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1、摘要離子交換樹脂應(yīng)用在燃料乙醇水解糖酸液分離工藝中有著廣闊的應(yīng)用前景,對(duì)解決工業(yè)上以石灰石中和水解液的方法所造成的硫酸無法回收再利用,污染環(huán)境,乙醇產(chǎn)率低的等問題具有極其重要的意義。本文以離子排斥色譜法為理論研究依據(jù),針對(duì)高濃度的糖酸液分離進(jìn)行了系統(tǒng)的試驗(yàn)和理論研究,為工業(yè)中樹脂的篩選和動(dòng)力學(xué)研究提供基礎(chǔ)數(shù)據(jù)。在離子排斥色譜法分離糖酸的基礎(chǔ)上,采用靜態(tài)吸附的方法比較了五種國(guó)產(chǎn)工業(yè)樹脂對(duì)糖溶液的吸附能力,初步篩選出001x4和syno7兩種型號(hào)的樹脂,做為木質(zhì)纖維素水解糖酸液的分離工藝所需的離子交換樹脂。并分析了不同溫度
2、、pH值、吸附時(shí)間、糖濃度等各因素對(duì)吸附效果的影響。結(jié)果表明:恒溫水浴連續(xù)震蕩12小時(shí),在pH=3.0,T=323K,初始濃度為10%(質(zhì)量分?jǐn)?shù))時(shí),001x4樹脂對(duì)糖酸液中糖的吸附性能達(dá)到最好,靜態(tài)吸附量為304.61mg/g,吸附率達(dá)到29.30%。通過對(duì)糖吸附動(dòng)力學(xué)和熱力學(xué)研究表明,001x4樹脂對(duì)糖的吸附動(dòng)力學(xué)可用擬二級(jí)動(dòng)力學(xué)方程描述。設(shè)計(jì)了樹脂動(dòng)態(tài)吸附分離實(shí)驗(yàn)裝置,在進(jìn)料糖濃度為10%、柱高60cm,分離溫度27℃、吸附液流量1.0—1.2ml/min條件下,測(cè)定了木質(zhì)纖維素水解糖酸液的吸附操作穿透曲線。實(shí)驗(yàn)
3、結(jié)果表明新柱和再生柱的穿透曲線基本一致,符合樹脂對(duì)糖液和酸液的吸附一分離機(jī)理。證明樹脂對(duì)混合糖酸液具有很好的分離能力,且再生后的樹脂柱也具有良好的吸附一脫附性能。關(guān)鍵詞:燃料乙醇,酸值,離子交換樹脂,靜態(tài)吸附,穿透曲線ABSTRACT42Ionexchangeresinsusedinfuelethanolacidhydrolysisofsugarseparationprocesshasbroadapplicationprospects,ithasgreatimportanceforthcommonlywayinthei
4、ndustryUselimestonetoneutralizatehydrolysis,whichmeanlycausednosulfuricacidrecycling,pollutionoftheenvironment,lowethanolproductionrate,andSOon.thispaperbasedonionexclusionchromatography,didasystemExperimentalandTheoreticalStudyfortheacidseparationwithhighconcen
5、trations,hydrolysisofcellulose,providethebasicdatafortheadsorptionkineticswithindustrialresin.basedonthemethodofionexclusionchromatographictoseparatesugarandacid,throughstudyonstaticadsorptiontests,Theadsorptioncapacityofsugarsolutionbetweenfivekindsofdomesticin
6、dustrialresinWasexamined,The001x4andsyno7resinswerechosenusingstaticadsorption,toseparatethesugarsolutionintheacidhydrolysisofcelluloseprocess.Influencesoftemperature,pHvalue,adsorptiontimeandtheconcentrationonsugaradsorptionefficiencyinthehydrolysiswasalsobeAna
7、lyzed.Theresultsyndicatedthatthehighestadsorptioncapacityof001x4resinsugarsolutioncallreach304.61mg/gatpH=3.0,T=323K,theinitialsugarconcentrationof10%(bymass).Accordingtotheadsorptionkineticsandthermodynamicsofsugarsolution,theadsorptionkineticsequationof001x4on
8、sugarsolutionwasavailabletothesecondorderkineticequation,Provedthatthechooseresinhavegoodadsorptioncapacity.Independentdesignedthedynamicadsorptiondeviceforseparation