微藻和海洋真菌的抗性生物聚合物组成、结构及生烃潜力  

Composition,structure and hydrocarbon generation potential of resistant biopolymers from microalgae and marine fungus

作　　者：黄宁 孔祥兰 杨余[1,2] 冉勇 HUANG Ning;KONG Xianglan;YANG Yu;RAN Yong(State Key Laboratory of Advanced Environmental Technology,Guangzhou institute of geochemistry,Chinese Academy of Sciences,Guangzhou 510640,Guangdong,China;CAS Center for Excellence in Deep Earth Science,Guangzhou 510640,Guangdong,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院广州地球化学研究所,先进环境装备与污染防治技术全国重点实验室,广东广州510640 [2]中国科学院深地科学卓越创新中心,广东广州510640 [3]中国科学院大学,北京100049

出　　处：《地球化学》2025年第2期200-212,共13页Geochimica

基　　金：国家自然科学基金项目(42177399)资助。

摘　　要：选取1种海洋真菌(裂殖壶菌)和4种微藻(微拟球藻、小球藻、螺旋藻、海藻),对它们进行有机质分级,得到原始(BL)级分、去类脂(LPF)级分和非水解性有机质(NHOM)级分。采用元素分析、Rock-Eval热解技术和固态13C NMR技术对不同级分的元素组成、热解特征以及化学结构进行表征,并对5种样品的NHOM级分进行封闭条件下生烃热模拟实验。结果表明:①裂殖壶菌、微拟球藻、小球藻、螺旋藻和海藻的NHOM级分的最大生烃转化率分别为35.2%、75.2%、83.1%、74.4%和23.1%;②NHOM级分是具有高度脂肪性且在结构上与藻质素相似的抗性生物聚合物;③产油率、油潜力碳和轻指数(HI)显著相关,表明利用固态^(13)C NMR技术可有效评估这种抗性生物聚合物的生烃潜力;④NHOM级分的油气潜力碳含量是决定NHOM级分生烃潜力的重要因素。本研究为评估类藻质素的抗性生物聚合物的生烃潜力提供了实验和理论依据。In this study,one fungus(Schizochytrium sp.)and four microalgae(Nannochloropsis sp.,Chlorella,Spirulina and Kelp)were first fractionated into three fractions:the bulk fraction(BL),the lipid-free fraction(LPF),and the non-hydrolyzable organic matter fraction(NHOM).Then elemental analysis,Rock-Eval and 13C cross-polarization/total sideband suppression(CP/TOSS)nuclear magnetic resonance(NMR)were conducted to characterize the elemental compositions,pyrolysis characteristics,and chemical structures of the three fractions,and thermal simulation experiments of hydrocarbon generation under closed conditions were conducted on the NHOM fractions of the five samples.The results showed that(1)the maximum hydrocarbon generation conversion rates of the NHOM of Schizochytrium sp.,Nannochloropsis sp.,Chlorella,Spirulina,and Kelp fractions were 35.2%,75.2%,83.1%,74.4%,and 23.1%,respectively;(2)all the NHOM fractions were highly resistant aliphatic biopolymers and similar to algaenan in structure;(3)significant correlations among oil-prone carbon,hydrogen index(HI),and oil yield were observed,indicating that using solid-state ^(13)C NMR technique to assess the hydrocarbon generation potential of the NHOM fraction is effective;(4)the oil-and gas-prone carbon of NHOM was the key factor determining the hydrocarbon generation potential.This study provides experimental and theoretical bases for assessing the hydrocarbon generation potential of algal-like resistant biopolymers.

关 键 词：热模拟实验 油气潜力碳 藻质素 生烃潜力 固态^(13)C NMR 

分 类 号：P593[天文地球—地球化学]