| 载铁改性沸石粉体抑制甲烷/空气扩散火焰试验研究 |
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| 引用本文： | 倪小敏,况凯骞,杨冬雷,廖光煊. 载铁改性沸石粉体抑制甲烷/空气扩散火焰试验研究[J]. 中国安全科学学报, 2012, 22(1): 53-57 |
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| 作者姓名： | 倪小敏 况凯骞 杨冬雷 廖光煊 |
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| 作者单位： | 1. 中国科学技术大学苏州研究院,苏州市城市公共安全重点实验室,江苏苏州215123;中国科学技术大学火灾科学国家重点实验室,安徽合肥230026
2. 中国科学技术大学火灾科学国家重点实验室,安徽合肥230026;广州中国科学院工业技术研究院城市公共安全技术研究中心,广东广州511458 |
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| 基金项目： | 江苏省自然科学基金资助(BK2009151) |
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| 摘 要： | 为发展洁净高效新型粉体灭火介质,以沸石粉体为基体,采用盐酸活化和氯化铁溶液浸泡方法制备载铁改性沸石粉体灭火剂。采用X-射线衍射仪(XRD)、扫描电镜(SEM)和X-射线荧光光谱仪(XRF)等仪器对该粉体灭火剂的结构和形貌进行表征。通过小尺度的杯式燃烧器试验研究载铁沸石粉体对甲烷/空气扩散火焰的灭火效果,并和未改性沸石粉体进行对比。试验结果表明,载铁改性沸石粉体灭火剂的灭火效能明显高于未改性沸石粉体。改性沸石灭火效能提高,主要是由于所负载的铁离子在火焰中转化为活性铁原子,参与清除火焰自由基的催化反应。
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| 关 键 词： | 干粉灭火剂 改性沸石 杯式燃烧器 灭火 扩散火焰 |
Experimental Study on the Suppression of Methane/Air Diffusion Flame by Iron-modified Zeolite Powders |
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| NI Xiao-min , KUANG Kai-qian , YANG Dong-lei , LIAO Guang-xuan. Experimental Study on the Suppression of Methane/Air Diffusion Flame by Iron-modified Zeolite Powders[J]. China Safety Science Journal, 2012, 22(1): 53-57 |
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| Authors: | NI Xiao-min KUANG Kai-qian YANG Dong-lei LIAO Guang-xuan |
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| Affiliation: | 1,2(1 Suzhou Key Laboratory of Urban Public Safety,Suzhou Institute of University of Science and Technology of China,Suzhou Jiangsu 215123,China 2 State Key Laboratory of Fire Science, University of Science and Technology of China,Hefei Anhui 230026,China 3 Research Center of Urban Public Safety,Institute of Industry Technology Guangzhou & Chinese Academy of Sciences,Guangzhou Guangdong 511458,China) |
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| Abstract: | A new type of iron-modified zeolite particles as dry powder fire suppressants was prepared via an acidification and soaking process.The powders were characterized with a series of instruments of XRD(X-ray diffractometer),SEM(scanning electron microscopy),XRF(X-ray fluorescence spectrometer),etc.Fire suppression performance of the iron-modified zeolite powders was investigated through a bench-scale cup-burner apparatus with methane/air coflow diffusion flame.Results showed that the iron-modified zeolite powders exhibited much better performance than that of zeolite particles without iron loading,giving much lower fire extinguishing concentration.The improvement in fire suppression capability could be ascribed to the chemical effect of iron in scavenging the combustion radicals. |
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| Keywords: | dry powders iron-modified zeolite cup-burner fire suppression diffusion flame |
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