This paper presents the carbon isotopic values of individual n alkanes in pyrolysates of algae, which are widely spread in marine and lacustrine environments. The carbon isotopic values of n alkanes originated from di...This paper presents the carbon isotopic values of individual n alkanes in pyrolysates of algae, which are widely spread in marine and lacustrine environments. The carbon isotopic values of n alkanes originated from different algal precursors vary greatly, and those of n alkanes originated from C. protothecoides, S. sp PCC 6803 and I. Galbana are even heavier than from higher plants. n alkanes with different carbon numbers derived from the same organism may stem from different biomacromolecules. The dominant product nC 31 diene yielded at 300℃ or lower temperature also is different from n alkanes yielded at the same thermal evolution phase with respect to their origin. The catalysis of mineral components in limestone may lead to a lighter carbon isotope composition of n alkanes.展开更多
基金This work was supported by grants from National Basic Research Program of China(2009CB918801)The National Natural Science Foundation of China(31171274)~~
文摘This paper presents the carbon isotopic values of individual n alkanes in pyrolysates of algae, which are widely spread in marine and lacustrine environments. The carbon isotopic values of n alkanes originated from different algal precursors vary greatly, and those of n alkanes originated from C. protothecoides, S. sp PCC 6803 and I. Galbana are even heavier than from higher plants. n alkanes with different carbon numbers derived from the same organism may stem from different biomacromolecules. The dominant product nC 31 diene yielded at 300℃ or lower temperature also is different from n alkanes yielded at the same thermal evolution phase with respect to their origin. The catalysis of mineral components in limestone may lead to a lighter carbon isotope composition of n alkanes.
