Determination of chemical properties of pyrolysis products from coals by diffuse-reflectance infrared spectroscopy and partial least squares

被引：11

作者：

Alciaturi, CE

Escobar, ME

de La Cruz, C

Vallejo, R

机构：

[1] INZIT, CICASI, Maracaibo, Venezuela

[2] Univ Zulia, Fac Ciencias Expt, Dept Quim, Lab Espectroscopia Mol & Atom, Maracaibo 4011, Venezuela

来源：

ANALYTICA CHIMICA ACTA | 2001年 / 436卷 / 02期

关键词：

coal; pyrolysis; DRIFT; PLS; IPW; SOPA;

D O I：

10.1016/S0003-2670(01)00947-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Typical coal samples from Venezuela were pyrolysed in nitrogen atmosphere at temperatures between 150 and 900 degreesC. Structural changes were monitored by diffuse-reflectance infrared Fourier transform spectroscopy, i.e. DRIFTS. Segmented osculating polynomial approximation (SOPA) and numerical differentiation by the Savitzky-Golay procedure were used as spectroscopic data pre-treatment. The data was then correlated by partial least squares (PLS) and iterative predictor weighting (IPW) with volatile matter, hydrogen, carbon, nitrogen, and total sulphur contents. The method was found to be useful for the prediction of volatile matter and hydrogen contents, but not to the other physical and chemical properties of the pyrolysed products. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：265 / 272

页数：8