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秸稈和煤混燃物中秸稈含量近紅外光譜測(cè)定
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公益性行業(yè)（農(nóng)業(yè)）科研專(zhuān)項(xiàng)經(jīng)費(fèi)資助項(xiàng)目（201003063）


Quantitative Analysis of Straw Content in Co-firing Biomass-coal Blends by Near Infrared Spectroscopy
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    摘要:

    實(shí)現(xiàn)秸稈和煤混燃物中秸稈含量快速檢測(cè)對(duì)制定生物質(zhì)混燃發(fā)電補(bǔ)貼方法具有重要意義。收集我國(guó)不同地區(qū)、不同品種秸稈樣品81個(gè)，煤樣品9個(gè)，樣品粉碎后，按不同秸稈質(zhì)量分?jǐn)?shù)（1%～30%）制備樣品90個(gè)，其中60個(gè)為校正集，30個(gè)為獨(dú)立驗(yàn)證集。用傅里葉變換近紅外光譜儀進(jìn)行光譜掃描，分別采用間隔偏最小二乘法（iPLS）和遺傳算法（GA）進(jìn)行波長(zhǎng)選擇，用偏最小二乘法（PLS）建立定量分析模型。研究結(jié)果表明，采用GA-PLS方法，最優(yōu)模型建模數(shù)據(jù)點(diǎn)從3001個(gè)減少到33個(gè)，獨(dú)立驗(yàn)證集決定系數(shù)為0.89，預(yù)測(cè)標(biāo)準(zhǔn)差為2.87%，相對(duì)分析誤差為3.06。近紅外光譜技術(shù)結(jié)合GA-PLS建模用于快速檢測(cè)秸稈和煤混燃物中秸稈含量具有可行性。

    Abstract:

    It is important to realize rapid detection of straw content in co-firing biomass-coal blends for drawing up reasonable precept about biomass co-firing power generation subsidy. The original samples were consisted of 81 straws and 9 coals collected from different regions and different varieties in China. 90 blends samples of coal and straw (1%～30%) were prepared after comminution and separated into a calibration set (60 samples) and an independent validation set (30 samples). Spectra were scanned by FT-NIR spectrometer. The interval partial least squares (iPLS) and the genetic algorithm (GA) were used for wavelength selection. Quantitative analysis models for straw content were established by partial least squares (PLS). The results showed that data points for modelling decreased from 3001 to 33, determination coefficient, standard deviation of prediction (SEP) and ratio of performance to standard deviation (RPD) in validation were 0.89, 2.87% and 3.06 by GA-PLS method, respectively. It is concluded that NIRS with GA-PLS was feasible for fast quantitative analysis of the straw content in co-firing biomass-coal blends. 

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賀城,楊增玲,黃光群,廖娜,韓魯佳.秸稈和煤混燃物中秸稈含量近紅外光譜測(cè)定[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2011,42(10):125-128,104. He Cheng, Yang Zengling, Huang Guangqun, Liao Na, Han Lujia. Quantitative Analysis of Straw Content in Co-firing Biomass-coal Blends by Near Infrared Spectroscopy[J]. Transactions of the Chinese Society for Agricultural Machinery,2011,42(10):125-128,104.

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