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盘星藻经过死亡过程的生化降解作用后,烷烃生物标志物组成发生了很大变化,主要表现在C_(17)正烷烃优势的进一步提高和更高碳数烯烃化合物的大量产生。热解前和200℃热解时,两种藻样品的烷烃含量均很低.300℃热模拟后,新鲜藻产烃量仍然很低;而死亡藻烷烃产量达到细胞干重的5.6％,是相同热解温度下新鲜藻烷烃产量的12倍。死亡过程对藻类热解烃的生物标志物组成也有重要影响,明显有利于低碳数正烷烃的大量产生,Pr/Ph,Pr/nC_(17),Ph/nC_(18)等正烷烃参数发生明显变化。研究结果表明死亡过程有利于低熟油的形成,死亡藻细胞中的非细菌降解对于藻类生烃具有重要的地球化学意义。
After the biodegradation of C. albicans, the biomarker composition of alkanes has changed greatly, which is mainly reflected in the further improvement of the advantages of C_ (17) n-alkanes and the mass production of higher carbon number olefins. Alkane content of both algae samples was very low before pyrolysis and at 200 ℃ pyrolysis, and the production of fresh algae was still very low after thermal simulation at 300 ℃, while the yield of dead alginate reached 5.6% of the dry weight of cells Twelve times the yield of fresh algaene at the same pyrolysis temperature. The death process also has a significant effect on the biomarker composition of algae pyrolysis hydrocarbons, which is obviously conducive to the large-scale production of low-carbon n-alkanes. The n-alkane parameters such as Pr / Ph, Pr / nC_ (17) and Ph / nC_ (18) obvious change. The results show that the death process is conducive to the formation of low-mature oil, non-bacterial degradation of dead algae cells for algal hydrocarbon generation has important geochemical significance.