摘要
煤焦油中酚类物质的有效分离,可实现其高附加值利用。针对酚类物质的分离,本研究采用聚乙烯吡咯烷酮(PVP)为吸附剂,研究了其对模型油中邻甲酚、间甲酚、对甲酚、1-萘酚和2-萘酚等的吸附性能。研究发现,PVP对酚类物质具有较大的吸附容量,其中对间甲酚、对甲酚、1-萘酚和2-萘酚的最大吸附量均可达1000 mg/g以上。同时发现,PVP上的Lewis碱性位点(C=O和C-N)可与酚羟基之间形成氢键作用,该作用的强度受酚类物质空间位阻影响。PVP具有一定的吸附选择性,在苯并呋喃或喹啉存在下,依然能够有效吸附2-萘酚。此外,使用过的PVP可再生并重复利用,同时实现酚的回收。可见,PVP是一种可用于分离煤焦油中酚类物质的优良吸附剂。
Effective separation of phenols in coal tar is essential for enhancing its application value.In this work,polyvinylpyrrolidone(PVP)was used as a sorbent in the separation of phenols in model oils;the adsorption performance of PVP towards o-cresol,m-cresol,p-cresol,1-naphthol,and 2-naphthol was then comparatively investigated.The results indicate that PVP possesses high adsorption capacity towards the phenols;the maximum adsorbance of PVP towards m-cresol,p-cresol,1-naphthol,and 2-naphthol is higher than 1000 mg/g.For the adsorption of phenols on PVP,H-bonds are formed between the Lewis basic sites(C=O and N)of PVP and the phenolic-OH group and the H-bonding intensity is influenced by the steric hindrance of phenols.Furthermore,PVP shows high adsorption selectivity;2-naphthol can be adsorbed effectively on PVP even in the presence of benzofuran or quinoline.Moreover,PVP can be regenerated for recycling where phenols are recovered as well.As a result,PVP is a promising sorbent for the separation of phenols from the coal tar oil.
作者
张可琢
余雅黔
唐瑞
郑宇琦
高家俊
姜兴茂
ZHANG Ke-zhuo;YU Ya-qian;TANG Rui;ZHENG Yu-qi;GAO Jia-jun;JIANG Xing-mao(Hubei Provincial Research Centre of Engineering&Technology for New Energy Materials,Hubei Key Lab of Novel Reactor&Green Chemical Technology,Key Laboratory for Green Chemical Process of Ministry of Education,School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430205,China)
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2019年第11期1305-1312,I0002,共9页
Journal of Fuel Chemistry and Technology
基金
湖北省教育厅科学技术研究项目(Q20181504)
武汉工程大学科学研究基金(17QD62)资助~~
