《工业分析 Industrial Analysis》课件-奥氏气体分析仪分析煤气含量（双语）

项目三：煤气质量分析任务三：煤气质量分析奥氏气体分析仪分析煤气含量课程：工业分析中文Scenario3:QualityanalysisofcoalgasTask3:QualityanalysisofcoalgasContentdeterminingofcoalgasusinganAustengasanalyzerCourse:IndustrialAnalysisEglish

一、奥氏气体分析仪用吸收剂1、氢氧化钾溶液（33％）

1份质量的氢氧化钾溶解于2份质量的蒸馏水中。2、焦性没食子酸的碱性溶液称取5克焦性没食子酸，溶解于15mL水中。另称取40克氢氧化钾溶解于32mL水中。临使用时混合两种溶液于吸收瓶中。3、氯化亚铜的氨性溶液称取250克氯化铵溶解于750mL水中，加200克氯化亚铜，溶解后，迅速转移于预先装有铜丝的试剂瓶中至几乎充满。用橡皮塞塞紧(溶液应无色)。临使用前，加入密度为0.9g/mL的氨水，其量是2体积的氨水与1体积的亚铜盐混合。中文

一、AbsorbentsforAustengasanalyzers1.Potassiumhydroxidesolution(33%)

Dissolve1partofpotassiumhydroxidein2partsofdistilledwater.2.Alkalinesolutionofpyrogallicacid

Weigh5gramsofpyrogallicacidanddissolveitin15mLofwater.Dissolve40gramsofpotassiumhydroxidein32mLofwater.Mixtwosolutionsinanabsorptionbottlebeforeuse.3.Ammoniabasedsolutionofcuprouschloride

Weigh250gramsofammoniumchlorideanddissolveitin750mLofwater,add200gramsofcuprouschloride,dissolveit,andquicklytransferittoareagentbottleprefilledwithcopperwireuntilalmostfull.Usearubberstoppertoplugtightly(thesolutionshouldbecolorless).Beforeuse,addammoniasolutionwithadensityof0.9g/mL,whichisamixtureof2volumesofammoniasolutionand1volumeofcuproussalt.Eglish4、硫酸银的硫酸溶液称取4克硫酸银溶解于65mL水中，在不断搅拌下，缓缓加入浓硫酸400mL。5、封闭液量气管的封闭液，可以用水、酸或盐的水溶液、甘油或汞。封闭液不得吸收被测定的气体。一般分析可以使用盐的饱和溶液(例如含1％盐酸的氯化钠饱和溶液；含2％硫酸的硫酸钠饱和溶液)。尽管气体在盐的饱和溶液中的溶解度很小。但是，为了进一步阻止气体溶解。在使用之前，仍必须用待分析的气体饱和。封闭液中还应加少量酸碱指示剂(例如甲基红)使溶液呈红色，以便于观察并可借以及时发现碱性吸收剂的倒流事故。中文4.Sulfuricacidsolutionofsilversulfate

Weigh4gramsofsilversulfateanddissolveitin65mLofwater.Slowlyadd400mLofconcentratedsulfuricacidwhilestirringcontinuously.5.Sealingliquid

Sealingsolution,whichcanbewater,acidorsaltaqueoussolution,glycerolormercury,shallnotabsorbthegasbeingmeasured.

Ingeneralanalysis,thesealingsolutioncanbeasaturatedsolutionofsalt(suchasasaturatedsolutionofsodiumchloridecontaining1%hydrochloricacidorasaturatedsolutionofsodiumsulfatecontaining2%sulfuricacid).Althoughthesolubilityofgasinsaturatedsaltsolutionsisverylow.However,inordertofurtherpreventgasdissolution.Beforeuseitisstillnecessarytouseagasanalyzedtosaturatesealingliquid.Asmallamountofacid-baseindicator(suchasmethylred)shouldalsobeaddedtothesealingsolutiontomakethesolutionturnred,soastofacilitateobservationandtimelydetectionofalkalineabsorbentbackflowaccidents.Eglish

二、测定步骤（1）用少量气样置换量气管三次；（2）准确取100.0毫升的气样分别用KOH、焦钾、氯化亚铜的氨溶液吸收，记录吸收后的体积为V1、V2、V3；（3）从V3中取出25.0毫升的气样，用空气稀释后，排入爆炸瓶进行爆炸燃烧后，记录燃烧后气体的体积为V4。中文

二、Measurementsteps(1)Replacethemeasuringtracheathreetimeswithasmallamountofgassample;(2)Accuratelytake100.0millilitersofgassamplesandabsorbthemwithammoniasolutionsofKOH,potassiumpyrogallicacid,andcuprouschloride.RecordtheabsorbedvolumesasV1,V2,andV3;(3)Take25.0millilitersofgassamplefromV3,diluteitwithair,anddischargeitintoanexplosionbottleforexplosivecombustion.RecordthevolumeofgasaftercombustionasV4.Eglish1、吸收部分三、结果计算

中文1、Absorptionpart三、ResultcalculationV0-volumeofsampletaken,mL;V1-thedifferenceingasvolumebeforeandafterabsorptionwithKOHsolution,mL;V2-thedifferenceingasvolumebeforeandafterabsorptionwithsilversulfatesolution,mL;V3-thedifferenceingasvolumebeforeandafterabsorptionwithanalkalinesolutionofpyrogallicacid,mL;V4-thedifferenceingasvolumebeforeandafterabsorptionwithanammoniasolutionofcuprouschloride,mL.Eglish2、燃烧部分在所取的25.00mL样品中氢气和甲烷体积的计算为：中文2、CombustionsectionThecalcu