中低温煤焦油沥青质的分析表征.pdf

石油学报(石油加工)
2016年4月
ACTA PETROLEI SINICA (PETROLEUM PROCESSING SECTION)
第32卷第2期
文章编号:1001-8719(2016)02-0000-09
中低温媟焦油沥青质的分析表征
朱永红,黄江流,淡勇,王磊,李稳宏,李冬
(西北大学化工学院,陕西西安710069)
摘要:采用XPS、XRD、FT-IR、3CNMR、元素分析等手段分析表征了中低温煤焦油正庚烷沥青质(CT-C2沥青
质),系统研究了CT-C沥青质表面元素的赋存状态、相对含量以及其晶体结构。结果表明,该沥青质的主要结构
为多环稠合芳香烃并富含杂原子,其芳香度(f)明显大于一般原油沥青质;烷基链间距和芳香片层直径值较小,其
芳环上烷基侧短而少且难以形成堆积结构;表面C主要以sp2和sか碳的形式存在,二者摩尔分数之和达
69.9%,以C=の和COO一基团存在的C较少。该沥青质表面的杂原子以O原子为主,N和S原子较少,其中含
氧官能团主要是酚羟基和醚氧基,摩尔分数达61.9%。含氮官能团主要以吡啶氮(N6)和吡咯氮(N-5)为主,二者
摩尔分数之和为80.5%;含硫官能团中,噻吩硫、烷基硫比较多,摩尔分数之和达51.7%。该C沥青质表面加氢
难度较大的N-6、N-5和噻吩硫的摩尔分数低于石油沥青质,这可能是煤焦油加氢工艺中N、S脱除效率较高的原
因之…
关键词:中低温煤焦油;正庚烷沥青质;XPS;结构;杂原子官能团
中图分类号:TE622.1文献标识码:Adoi:10.3969/j.issn.1001-8719.2016.02.000
Analysis and Characterization of Medium/Low Temperature Coal Tar Asphaltene
ZHU Yonghong, HUANG Jiangliu, DAN Yong, WANG Lei, LI Wenhong, II Dong
(School of Chemical Engineering, Northwest University, Xi'an 710069, China)
Abstract: The n-heptane asphaltene from medium/low temperature coal tar was analyzed and
characterized by XPS, XRD, FT-IR, C-NMR and elemental analysis, The occurrence state and
content of element, crystal structure of the CT-C, asphaltene were systematically discussed The
results showed that the main component of CT-C, asphaltene was polycyclic aromatic hydrocarbon
combined with heteroatoms, Its aromaticity (fa was obviously larger than that of crud
asphaltene. The diameter of aromatic sheet plus alkyl chains and the distance between interchain or
internaphthene layers were small, which resulted in the short aromatic ring alkyl side chain and
made it difficult to form a stacked structure. The sp carbon and spcarbon were the main forms of
carbon element with the total molar fraction of 69.9%. The heteroatoms on the surface of the
asphaltene were mainly oxygen atoms, while the nitrogen atoms and sulfur atoms were fewer. In
oxygen-containing groups, 61.9% molar fraction were phenolic hydroxyl and ether oxygen groups
In nitrogen-containing groups, 80.5% molar fraction were pyridine(n-6) and pyrrolic(n-5). In
sulfur-containing groups, 51. 7% molar fraction were alkyl sulphides and thiophene sulfur
ess
molar fractions of N-6, N-5 and thiophene sulfur of being difficultly hydrogenated on the surface of
收稿日期:2014-11-05
基金项目:国家自然科学基金青年科学基金项目(21206136)、高等学校博士学科点专项科研基金项目(20126101120013)、陕西省科技统筹创
新工程计划项目(2014KTCI.0109)、陕西省教育厅科学研究计划项目(15JF031,14JF026)和西北大学“优秀青年学术骨干支持计划”资助
第一作者:朱永红,男,硕土研究生,从事化工设备及工艺方面的研究;Email:13227168G163.com
通讯联系人:李冬,男,副教授,博士,从事化学工程与工艺方面的研究;E- mail: lidong@nwu,edu,cn