爱沙尼亚油页岩及其热解产物的电子顺磁共振研究

石剑; 李术元; 马跃

爱沙尼亚油页岩及其热解产物的电子顺磁共振研究

中国石油大学(北京), 北京 102249

基金项目:

国家重点基础研究发展规划 973 Program, 2014CB744302

"泰山学者"建设工程专项 ts20120518

中国石油大学（北京）科研启动基金 2462015YJRC002

详细信息

中图分类号: P618.12
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- 被引次数: 0
出版历程
- 收稿日期: 2017-07-09
- 修回日期: 2017-10-04
- 网络出版日期: 2021-01-23
- 刊出日期: 2018-01-10

Electron paramagnetic resonance (EPR) properties of Estonia oil shale and its pyrolysates

College of Science, China University of Petroleum(Beijing), Beijing 102249, China

Funds:

The project was supported by the National Basic Research Program of China 973 Program, 2014CB744302

"Taishan Scholar" Special Construction Project ts20120518

the Scientific Research Foundation of China University of Petroleum 2462015YJRC002

More Information

Corresponding author: LI Shu-yuan, E-mail: syli@cup.edu.cn

摘要

摘要: 采用电子顺磁共振（EPR）技术，系统地研究了热解温度对样品自由基浓度、g因子和线宽的影响。结果表明，油页岩干酪根及其制备的热解产物沥青、焦油和半焦的自由基浓度为2.29×10¹⁴-9.16×10¹⁴。当热解温度低于380℃时，主要发生干酪根的热解聚，当热解温度超过380℃，主要为中间产物热沥青的分解阶段，表现为热沥青的自由基浓度N_g和g因子值高于半焦。对EPR谱图线宽分析可知，当温度高于380℃时，焦油的线宽明显大于半焦和热沥青，说明液体内部自由基中自旋粒子间以及自旋粒子与环境的相互作用要比固体剧烈的多。温度低于380℃时，半焦和热沥青由于热解反应的进行，自由基自旋粒子之间及其与环境的相互作用增强，线宽随着温度的升高而增加。温度高于380℃时，半焦和热沥青的EPR曲线线宽降低，表明随着温度的升高自由基自旋粒子的相互作用减弱。
- 油页岩 /
- 热解 /
- 自由基 /
- 热沥青
Abstract: In order to describe pyrolysis characterization of Estonia oil shale kerogen, electron paramagnetic resonance (EPR) was carried out to analyze influence of pyrolysis temperature on free radical concentration, g factors and line width (△H) of Estonia kerogen and its pyrolysates. The results show that range of free radical concentration of Estonia oil shale and its pyrolysis oil, thermal bitumen and semi-coke is between 2.29×10¹⁴ and 9.16×10¹⁴. The free radical concentration and g factor of thermal bitumen is higher than that of semi-coke. The thermal depolymerization of kerogen mainly occurs before 380℃ and intermediate thermal bitumen mainly decomposes above 380℃. The line width of the samples shows that △H of shale oil is much higher than that of semi-coke and thermal bitumen at higher pyrolysis temperature. It means that the interaction between spin particles in free radicals and the interaction between the spin particles and environment in liquids are much more severe than solid samples. Below 380℃, △H of thermal bitumen and semi-coke increases with rising temperature. The interaction between the spin particles and environment was enhanced with pyrolysis proceeding. Above 380℃, △H of thermal bitumen and semi-coke decrease, indicating that the interaction between the spin particles is weaken with the rising temperature.
- oil shale /
- pyrolysis /
- radical /
- thermal bitumen

HTML全文

图 1 爱沙尼亚油页岩热解产物收率

Figure 1 Pyrolysates yields of Estonia oil shale pyrolysis process

■: shale oil; ▲: semicoke; ▼: thermal bitumen

下载: 全尺寸图片幻灯片

图 2 标准样品的EPR测试曲线

Figure 2 EPR test curve of standard sample

a: 2 μL; b: 5 μL; c: 8 μL; d: 11 μL

下载: 全尺寸图片幻灯片

图 3 DPPH标准曲线

Figure 3 Standard curve of DPPH

下载: 全尺寸图片幻灯片

图 4 干酪根及不同温度下半焦的EPR曲线

Figure 4 EPR curves of kerogen and semicoke at different temperatures

a: kerogen; b: 320 ℃; c: 360 ℃; d: 400 ℃; e: 440 ℃; f: 480 ℃

下载: 全尺寸图片幻灯片

图 5 不同温度下热沥青的EPR曲线

Figure 5 EPR curves of thermal bitumen at different temperatures

a: 320 ℃; b: 360 ℃; c: 380 ℃; d: 400 ℃; e: 420 ℃

下载: 全尺寸图片幻灯片

图 6 不同温度下焦油的EPR曲线

Figure 6 EPR curves of shale oil at different temperatures

a: 360 ℃; b: 380 ℃; c: 400 ℃; d: 420 ℃; e: 460 ℃

下载: 全尺寸图片幻灯片

图 7 自由基浓度随温度的变化

Figure 7 Effect of temperature on the free radical concentration

□: seimicoke; ○: shale oil; ▲: thermal bitumen; ◆: kerogen

下载: 全尺寸图片幻灯片

图 8 g值随温度的变化

Figure 8 Effect of temperature on the g factors

□: seimicoke; ○: shale oil; ▲: thermal bitumen; ◆: kerogen

下载: 全尺寸图片幻灯片

图 9 不同产物线宽随温度的变化

Figure 9 Effect of temperature on the linewidths

□: seimicoke; ○: shale oil; ▲: thermal bitumen; ◆: kerogen

下载: 全尺寸图片幻灯片

表 1 爱沙尼亚油页岩的工业分析、元素分析及铝甑分析

Table 1 Proximate, ultimate and Fischer assay analyses of Estonian oil shale

Proximate analysis w_d/%				Ultimate analysis w_d/%					Fischer assay w/%
M	V	A	FC	C	H	O	N	S	oil	water	semi-coke	gas
1.76	53.83	38.82	5.59	42.13	4.72	17.72	2.17	0.32	26.42	4.77	60.24	8.57
d: dry basis; M: moisture; V: volatile matter; A: ash; FC: fixed carbon

下载: 导出CSV

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