DRIFT and TK/TPD Analyses of Surface Oxygen Complexes Formed during Carbon Gasification
DRIFT and TK/TPD Analyses of Surface Oxygen Complexes Formed during Carbon Gasification
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DOI：
10.1021/ef00045a028
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发表时间：
1994-05
期刊：
影响因子：
5.3
通讯作者：
Qianlin Zhuang;T. Kyotani;A. Tomita
中科院分区：
文献类型：
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作者：
Qianlin Zhuang;T. Kyotani;A. Tomita
采用漫反射红外傅里叶变换(DRIFT)光谱、瞬时动力学(TK)和程序升温脱附(TPD)相结合的方法研究了碳与氧气气化过程中生成的表面氧化合物。结果表明，在气化过程中，碳表面形成了内酯(和/或酸酐)、羰基和醚型络合物。在TK实验中解吸的络合物没有被检测到漂移。然而，通过这些联合技术成功地鉴定了TPD中负责CO2和CO释放的络合物：在900K左右，CO2的脱附来自内酯和/或酸酐的分解，而CO的脱附主要来自于羰基和醚型络合物
Surface oxygen complexes formed during carbon gasification with oxygen were studied by combining diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy with transient kinetic (TK) and temperature programmed desorption (TPD) techniques. It was found that lactone (and/or acid anhydride), carbonyl, and ether type complexes are formed on the carbon surface during gasification. The complexes which desorbed during the TK experiment were not detected with DRIFT. However, the complexes which are responsible for the CO 2 and CO evolution in TPD were successfully identified with these combined techniques: CO 2 desorption at around 900 K originates from the decomposition of lactone and/or acid anhydride, whereas CO desorption is mainly from carbonyl and ether type complexes