煤焦油重组分沥青质性质分析及对加氢裂化生焦影响的推测.pdf

第卷第期燃料化学学报Vol.No.
428摇摇摇摇摇428
年月JournalofFuelChemistryandTechnologyAug.
201482014

文章编号:鄄鄄鄄
02532409(2014)08093807
煤焦油重组分沥青质性质分析及对加氢裂化生焦影响的推测

吴乐乐,邓文安,李传,张英红,王晓杰
摇
中国石油大学华东重质油国家重点实验室山东青岛
((),摇266580)
摘要:从中/低温煤焦油中切取重组分提取了重组分C鄄沥青质并以此重组分为原料进行了高压釜加氢实验通过
摇,7,,
1H鄄NMRXRDFT鄄IRSEM元素分析和相对分子量测定等手段对重组分沥青质结构参数官能团表观形态等方面进行了分
、、、、、、
析并将其与加氢过程中生焦情况进行了关联结果表明C鄄沥青质基本结构单元以稠环芳烃为中心周围分布少而短的侧
,。,7,
链侧链以小于个碳的短直链正构烷基为主相对分子量小芳香片层没有堆积结构O是该沥青质中氢键主要来源大多
,3,,。,
分布在环氧烷烃和醚类结构中外围的O数量低分子间氢键更难形成结构单元之间缔合性弱沉积聚合慢而均匀沥青质
,,,,。
中短侧链不易断裂在反应过程中产生的稠环芳烃自由基少缩合能力小使该馏分油生焦能力低具有较高的加氢潜质
,,,,。
关键词:中/低温煤焦油重组分加氢正庚烷沥青质结构参数缩合生焦
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中图分类号:TQ文献标识码:A
524摇摇
Propertiesofcoaltarheavyfractionanditsrelevancetocokinginhydrocracking

WULe鄄leDENGWen鄄anLIChuanZHANGYing鄄hongWANGXiao鄄jie
StateKeyLaboratoryofH,eavyOilProcessing,ChinaUniv,ersityofPetroleumHua,dongQingdaoChina
(,(),摇266580,)
AbstractThehydrogenationexperimentontheheavyfraction益ofmedium/lowtemperaturecoaltar
preparedb:yvacuumdistillingwasconductedinanautoclave(>a3n5d0the)asphaltenewasseparatedfromheavy,
fractionwithn鄄heptanesolven,t.Thepropertiessuchasstructure,parametersfunctionalgroupandmicrostructure
,
wereanalyzedby1H鄄NMRXRDFT鄄IRSEMultimateanalysisandaveragemolecularweightdetermination
VPO.Moreovertherel,evance,ofcokin,gtoC,鄄asphaltenepropertieswasdiscussed.TheresultsshowthatC鄄
a(sphalt)eneunitsare,mainlycomposedofpolycycl7icaromaticslinkedinsidewithafewandshortaliphaticchain7s
mainlyn鄄alkanelessthanCatoms.Theasphalteneunitshavesmallaveragemolecularweightsandthereis
n(oaromaticsheetstacking3structuree)xisting.Thepropensitytoaggregateforasphalteneunitswasweakened
becauseOatomsinasphaltenearemainlydistributedinepoxyalkaneorethersCOCandtheyaredifferent
fromthepetroleumasphaltenewhoseOatomsexistintheperipheralphenolic(and-al-coh)olichydroxyl.Sothe
intermolecularhydrogenbondismoredifficulttobuild.Furthermoreshortchainsarenoteasytobreak,and
fewerpolycyclicaromaticradicalsaregeneratedinthehydrocracking,processandtheasphaltenehasalower
cokingpotential.,
Keywordsmedium/lowtem