Molecular structure evolution of Type I kerogen during pyrolysis: Case study from the Songliao Basin, NE China

干酪根 热解 碳氢化合物 地质学 碳纤维 油页岩 芳香烃 开裂 化学 矿物学 烃源岩 有机化学 材料科学 构造盆地 古生物学 复合数 复合材料
作者
Huairen Cao,Lei Yan,Xiaoyu Wang,Yan–Rong Zou,Ping’an Peng
出处
期刊:Marine and Petroleum Geology [Elsevier BV]
卷期号:134: 105338-105338 被引量:6
标识
DOI:10.1016/j.marpetgeo.2021.105338
摘要

To characterize molecular structure evolution of Type I kerogen, we performed gold tube pyrolysis experiments on a Cretaceous Qingshankou lacustrine mudstone in the Songliao Basin during artificial maturation. The hydrocarbons generated at 320–600 °C at two heating rates, 2 and 20 °C/h were quantified, and the maximum yields of C14+, C6-14 and C2-5 gaseous products corresponded to vitrinite reflectance (Ro) nodes of 1.18%, 1.76% and 2.5%, respectively. Chemical compositions of solid residues (pyrolysis products remaining after extraction by dichloromethane and methanol) with Easy%Ro values ranging from 0.49 to 2.5% were studied by elemental analysis and nuclear magnetic resonance. With increasing temperature, the solid residues presented sharp decreases in aliphatic fractions and significant increases in aromatic fractions, while a condensation reaction occurring in the residue was related to secondary coking and cracking reactions occurring after the peak oil window. Four structural models of the residues were investigated, demonstrating that three positive nonlinear stages occurred between fused aromatic carbon (XE BP) structures and hydrocarbon generation. At Easy%Ro < 0.89, the XE BP numbers were relatively stable, and the generated hydrocarbons mainly attributed to cleavage of heteroatomic functional groups (NSOs) of kerogen. During the peak hydrocarbon-generating stage (Easy%Ro values of 0.89–1.76), the XE BP numbers exhibited an obvious increase due to breaking of carbon chains and cyclization reactions, which was accompanied by formation of large quantities of C14+ oils and C6-14 hydrocarbons derived from direct cracking of kerogen. The XE BP numbers were growth slowing and highly cross-linked features at Easy%Ro values of 1.76–2.5% due to polycondensation, and a large amount of C2-5 gas generation was mainly attributed to oil cracking. A good coupling relationship between H/C atomic ratio and polycondensation of aromatic structures in evolution further strengthens research of molecular structure evolution in Type I kerogen. Moreover, comparison of the number of aromatic structures caused by alkyl bond breakage and condensation showed that the number of the former was higher than that of the latter before the peak of oil generation, whereas the number of the latter was obviously dominant after the peak of oil generation.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
1秒前
MQRR发布了新的文献求助10
1秒前
锦鲤完成签到 ,获得积分10
2秒前
4秒前
任性的乐天完成签到,获得积分10
5秒前
7秒前
Stanley发布了新的文献求助10
9秒前
李爱国应助虚心月饼采纳,获得10
9秒前
9秒前
10秒前
13771590815发布了新的文献求助10
12秒前
橙色小人完成签到,获得积分10
13秒前
15秒前
苗条梦玉发布了新的文献求助10
15秒前
luoshikun发布了新的文献求助10
17秒前
bkagyin应助MQRR采纳,获得30
17秒前
18秒前
西西完成签到,获得积分20
20秒前
Stanley完成签到,获得积分20
21秒前
今后应助苗条梦玉采纳,获得10
21秒前
量子星尘发布了新的文献求助10
21秒前
zzlark完成签到,获得积分10
22秒前
爱吃冬瓜发布了新的文献求助20
23秒前
Awalong完成签到,获得积分10
26秒前
27秒前
ymj完成签到,获得积分10
33秒前
35秒前
wulalala完成签到,获得积分20
35秒前
35秒前
36秒前
sssyq完成签到,获得积分20
37秒前
彭于晏应助luoshikun采纳,获得10
38秒前
领导范儿应助啦啦啦采纳,获得10
39秒前
katarinabluu完成签到,获得积分10
40秒前
彭于晏应助leanne采纳,获得10
40秒前
我是老大应助明道若昧采纳,获得10
40秒前
sssyq发布了新的文献求助10
40秒前
着急的觅海完成签到,获得积分10
40秒前
41秒前
ylky发布了新的文献求助10
46秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
‘Unruly’ Children: Historical Fieldnotes and Learning Morality in a Taiwan Village (New Departures in Anthropology) 400
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
基于可调谐半导体激光吸收光谱技术泄漏气体检测系统的研究 350
Robot-supported joining of reinforcement textiles with one-sided sewing heads 320
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3989378
求助须知:如何正确求助?哪些是违规求助? 3531442
关于积分的说明 11254002
捐赠科研通 3270126
什么是DOI,文献DOI怎么找? 1804887
邀请新用户注册赠送积分活动 882087
科研通“疑难数据库(出版商)”最低求助积分说明 809173