文献类型：期刊文献

英文题名：In Situ Raman Spectroscopy Study on Catalytic Pyrolysis of a Bituminous Coal

作者：Zhu, Huaili[1];Yu, Guangsuo[1];Guo, Qinghua[1];Wang, Xingjun[1]

机构：[1]East China Univ Sci & Technol, Key Lab Coal Gasificat & Energy Chem Engn, Minist Educ, Shanghai 200237, Peoples R China

年份：2017

卷号：31

期号：6

起止页码：5817

外文期刊名：ENERGY & FUELS

收录：;EI(收录号：20172803902377);WOS:【SCI-EXPANDED(收录号:WOS:000404691900007)】；

基金：This work is partially supported by National Nature Science Foundation of China (Grant 21176078).

语种：英文

外文关键词：Chemical reactors - Temperature - Bituminous coal - Raman spectroscopy - Pyrolysis - Thermogravimetric analysis - Full width at half maximum

摘要：How different catalysts would affect the evolution of char structure with increasing temperature during the pyrolysis of coal is fundamentally important for the clean utilization of coal. In this Study,,we applied in situ Raman spectroscopy and a fixed-bed reactor to characterize the evolution of char structure and product gas formation behavior. The results showed that the formation curves of the main gases presented two stages and the catalyst enhanced the pyrolysis significantly. The Raman spectra were fitted with a combination of four Lorentzian bands, (D1, D2, D4, one Gaussian band (D3) in the first-order region. Spectral parameters, such as hand position, full widths at half-maximum (FWPIM), and hand area ratio, were used to characterize char structure. The DI and G band FWHM and band area ratios ID1/I-G,ID3/I-G, and ID4/1(G) increased with increasing temperature, while the DI and G band positions and I-G/IA(ll) decreased, indicating, a decrease in the ordering of the char structure. The. addition of catalyst led to a lower degree of char structural order. Thermogravimetric analysis was also used to measure the reactivity of char derived from pyrolysis, and the results showed a good,correlation between reactivity Indexes and I-G/IA(II).