mdea-teta-tea-h2o溶液吸收co2基础的研究

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1、DissertationSubmittedtoHebeiUniversityofTechnologyforTheMasterDegreeofChemicalTechnologyAFUNDAMENTALSTUDYOFCARBONDIOXIDEABSORPTIONINTOTHEAQUEOUSBLENDSOFN-METHYLDIETHANOLAMINE–TRIETHYLENETETRAAMINE-TRIETHANOLAMINEByYangJinSupervisor:Prof.HouKaihuNovember2012河北工业大学硕士学位论文MDEA-TETA-TEA-H2O溶液吸收CO

2、2的基础研究摘要以N-甲基二乙醇胺(MDEA)-三乙烯四胺（TETA）-三乙醇胺（TEA）混合胺水溶液吸收CO2为研究对象,在一定的温度和压力范围内，采用动态法实验测定了不同TEA浓度的混合胺溶液的CO2吸收速率、CO2吸收负荷和CO2的平衡分压。实验结果表明低温、高CO2分压、高TEA浓度有利于CO2的吸收。在简化的MDEA-TETA-TEA-H2O溶液吸收CO2机理的基础上，建立了CO2的平衡溶解度模型以及导出的CO2平衡分压方程，采用单纯形法确定了模型中的待定参数，模型的预测值与实验值基本吻合。基于测定的混合胺溶液吸收CO2的速率，建立了混合胺溶液吸收CO2的动力学模型

3、，模型的预测值与实验值吻合良好，模型可满足工业吸收脱碳装置的设计及优化操作的需要。关键词：MDEA-TETA-TEA-H2O溶液，脱碳，气液平衡，吸收动力学iMDEA-TETA-TEA-H2O溶液吸收CO2的基础研究AFUNDAMENTALSTUDYOFCARBONDIOXIDEABSORPTIONINTOTHEAQUEOUSBLENDSOFN-METHYLDIETHANOLAMINE–TRIETHYLENETETRAAMINE-TRIETHANOLAMINEAbstractTheCO2absorbtionperformanceoftheaqueoussoluti

4、onsmixedwithmethyldiethanolamine(MDEA),triethylenetetraamine(TETA)andtriethanolamine(TEA)havebeenstudied,andtheabsorptionrates,absorptionloadingsandCO2equilibriumpartialpressuresweremeasuredbyadynamicabsorptiontechniqueinacertainrangesoftemperature，CO2partialpressureandTEAconcentration.T

5、heresultsshowthatthelowtemperature,highCO2partialpressureandhighTEAconcentrationareinfavorofCO2absorption.Asimplifiedgas-liquidequilibriummodelfortheCO2MDEA-TETA-TEA-H2Osystemaredeveloped,andtheparametersofequilibriummodelareestimatedbysimplexmethod.PredictedandexperimentalCO2equilibriumsolu

6、bility,CO2equilibriumpartialpressuresareinfairagreement.BasedontheCO2absorptionratesobtained,akineticequationofCO2absorptioninthesolutionisestablished,andtheparametersintheequationaredetermined.PredictedandexperimentalCO2absorptionratesareingoodagreementandtheequationcanbeemployedfordesignan

7、doptimumoperationofcommercialCO2absorptionprocesses.KEYWORDS:MDEA-TETA-TEA-H2Osolution,carbondioxideremoval,gas-liquidequilibrium，absorptionkineticsii河北工业大学硕士学位论文目录第一章文献综述............................................................................