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73 个结果
  • 简介:Anewroutewasdevelopedforthesynthesisofrenewabledecalinwithcyclopentanonewhichcanbederivedfromlignocellulose.Itwasfoundthat1,2,3,4,5,6,7,8-octahydronaphthalenecouldbeselectivelyproducedbythehydrogenation/dehydration/rearrangementof[1,1-bi(cyclopentylidene)]-2-one(i.e.theselfaldolcondensationproductofcyclopentanone)overadual-bedcatalystsystem.Amongtheinvestigatedcatalysts,theRu/CandAmberlyst-15resinexhibitedthehighestactivitiesforthehydrogenationof[1,1-bi(cyclopentylidene)]-2-oneto[1,1-bi(cyclopentan)]-2-olandthedehydration/rearrangementof[1,1-bi(cyclopentan)]-2-olto1,2,3,4,5,6,7,8-octahydronaphthalene,respectively.UsingRu/CandAmberlyst-15resinasthefirstbedandthesecondbedcatalysts,1,2,3,4,5,6,7,8-octahydronaphthalenewasdirectlyproducedinhighcarbonyield(83.7%)undermildconditions(393K,1MPa).Afterbeinghydrogenated,the1,2,3,4,5,6,7,8-octahydronaphthalenewasconvertedtodecalinwhichcanbeusedasadditivetoimprovethethermalstabilityandvolumetricheatvalueofjetfuel.

  • 标签: LIGNOCELLULOSE Jet fuel ADDITIVE ALDOL condensation
  • 简介:关于常规石块的普遍使用的有害效果增强担心一般来说在海洋的领域里并且在内燃机造成,导致了努力并且向研究指导大大写的投资的广阔数量,持续其他的精力的开发采购原料。最答应之一并且这些来源丰富是氢。第一,当前的石块燃料的使用被讨论集中于排出物和经济方面作为一种合适的可能的选择与氢的特别参考为新、更干净、可更新的燃料强调需要。氢性质,生产和存储方法然后从节俭的观点与它的适用性一起被考察。最后,为在内燃机的氢的使用的费用分析被执行为柴油机作为代替说明它的使用的好处。这的结果花费了98%大写的开销被设备消费的分析表演,并且设备的68.3%全部的费用在太阳的光电的房间上被花。因为它是大约10亿的高起始的费用,氢植物作为一个大投资工程被分类US$;但是因为氢以一个完全绿的方法被生产,这被认为正当。当氢被用作燃料时,没有有害排出物被获得。

  • 标签: 化石燃料 制氢 太阳能光伏电池 有害排放物 单位 内河
  • 简介:Anewtypeofmixturefuel,sludge-oil-coalagglomerate(SOCA),wascatalyticallygasifiedwithsteaminathermobalancereactorunderatmosphericpressure.Allthefourcatalystsstudied(K2CO3,CaO,NiOandFe2O3)werefoundcapableofenhancingthesteamgasificationrateandsignificantlyincreasingtheconversionofcarbon.TherankingofcatalyticactivitywasfoundtobeK2CO3CaO>NiO>Fe2O3.Amodifiedvolumetric-reactionmodelintheliteraturewasusedtodescribetheconversionbehaviorofthesteamgasificationstudiedbyevaluatingthekineticparameters.ExpressionsoftheapparentgasificationratesforSOCAwerepresentedforthedesignofcatalyticgasificationprocesses.

  • 标签: SLUDGE Coal Oil STEAM GASIFICATION CATALYST
  • 简介:Alloftheplantscanbecombusted.Themechanismofforestbeltsresistanceisthatthetreespeciesweren'tliabletobeburnedcomparedwithotherplantspecies.Inthispapernewconceptsonfireresistanttreesandfuel-breakstreeswerepresented.Thefireresistancemechanismincludes3aspects,fire-resistanttreespecies,rationalconstructionforestbeltsandenvironment.Treecrownscanresistfireforwarding.Forestbeltscanformtheenvironment,whichisnoteasytofire,andalsomakefuelsdistributeddiscontinuous.Thenetworkofforestbeltshaslargeareaofconiferforestsegregated.Theidealf'ireresistanttreespecieshadbettertoembracesomecharacteristics,suchashighf'ireresistance,rationalplantingandbiologicalcharacteristics.

