摘要
选择4种煤化程度不同的煤作为研究对象,以四氢呋喃(THF)为萃取剂对其进行索氏萃取。用正离子电喷雾电离(ESI)傅里叶变换离子回旋共振质谱(FT-ICR MS)对萃取液甲基硫盐进行表征。结果表明:煤萃取率与煤的挥发分成正比例关系,煤化程度越低,煤的挥发分越高,THF萃取率也越高。煤THF萃取物的分子量分布在200 Da^550 Da,从中鉴定出了S1、O1S1、O2S1、S2和N1S1等类别的含硫化合物,其中S1类含硫化合物占比较高,基本在50%左右。随着煤化程度的提高,THF萃取物中含硫化合物的种类减少。THF萃取物中的S1、O1S1核心结构均以噻吩类化合物为主,部分含有呋喃结构。
Selecting four different ranks of coal as the research objects,tetrahydrofuran(THF)was used as the extractant for Soxhlet extraction.The methylsulfonium salts of extraction liquid were characterized by positive-ion electrospray ionization(ESI)Fourier transform ion cyclotron resonance(FT-ICR)mass spectrometry(MS).The results showed that the extraction yield was in direct proportion to the volatile content of coal.The lower the degree of coalification,the higher the volatile content of coal,and the higher the extraction rate of THF.And the molecular weights of the sulfur compounds varied from 200 Da to 550 Da.Also,S1,O1S1,O2S1,S2 and N1S1 class compounds were identified in THF extract.Among them,the S1 class compounds were the predominant sulfur compounds,accounting for 50%of the total identified sulfur compounds.With the increase of coal rank,the types of sulfur compounds in THF extracts decreased,the core structures of S1 and O1S1 in extracts were mainly thiophene compounds,and some of them contained furan.
作者
刘敏
Liu Min(State Key Laboratory of Coal Mining and Clean Utilization,CCTEG China Coal Research Institute,Beijing 100013,China;China University of Mining and Technology-Beijing,Beijing 100083,China)
出处
《煤化工》
CAS
2020年第6期56-61,共6页
Coal Chemical Industry
基金
北京市自然科学基金(2182090)。
