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FTIR 发射/透射光谱对含颗粒气流的温度测量 总被引:2,自引:2,他引:2
在改进的FTIR和自制的微量给粉加热/燃烧实验装置上,对粘土颗粒气流和煤粉火焰进行了FTIR发射/透射测量。通过发射/透射光谱可以得到颗粒温度和气体温度,其相对误差小于5%,满足实验室和工业测温要求。当被测样品中存在碳黑和其它颗粒时,基于碳黑的吸收特性,给出了消除碳黑辐射影响的一种近似处理方法,即将吸收光谱外推至0cm^-1,以0cm^-1处的数值为准对整个光谱进行校正,所得光谱就认为是去除碳黑影响后的吸收光谱.对于CO2气体温度,研究表明,可以用通过CO2峰值的黑体理论曲线来简单估计.研究还发现炭粒温度可以高出气体温度200—300K,一个可能的原因是CO在颗粒边界层点燃引起了颗粒温度突然升高并高于气体温度,对这种现象的理论解释和更多的实验验证尚需进一步展开。 相似文献
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FTIR发射—透射光谱法测量CO2和碳黑的温度 总被引:1,自引:0,他引:1
《燃烧科学与技术》2003,9(4):372-375
对傅立叶红外光谱仪发射-透射(FTIR
E-T)测量技术进行理论和实验研究.理论分析表明,样品厚度为光学薄、颗粒等温、粒径单一和均匀弥散等条件,是应用FTIR
E-T技术所必须满足的.针对一个改进的傅立叶变换红外光谱仪,以酒精火焰和蜡烛火焰为测试对象,对该机的适用性和误差来源进行详细分析.结果表明,FTIR
E-T技术所确定的CO2温度和碳黑温度,与其它方法的测量结果符合得较好,可能的相对误差小于±3%. 相似文献
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Y. H. Xiang R. X. Guo H. B. Li Y. Wang 《Energy Sources, Part A: Recovery, Utilization, and Environmental Effects》2013,35(2):110-118
Abstract Combustion characteristics and kinetics of partial gasified coal char (PGC-char) were investigated in this article. Two-stage distributed activation energy model (TS-DAEM) and simple model were used to model the combustion kinetics. The experimental results showed that the combustion characteristics of PGC-chars varied with coal types and percentage of gasification. Modeling results showed that TS-DAEM could suitably describe the combustion of PGC-char. The activation energy and preexponential factor increased with the increasing of PGC-char gasification percentage, but the percent of high reactivity part decreased. This indicated that the difficulty reactive part in the partial gasified coal char became more and more with the gasification conversion. However, simple model wasn't fit to describe the combustion of PGC-char, especially for PGC-chars with obvious second peak in combustion DTG curves. 相似文献
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