衰减全反射-显微傅立叶变换红外光谱原位分析煤有机显微组分.pdf

第34卷第6期
石实验地质
2012年11月
PETROLEUM GEOLOGY EXPERIMENT
Nov.,2012
文章编号:1001-6112(2012)06-0664-07
衰减全反射一显微傅立叶变换
红外光谱原位分析媟有机显微组分
余晓露12,白帆3,李志明2
(1.中国石油化工股份有限公司石油勘探开发硏究院无锡石油地质硏究所,江苏无锡214126;2.中国石油化工
股份有限公司油气成藏重点实验室,江苏无锡214126;3.中国石油大学(北京)地球科学学院,北京102249)
摘要:不同显微组分的傅立叶变换红外光谱谱带位置的定性分析和谱带强度的定量分析,可揭示其化学组成、结构特点和生烃能
力。利用衰减全反射一显微傅立叶变换红外光谱分析技术,对我国华北石炭系3个不同成熟度煤的有机显微组分进行原位分
析,避免了传统手段采用单组分分离富集过程中物理分选和化学试剂对显微组分造成的影响。煤有机显微组分红外光谱原位分
析结果表明:由壳质组、镜质组到惰质组,其脂肪烃含量和含氧基团呈减少趋势,芳香烃含量和芳构化程度呈增加趋势,反映生油
潜力逐渐减小。壳质组脂族结构以长链脂肪烃为主,有利于生油;镜质组和惰质组以短链为主,有利于生气。売质组中孢子体的
芳香烃含量相对较高,生烃潜力较差,树皮体、角质体和树脂体的生烃潜力较好。同一种有机显微组分随演化程度的增高,脂肪
族含量降低,芳香烃含量升高
关键词:有机显微组分;衰减全反射(ATR);显微傅立叶变换红外光谱;煤
中图分类号:TE122.1'13
文献标识码:A
Application of attenuated total reflectance-micro-fourier transform
infrared(atr-ittr )spectroscopy to in situ study of coal macerals
Yu Xiaolu", Bai Fan, Ii Zhiming
(1. Wuxi Institute ofpeolewm Geolog, SOPEC, Wu, Jiangsu 214126, China; 2. SINOPEC Key Laboratory of Petroleum
Accumlation Mechanisms, xi, dia su 21412, hn 3. ege of e s, Ci Lesiy f deum, Beijing 102249
Abstract Qualitative analysis of band position and quantitative analysis of band strength can provide evidence
for the study of chemical composition, structural features and hydrocarbon generation ability of various macerals
In situ attenuated total reflectance-micro-fourier transform infrared(atr-ftir) spectrometry, which could
avoid problems caused by physical separation and chemical reagent in traditional single component separation and
enrichment process, has been used to characterize coal macerals of three different maturity coal samples from
North China Carboniferous system. The results show that: aliphatic and oxygen-containing functional groups d
crease but aromatic functional group and aromatization increase from liptinite, vitrinite to inertinite. Aliphatic
structure of liptinite is mainly long-chain aliphatic hydroearbon which is good for oil generation but vitrinite and
inertinite is mainly short-chain hydrocarbon which is good for gas generation. For liptinite, the aromatic content
of sporophyte is relatively higher which results in poor hydrocarbon generation potential whereas resinite, peri
linite and cutinite have relatively better hydrocarbon generation potential. For the same type of maceral, aliphatic
functional group decreases but aromatic functional group increases with evolution stages
Key words: macerals; attenuated total reflectance; micro-fourier transform infrared; coal
不同的有机物质受到频率连续变化的红外光系统和傅立叶变换红外光谱仪2部分组成,利用红
照射时,由于分子对电磁辐射的选择性吸收,在
外显微系统可以选取某一微区内的有机组分,并通
定波长内具有特征吸收峰,这就是利用红外光谱研过傅立叶变换红外光谱仪对其进行检测处理,便可
究鉴别物质化学组成及结构的基本原理。鼠微得到能够反映其化学组成和结构特征的图谱。
傅立叶变换红外光谱仪( Micro-FTHR)由红外显徴
煤中不同的有机组分具有不同的化学组成和
收稿日期:2012-04-24:修订日期:2012-09-17
作者简介:余晓露(1983-),女,硕士,工程师,从事岩石矿物分析及红外光谱在石油地质中的应用研究。E-mail:xiaolu163@163.com。
基金项目:中国石化科技部项目(P11060)资助。