Improvement of octane number in FCC gasoline through the extraction with urea/thiourea complex based on property analysis  

作　　者：Lin Gao Chunyu Geng Botao Teng Hongwei Xiang Xiaodong Wen Yong Yang Yongwang Li 

机构地区：[1]State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,P.R.China [2]University of Chinese Academy of Sciences,Beijing 100049,P.R.China [3]National Energy R&D Center for Coal to Liquid Fuels,Synfuels China Technology Co.,Ltd.,Beijing 101407,P.R.China [4]Tianjin Key Laboratory of Brine Chemical Engineering and Resource Ecoutilization,College of Chemical Engineering and Materials Science,Tianjin University of Science and Technology,Tianjin 300457,China [5]Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,Zhejiang Normal University,Jinhua,321004,China

出　　处：《Industrial Chemistry & Materials》2024年第4期613-621,共9页工业化学与材料（英文）

基　　金：The authors gratefully acknowledge the financial support from the key special project of“Inner Mongolia Revitalization Action with Science and Technology”(No.2021EEDSCXSFQZD004);from the Clean Combustion and Low-carbon Utilization of Coal Strategic Priority Research Program of the Chinese Academy of Sciences(Grant No.XDA 29000000)。

摘　　要：In the research described in this paper,the uses of the urea/thiourea complexation approach were employed to enhance the octane number of FCC gasoline by extracting n-alkanes.It was observed that adding thiourea improved the removal of the n-alkanes from gasoline,and matching results were obtained from experiments using model samples.Molecular dynamics simulation revealed that the stability of urea complexes increased as the carbon number of the n-alkanes was raised,whereas lighter n-alkane molecules exhibited a lower propensity for complex formation with urea.This finding is in agreement with the results of the DSC measurement at the decomposition temperature.Furthermore,infrared spectrum analysis,XRD characterization,and reaction heat measurements indicated that although thiourea was introduced into the reaction system,it did not actively participate in the complexation reaction.In summary,the introduction of thiourea resulted in an increased solubility of urea in an ethanol solution and enhanced the reaction heat,suggesting its beneficial role in promoting urea complex formation and facilitating n-alkane removal from FCC gasoline.

关 键 词：UREA THIOUREA FCC gasoline THERMOANALYSIS Molecular dynamics 

分 类 号：O62[理学—有机化学]