  • 标签: 中国 西南地区 森林火灾 耐火树种 易燃树种 防火机理
  • 简介:一个零维的单个地区的双曲线模型被介绍在成层的电荷引擎预言燃料燃烧速率,并且预言成层的电荷引擎的全面表演与GT力量是综合的。模型为在不同电荷地区计算燃料燃烧速率由二指数的功能组成。模型因素由一种非线性的曲线试穿技术的redetermined,基于在中间、低的负担从30cases获得的试验性的数据。结果证明在测量并且计算的柱体压力之间的好同意,和在计算、测量的柱体压力之间的偏差是不到5%。零维的单个地区的双曲线模型在为成层的电荷引擎当模特儿的燃烧是成功的。

  • 标签: 分层进气 内燃机 汽油发动机 燃烧速率 模拟模型
  • 简介:考虑在精炼厂处理的实际粗略的板岩,做合理联合是必要的并且原油相配。为了在柴油应付高蜡内容,为了在柴油应付高蜡内容被建议适当地调整精制过程计划并且在在生产实践被使用以后把添加剂加到精制products.This措施引起了好结果并且满足了商业生产的需要。

  • 标签: 倾点下降剂 柴油机 混合物 商业应用 燃料
  • 简介:Amonolithichybridfuelcell(MHFC)withanovelconfigurationwasproposedinanefforttoimprovethefuelcellperformanceduringinstantaneouspowerchanges.Amodifieddirectmethanolfuelcell(DMFC)withalayerofhydrousrutheniumdioxide(RuO2·xH2O)sandwichedbetweentheanodecatalystlayerandmembranewasusedtodemonstratetheprincipleoftheMHFC.ExperimentalresultsindicatethattheRuO2·xH2Olayerisequivalenttoaresistor-capacitortransmissionlineandfunctionssimilartoacapacitorinparallelwiththeanodeelectrode.TheimprovementindynamicresponseoftheMHFCwasexperimentallyconfirmedunderstepcurrentchangeandsquarecurrentpulseoperating.TheionicconductivityoftheRuO2·xH2Olayerwasalsoobtained.

  • 标签: HYBRID devices direct METHANOL fuelcells HYDROUS
  • 简介:Accordingto350MWand600MWboilers,underoxygenfuelcondition,throughthereasonablecontroloftheprimaryandsecondaryflowandthecorrectoptionandrevisionofmathematicalmodel,thetemperaturedistribution,heatfluxdistributionandabsorptionheatdistribution,etc.wasobtainedwhichcomparedwiththoseunderaircondition.Throughcalculation,itisobtainedthattheprimaryandsecondaryflowmixedwell,goodtangentiallyfiredcombustioninfurnacewasformed,thetemperatureunderairconditionobviouslyhigherthanthetemperatureunderO26condition.Theadiabaticflametemperatureofwetcyclewasslightlyhigherthanthatofdrycycle.Themaximumheatloadappearedonthewaterwallaroundtheburnerarea.Theheatloadgraduallydecreasedalongthefurnaceheightupanddowninburnerarea.TheheatabsorptioncapacityofthefurnaceunderO26waslowerthanthatundertheaircondition.Theheatabsorptioncapacityoftheplatenheatingsurfaceunder026wasequaltothatunderaircondition.AndtheheatabsorbingcapacityofwaterwallunderO26wasabout7%~12%lessthanthatunderaircondition.

