Study of Mineral Reactions of Oil Shale under Different Environmental Conditions using In-situ Hot-stage XRD Analyses
Study of Mineral Reactions of Oil Shale under Different Environmental Conditions using In-situ Hot-stage XRD Analyses
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利用原位热台 XRD 分析研究不同环境条件下油页岩的矿物反应
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
S. Bhargava
中科院分区：
文献类型：
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作者：
N. Subasinghe;D. B. Akoiekar;S. Bhargava
在四种不同的环境（空气、N2、CO2和真空）下，使用原位高温XRD对澳大利亚的几种油页岩进行了分析。油页岩在加热过程中发生的反应类型取决于加热环境和加热速率等因素，相对于其他可能发生的反应，脱水和分解反应在真空环境中更为突出。然而，注意到氧化反应，如黄铁矿到磁黄铁矿的转变，在真空和氮气中并没有完全抑制，尽管反应的程度相对较小。在氧化条件下，黄铁矿转化为氧化铁，在与干酪根转化为油相同的温度范围内释放SOI。虽然二氧化碳部分阻碍了方解石等碳酸盐矿物的分解，但对CaSO4的形成没有明显影响。因此，在CO2环境下，CaO仍然可以吸附有环境问题的SO2气体。
Several Australian oil shales were analysed using in-situ high-temperature XRD in four different environments (air, N2, CO2, and vacuum). The types of reactions that occur during heating of the oil shale depend on factors such as the heating environment and the heating rate, Dehydration and decomposition reactions are more prominent in a vacuum environment, compared to the possible other reactions. However, it was noted that oxidation reactions such as pyrite to pyrrhotite transformation, are not totally suppressed in vacuum and nitrogen, although the extent of the reactions is comparatively small. Under oxidation conditions, pyrite is converted to iron oxides, emitting SOI in the same temperature range as kerogen is converted to oil. Although carbon dioxide partially impedes the decomposition of carbonate minerals such as calcite, formation of CaSO4 is not significantly afected. Therefore, adsorption of environmentally problematic SO2 gas by CaO can still be achieved in CO2 environments.