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工业分析是生物质热化学工程技术中的一项常规应用分析。文章探讨了近红外光谱技术(NIRS)在秸秆工业组成分析上的应用,并利用近红外光谱技术预测了秸秆中挥发分和固定碳含量。利用Foss6500光栅型近红外光谱仪在1108～2492nm光谱范围内分别对直接切短秸秆样品中水分、灰分、挥发分和固定碳以及干燥粉碎样品中灰分、挥发分和固定碳的近红外光谱建立了预测模型。对于直接切短秸秆样品,水分、灰分、挥发分和固定碳校正模型外部验证的R2V(SEP)分别为0.92(0.76%),0.94(0.84%),0.88(0.82%)和0.75(0.65%)。干燥粉碎样品中灰分、挥发分和固定碳的近红外光谱模型外部验证的R2V(SEP)分别为0.98(0.54%),0.95(0.57%)和0.78(0.61%)。实验结果表明,近红外光谱技术能实现秸秆的快速分析和多组分同时测定,从而可降低秸秆工业分析的成本。
Industrial analysis is a routine application analysis of biomass thermochemical engineering. In this paper, the application of near infrared spectroscopy (NIRS) in the analysis of industrial composition of straw was explored. The volatile and fixed carbon contents in straw were predicted by near infrared spectroscopy. The Foss6500 grating near-infrared spectrometer was used to predict the near infrared spectra of ash, volatile matter and fixed carbon in water, ash, volatile and fixed carbon, and dry and crushed samples of straw samples directly cut in the spectral range of 1108 ~ 2492nm model. R2V (SEP) for external verification of moisture, ash, volatiles and fixed carbon calibration models for direct crop short straw was 0.92 (0.76%), 0.94 (0.84%), 0.88 (0.82%) and 0.75 (0.65% . R2V (SEP) was 0.98 (0.54%), 0.95 (0.57%) and 0.78 (0.61%) externally verified by near infrared spectroscopy models for ash, volatiles and fixed carbon in the dry comminuted samples, respectively. The experimental results show that near-infrared spectroscopy can achieve rapid analysis of straw and simultaneous determination of multi-component, which can reduce the cost of straw industrial analysis.