  • 标签: 燃烧锅炉 锅炉燃料 传热特性 氧气 温度分布 绝热火焰温度
  • 简介:Thepapershortlyreviewsthebasicdirectapproachesappliedinsearchingforviablesolutionstosolarfuelproduction.Thesearegenerallydistinguishedinmolecularandsemiconductor(non-molecular)systems,however,hybridstrategies,proposedrecently,havealsobeenincluded.Themostpromisingeffortsareconsidered,highlightingkeyaspectsandemergingcriticalissues.Specialattentionispaidtoaspectssuchaselectrodearchitecture,devicedesign,andmaindifferencesinthescientificvisionandchallengestodirectlyproducesolarfuels.Thisoverviewcouldbeusefultoorientatethereadersinthewidepanoramaofresearchactivitiesconcerningwatersplitting,naturalandartificialphotosynthesis,andsolarfuelproductionthroughtheidentificationofcommonaspects,specialtiesandpotentialitiesofthemanyinitiativesandapproachesthataredevelopingworldwideinthisfieldwiththefinalaimtomeetworldenergydemand.

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  • 简介:Anincreasingnumberofannealingfurnaceshaverecentlybeenusingcheaperandcleanernaturalgas(NG)insteadofliquefiedpetroleumgas(LPG)asfuelgas.However,thefuelgasofthefurnacesoftenneedstobechangedwhenNGsupplyisnotadequateorwhenLPGbecomescheaper.Usually,changingthefuelgasinvolveschangingvariousequipmentaswellascontrolparametersforinstrumentsandthecontrolsystemandhenceistimeconsuming.Therefore,itisimportanttodevelopaquickprocessforchangingfuelgas.Thisstudydiscussesthetechniquesforquicklychangingfuelgasinanannealingfurnace.Thesetechniquesdealwiththedesignofthepipe,valveandburner,theselectionoftheflowmeterandtheflowcontrolvalve,theswitchofthesoftwareandparametersforthecontrolsystem,aswellastheoperation,commissioningandhottestofthefurnacewhenthefuelgasischanged.Usingthesetechniques,itispossibletochangefuelgasin6h.

  • 标签: 连续退火炉 气体燃料 技术 燃料气体 液化石油气 流量控制阀
  • 简介:Foranthracitewithverylowcontentofvolatilematter,alltheboilermakersofinternationalprestigeproposefurnaceswithU-ordoubleU-flamefortheburningofsuchfuel.Fortheexisting4-cornertangentialfiringboilersinFujianpowerplants,muchresearchandinnovationeffortshavebeenexpendedtoburnFujiananthracites,andnotableimprovementofcombustionconditionswasattained.Thisledtoourbeliefthattangentialfiringboilerscanalsosuccessfullyfireanthracitewithverylowvolatilematter.ThispaperoutlinestheresearchanddevelopmentworkonsuchboilersinpowerplantsinFujianProvince.

  • 标签: 气管 卫气 玉石 巨口 双曲 巴山
  • 简介:一个模拟模型一电子地控制了二个螺线管阀门燃料注射系统因为一台柴油机引擎在AMESim环境被建立。模型的精确性与试验性的数据通过比较被验证。在不同控制模式下面的主要注射的数量上的注射前控制参数的影响被分析。在喷洒控制阀门模式,主要注射的燃料数量逐渐地减少然后因为多注射居住时间的增加,到达稳定的水平。在针控制阀门模式,主要注射的燃料数量与升起的多注射居住时间增加;这效果在高速度的革命和大主要注射的脉搏宽度变得更明显。注射前脉搏宽度没在二个控制模式下面在主要注射的数量上有明显的影响;在主要注射的数量的变化在1mm3的范围。

  • 标签: 燃油喷射系统 控制参数 预喷射 电磁阀 柴油机 燃油量
  • 简介:Thesynthesisandpropertiesofcarbonxerogelsarebrieflydescribedinthismini-review,emphasizingthemethodsusedfortuningtheirsurfacechemistryandtexturalpropertiesinordertodesignefficientelectrocatalystsforfuelcells.Inparticular,theroleplayedbythesurfacefunctionalgroupsindeterminingtheloading,dispersion,oxidationstateandstabilityofthemetalphasesisaddressed.

  • 标签: 燃料电池 干凝胶 合成 催化剂 表面官能团