Thermo-Analysis of Sedimentary Orgaric Matter under Non-Oxygen Condition
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摘要: 本文对选自柴达木、南海莺琼盆地１９个生物气源岩样品，进行了三个不同温度段的绝氧热解分析，初步证实了居首位可利用的有机物为纤维素、半纤维素等多糖类物质，类脂化合物热解温度为２６９—２７０℃，核酸类蛋白质类等的热分解温度大多数也在３２０℃以内。因而用３３０℃热分解１小时获取的热解失重值可用于评价气源岩的生化甲烷丰度。本文对生物成因天然气资源的预测有实际意义。Abstract: Non-oxygen thermo-analysis at three different temperatures was Performed for the 19 biogas source rock samples from Ying-Qiong Basin in South China Sea and Qaidam Basin in Qinghai Province. The results showed that the thermo-decomposing temperature was 260-270℃ for polysaccharides (such as cellululose, semi-cellose) and lipid compounds. Also, the thermo-decomposing temperature was lower than 320℃ for most of nucleic acids and proteins.Therefore, the thermo-decomposing value at 330℃ for 1 hr. could be used to estimate the production abundance of biochemical methane.
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