity,surface acidity,specific surfacearea,average pore radius,and electron spin resonance spectrum data were obtained from the catalysts ofincreasing carbon deposition.Chemisorption of oxygen and propylene and thermal programmed desorptionof propylene were carried out on the Sb-Fe oxide catalyst as well as a commercial one,Mo-Bi.Isotopicexperiment using acrylonitrile-2-~(14)C as tracer was also accomplished.It was found that carbon deposition due to intermediates and acrylonitrile on selective oxidation sitescould be the primary reason for catalyst deactivation,and that because of the Sb-Fe oxide catalytspossessing a property of easy reduction and difficult reoxidation,the structure of the FeSbO_4 would bedecomposed under the oxygen-lean condition into Sb_2O_3 and Fe_2O_3 which form the deep oxidation catalystcomponent.According to the above investigation a suggestion for improving catalyst properties has been proposed. 相似文献
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赵景林 《计算机技术与发展》2001,11(5)
本文分析了JDBC的体系结构,介绍了利用JDBC访问面向Internet的数据库的Java Applet结构框架,给出了带有通用性的Java Applet程序实例. 相似文献
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本文分析了JDBC的体系结构,介绍了利用JDBC访问面向Internet的数据库的Java Applet结构框架,给出了带有通用性的Java Applet程序实例。 相似文献
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阳离子交换器失效监督的新方法赵景林王中甲[东北电力学院(动力工程系)(应用化学系),吉林132012]0引言在现代的火力发电厂中水的品质的好坏直接影响到锅炉能否安全经济运行,而阳离子交换器对改善水质起重要的作用。目前对阳离子交换器失效监督仍然没有一个... 相似文献
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