摘要
煤焦油是一种制备高附加值碳材料的理想原料,然而其深加工利用受到内部高含量喹啉不溶物(QI)的影响。为此,本文介绍了煤焦油的组成和性质,简述了煤焦油中QI的组成、来源和其对煤焦油加工利用的危害,综合对比分析了煤焦油净化分离常用的几种方法。热过滤法分离效率虽然满足工业需求,但工业成本较高;重力沉降法操作简单,但分离效率低;离心分离法分离效率高,但处理量小,难以满足工业化应用;蒸馏处理法分离效率高,但原料利用率低;溶剂萃取法容易操作,但溶剂需求量大;改质法效果明显,但成本较高;静电分离法能量消耗低,但静电分离最佳条件变动性较大;联合处理法分离效率较高,应用前景广阔,可以作为一种净化分离的科学有效方法,并可以作为一种净化分离技术的发展趋势。
Coal tar is a kind of ideal feedstock to produce high value-added carbon materials. However,its high content of quinoline insoluble（QI） limits its utilization seriously. Typical properties of coal tar are introduced first. The composition and origin of QI as well as their damages to the utilization of coal tar are described briefly. Then,methods commonly used to remove QI are reviewed and compared in detail in terms of efficiency and feasibility. The separation efficiency of hot filtering process could meet the industrial requirement,but its cost is too high. The gravity sedimentation process can be simply operated,whereas,it shows a low separation efficiency. For centrifugation and distillation,the separation efficiency is both high,but they are limited by their low handing capacity and low utilization ratio of feedstock,respectively. The operation of solvent extraction process is simple,but it consumes a great deal of solvent. The effect of modification process is obvious; however,its cost is high. The energy consumption of electrostatic separation method is low,however, the optimum condition is difficult to regulate and control. Combined process not only significantly removes QI,but also has excellent application prospect. The combined process is considered to be a scientifically feasible and effective method to remove QI in coal tar,and it can become a promising coal tar purification technology as a future research focus.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2015年第9期3262-3266,共5页
Chemical Industry and Engineering Progress
基金
煤气(煤焦油)净化处理新工艺及其应用性能研究项目(JRNQT1204-04)
中国石油天然气股份有限公司资助项目(PRIKY15009,PRIKY15002)
关键词
煤焦油
喹啉不溶物
分离
联合处理法
coal tar
quinoline insolubles
separation
combined process
