中温煤焦油中Fe和Ca分布规律的研究.pdf

石油化工.
1028
PETROCHEMICAL TECHNOLOGY
2017年第46卷第8期
D?l:10.3969/jisn.1000-8144.2017.08.012
中温媟焦油中Fe和Ca分布规律的研究
逯承承,李冬,王磊,杨若凡,李稳宏
(西北大学化工学院,陕西西安710069)
[摘要.以陕北某焦化厂的中温煤焦油为原料,对煤焦油中金属Fe和Ca的分布形态进行∫研究,采用柱层析法和溶剂抽提
法对煤焦油进行组分分离,通过酸萃取对煤焦油沥青质中的金属Fe和Ca进行转移,对得到的沥青质进行元素分析、凝胶渗
透色谱分析、'HNMR、FTIR等分析表征。实验结果表明,溶剂抽提法优于柱层析法,采用溶剂抽提法对煤焦油进行分离得
到的沥青质芳香度较馬,煤焦油中含有21.06%(w)的浙青质,沥青质中的金属Fe和Ca含量(w)高达67.19%和63.70%。
表征结果表明,金属Fe和Ca多以羧酸盐和酚盐的形式存在,Fe和Ca还可能与N,O,S等杂原子配位结合;沥青质分子间
杂原子间存在的x-x相互作用使金属结合更牢固
关键词]中温煤焦油;沥青质:Fe和Ca分布形态
L文重编号」1000-8144(2017)08-1028-06
中图分类号]TQ524
[文献标志码]A
Study on the distribution of Fe and Ca in medium temperature coal tar
Lu Chengcheng, Li Dong, Wang Lei, Yang Ruofan, Li Wenhong
School of Chemical Engineering, Northwest University, Xi an Shaanxi 710069, China
I Abstract] The distribution of Fe and Ca in coal tar was studied by using medium temperature
coal tar as the raw material. The coal tar was separated by column chromatography and solvent
extraction. The metal Fe and Ca in coal tar asphaltene were transferred. The asphaltene was
analyzed by elemental analysis, gas chromatography, gel permeation chromatography, H
NMR. and FTIR. The results show that the method of solvent extraction is better than column
chromatography. Using solvent extraction to separate coal tar, the aromaticity of is bigher, and
asphaltene content in coal tar is 27. 06%(w). However, the 67.19%(w)and 6370%(w) of metal Fe
and Ca contents in coal tar are included. The characterization indicates that the metal Fe and Ca exist
in the form of carboxylate and phenolate, and may be combined with other atomic coordination o
N, O, S. The -m interaction between asphaltene molecules and miscellaneous makes the metal
bond stronger.
L Keywords medium low temperature coal tar; asphaltene; distribution pattern of Fe and Ca
煤焦油是煤通过干馏热解得到的产物,与原因此,为脱除金属Fe和Ca,需要研究金属Fe和
油性质、组成类似。由于媒焦油中含有少量金属,Ca的分布形态。国内外研究较多的是原油金属分布,
对后续加氢催化生产汽油、柴油产生不利影响,造且主要是i和V的研究。邹滢等研究减压渣油
成催化剂失活、中毒,管路堵塞,影响换热设备和中铁的赋存与分布形态,邓文安等?研究克拉玛依
加热炉的传热效果,严重时造成炉管被裂,Fe、Ca减渣中钙化合物的分布以及存在形态,而对于煤焦
还会加重常减压蒸馏装置与冷凝系统的腐蚀2。油中金属Fe和Ca的分布及存在形态研究较少,因
收稿日期]2017-01-25;L修改稿日期]2017-04-20
[作者简介」還承承(1994-),女,山东省菏泽市人,硕士生,电话13609196937,电邮1370087294@qg.com。联系人:李冬,电话
18681859699,电邮lidong@nwu.edu.cn
基金项目了国家自然科学基金项日(21646009);陕西省科技统等创新工程计划项目(2014 KTCLOI-09);陕西省教育厅产业化培育项
目(14.F026、151F031);映西省青年科技新星项目(2016KJXX-32)
万方数括