低温煤焦油沥青组分组成与结构分析  

Composition and structure analysis of the components from low-temperaturecoal tar pitch

作　　者：吴玉起 钟梅[1,2,3] 亚力昆江·吐尔逊[1,2,3] WU Yuqi;ZHONG Mei;YALKUNJAN Tursun(College of Chemical and Engineering,Xinjiang University,Urumqi 830046,China;State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources,Xinjiang University,Urumqi 830046,China;Key Laboratory of Coal Clean Conversion&ChemicalEngineering,Urumqi 830046,China)

机构地区：[1]新疆大学化工学院,新疆乌鲁木齐830046 [2]新疆大学省部共建碳基能源资源化学与利用国家重点实验室,新疆乌鲁木齐830046 [3]新疆大学新疆煤炭清洁转化与化工过程重点实验室,新疆乌鲁木齐830046

出　　处：《洁净煤技术》2023年第7期209-217,共9页Clean Coal Technology

基　　金：新疆维吾尔自治区重大科技专项资助项目(2021A01002-3);国家自然科学基金资助项目(21766035);新疆维吾尔自治区杰出青年基金资助项目(2020Q001);上海合作组织科技伙伴计划及国际科技合作计划资助项目(2020E01018)。

摘　　要：以低温煤焦油沥青为原料,依据四组分分析法,将其分为饱和分(Sa)、芳香分(Ar)、胶质(Re)和沥青质(As)。基于X射线光电子能谱(XPS)、核磁共振(NMR)、傅立叶变换红外吸收光谱(FT-IR)、元素分析(EA)、相对分子质量(GPC)及紫外(UV)等分析结果,采用改进的Brown-Ladner法计算各组分的结构参数。结果表明:就分子量而言,As(5008)>Re(1042)>Sa(771)>Ar(602);Sa、Ar、Re和As中C=O的相对含量依次增加,C-O含量变化趋势与之相反,其中Sa以C—OH为主,As则富含C=O;Sa中的N全部以氨-N形式存在,Ar和As的含氮基团则以吡啶-N镶嵌于芳香层中,Re中的N存在3种形态,其中吡咯-N的比例高达55%;Re和As中,S以砜和硫酸酯2种形态为主,质量分数之和高于75%;就芳香取代度而言,As(σ=0.42)>Re(σ=0.35);Ar、Re和As中环烷环数、芳香环数和杂原子含量均依次增加。Using low-temperature Coal tar pitch as raw material,it was divided into saturates(Sa),aromatics(Ar),resins(Re)and asphaltenes(As)according to four-component analysis.Their compositions and structures were analyzed by X-ray photoelectron spectrometer(XPS),nuclear magnetic resonance(NMR),Fourier transform infrared spectrometer(FT-IR),elemental analyzer(EA),gel permeation chromatography(GPC)and UV-fluorescence spectrometer(UV)analyzer.The improved Brown-Ladner method was used to calculate the structural parameters of each component.The results show that the molecular weight of components follows the order of As(5008)>Re(1042)>Sa(771)>Ar(602).The relative content of C[FY=,1]O in Sa,Ar,Re and As increased sequentially,while the value of C—O shows an opposite change trend.Wherein,C-OH and C[FY=,1]O are the main form of oxygen-containing groups in Sa and As,respectively.All the N in Sa is in the form of amino-N,and the N in Ar and As is embedded in the aromatic layer with pyridine-N type.Three forms of N,i.e.amino-N,pyridine-N and pyrrole-N,are observed in Re.Wherein,the proportion of pyrrole-N is up to 55%.Sulphones and sulphates take the dominant room of S-containing groups in Re and As,being more than 75%.In addition,aromatic rings substitution degree of As(0.42)is higher than that of Re(0.35).The number of naphthenic rings,aromatic rings and the content of heterocyclic atoms in Ar,Re and As all increase successively.

关 键 词：低温煤沥青 四组分 结构参数 元素形态 

分 类 号：TQ530.2[化学工程—煤化学工程]