神府煤及其煤巖組分催化石墨化研究.pdf

1、論文題目：神府煤及其煤巖組分催化石墨化研究專業(yè)：化學(xué)工藝碩士生：張曉欠（簽名）指導(dǎo)教師：周安寧邱介山（簽名）摘要石墨材料具有耐高溫、耐腐蝕、自潤(rùn)滑、抗熱震、導(dǎo)熱及導(dǎo)電等其它材料所不可比擬的優(yōu)越性能，已經(jīng)在航空、航天、核工業(yè)、軍工以及許多民用工業(yè)領(lǐng)域得到了廣泛的應(yīng)用。無(wú)煙煤是制備石墨材料的常用炭質(zhì)原料之一，但無(wú)煙煤是我國(guó)的稀缺煤炭資源。因此，有必要開(kāi)辟煙煤制備石墨材料研究。本論文重點(diǎn)研究了神府煤及其煤巖組分催化石墨化過(guò)程，考察了催化劑種類

2、、添加量、煤粉粒度及熱處理溫度等因素對(duì)神府煤及其煤巖組分催化石墨化過(guò)程的影響。通過(guò)X射線衍射，拉曼光譜手段對(duì)石墨化產(chǎn)物結(jié)構(gòu)進(jìn)行了表征，同時(shí)通過(guò)掃描電子顯微鏡、電子能譜等分析了碳材料催化石墨化前后的形貌特征及元素組成，并對(duì)神府煤的催化石墨化機(jī)理進(jìn)行了探討，主要研究結(jié)果如下：（1）研究了粒度、溫度對(duì)神府煤石墨化過(guò)程的影響。通過(guò)掃描電子顯微鏡，能譜分析儀，拉曼光譜和X射線能譜儀等檢測(cè)手段對(duì)石墨化樣品的微觀形貌，結(jié)構(gòu)及組成進(jìn)行了分析。結(jié)果表明，

3、減小粒度有利于神府煤的石墨化。粒徑越小，石墨化后樣品的微晶結(jié)構(gòu)越規(guī)整當(dāng)神府煤的粒徑D9020μm時(shí)，經(jīng)2500℃高溫石墨化后，樣品的石墨化度為65.93%。（2）研究了神府煤鏡質(zhì)組和惰質(zhì)組的高溫（2500℃）石墨化的差異。掃描電子顯微鏡，能譜分析儀，拉曼光譜和X射線能譜儀等檢測(cè)分析表明，當(dāng)神府煤鏡質(zhì)組和惰質(zhì)組的粒徑D9075μm時(shí)，經(jīng)2500℃高溫?zé)崽幚砗螅涫确謩e為54.19%和65.93%，與鏡質(zhì)組相比，惰質(zhì)組更易石墨化。（3

4、）用掃描電子顯微鏡，能譜分析儀，拉曼光譜和X射線能譜儀等檢測(cè)手段研究了氯化鐵對(duì)神府煤石墨化過(guò)程的影響。結(jié)果表明，當(dāng)神府煤的粒徑D9020μm時(shí)，添加氯化鐵作為催化劑，煤粉與鐵元素比例為5:1時(shí)，在2500℃熱處理后樣品的石墨化度為77.56%，層間距為0.3373nm。（4）研究了硼酸對(duì)神府煤石墨化過(guò)程的影響。通過(guò)掃描電子顯微鏡，能譜分析儀，拉曼光譜和X射線能譜儀等檢測(cè)手段對(duì)石墨化樣品的微觀形貌，結(jié)構(gòu)及組成進(jìn)行了分析。結(jié)果表明，當(dāng)神府煤

5、的粒徑D9020μm時(shí)，添加硼酸作為催化劑，煤粉與硼元素比例為5:1時(shí)，在2500℃熱處理后樣品的石墨化度為80.35%，層間距為0.3371nm。Subject:StudyonCatalyticGraphitizationofShenfuCoalMaceralsSpecialty:ChemicalTechnologyName:ZhangXiaoqian（Signature）Instruct:ZhouAnningQiuJieshan（S

6、ignature）ABSTRACTGraphitematerialsarewidelyusedinthefieldsofaviationaerospacenuclearmilitaryindustrialsmanycivilianindustrialsowingtotheirsuperperfmancessuchashightemperatureresistancecrosionresistanceselflubricatingheat

7、shockresistancehighthermalconductivityelectricalconductivityetccomparedtoothermaterials.Anthraciteisoneofthecarbonaceousmaterialsfpreparinggraphitematerials.Becauseanthraciteisakindofscareresourceweaimtoexplethegraphitiz

8、ationofbituminouscoalinthispaper.ThisstudyhighlightedthecatalyticgraphitizationprocessofShenfucoalsitsmaceralsinvestigatedtheeffectsofcatalysttypeamountpulverizedcoalparticlesizeheattreatmenttemperatureonthecatalyticgrap

9、hitizationprocessofShenfucoalsmacerals.ThestructuresofgraphitizationproductswereacterizedusingXRDRamanthemicromphologystructureelementarycompositionofShenfucoalbefeaftergraphitizationprocessbymeansofSEMEDSfurthermethemec

10、hanismofcatalyticgraphitizationwasexamined.Themainresearchcontentsobtainedresultsarepresentedasfollows:(1)TheinfluencesofparticlesizetemperatureofgraphitizationprocessofShenfucoalwerestudied.Themicromphologystructureelem

11、entsofgraphitizationproductsampleswereacterizedbySEMEDSRamanXRDetc.TheresultsshowthatthedecreaseofparticlesizeofShenfucoalfacilitatesthegraphitizationprocessthesmallertheparticlesizethestructureofthemicrocrystalismeregul

12、arity.Whentheparticlesize(D90)ofShenfucoalisbelow20μmthedegreeofgraphitizationofsamplesis65.93%afterhightemperaturegraphitizationtreatmentat2500oC.(2)ThestructuredifferenceofvitrinitefusiniteofShenfucoalafterhightemperat

13、uregraphitizationtreatmentwasinvestigated.Theresultsdemonstratethatwhentheparticlesize(D90)ofvitrinitefusiniteofShenfucoalisnolessthan75μmafterthermaltreatmentofhightemperature2500oCthedegreesofgraphitizationofsamplesare