期刊
FUEL PROCESSING TECHNOLOGY
卷 230, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.fuproc.2022.107221
关键词
Coal; Biomass; Thermochemical conversion; Char structure evolution; In-situ characterization
资金
- National Natural Science Foundation of China [51876225, 51876093]
- National Key R&D Program of China [2018YFE0183600]
- State Key Laboratory of High efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University [2022-K39]
This review paper systematically describes in-situ structure characterization techniques and their applications in the conversion processes of coal/biomass. The in-situ analysis offers advantages of high accuracy and simplified sample preparation, and the challenges and prospects for in-situ analysis of char structure evolution are discussed.
Structure is the basis of the reaction. Compared with the ex-situ analysis of char structure evolution during thermochemical conversion of carbonaceous substance, in-situ analysis shows great advantages in reducing the inaccuracy of the results originated from sample cooling and pre-treatment as well as an effective way to avoid the multiple batches of experiments for the sample preparation. Thus, in-situ analysis is essential for an accurate and in-depth understanding of the reaction mechanism. In this review paper, in-situ structure characterization techniques, such as in-situ diffuse reflection Fourier transform infrared spectrometer (in-situ DRIFTS), in-situ Raman, in-situ synchrotron small-angle X-ray scattering (in-situ SAXS), heating stage-optical microscope com-bined system (HSOM), and visualization technology inside the gasifier as well as related analysis methods have been systematically described. Additionally, the recent research progress on in-situ analysis of char structure (chemical functional groups, carbon structure, pore structure, apparent structure, particle swarm evolution, etc.) evolution during the pyrolysis, gasification, or combustion of coal/biomass have been summarized in detail. Moreover, the challenges and prospects for in-situ analysis of char structure evolution have been outlined from technical and research levels based on this technical review.
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