PVDF中空纤维膜吸收器捕获烟气CO_2的工艺技术[精品].doc

PVDF中空纤维膜吸收器捕获烟气CO_2的工艺技术 第63卷第2期 2012年2月 化工 CIESC Journal Vo1.63NO.2 February2012 PVDF中空纤维膜吸收器捕获烟气 CO2的工艺技术 赖春芳,杨波,张国亮,温彩哨,曹荣.,吴蓉蓉 (浙江工业大学生物与环境工程学院,浙江杭州310014;华电电力科学研究院,浙江杭州31003O) 摘要:以水(H2O),氢氧化钠(NaOH),氨基乙酸钾(GLY),氨基乙酸钾一哌嗪(GLY-PZ)水溶液为吸收剂, 研究了疏水性聚偏氟乙烯(PVDF)中空纤维膜接触器分离CO/N模拟烟气中CO.的技术,具体考察了流动方 式,气液流率,吸收液浓度和温度,原料气CO浓度,填充密度等对膜接触器吸收效率的影响.结果表明,气 液逆流的腔流程模式具有较高的分离效率.不同吸收剂的分离性能为:NaOHgt;GLY—Pzgt;GLYgt;HO.温度对 各种吸收剂的影响随其种类不同而有所差异.膜接触器对烟气CO.的分离效率随填充密度,吸收液浓度和流率 的提高而增大,随气体流率及其中COz浓度的增大而减小. 关键词:二氧化碳;膜吸收;中空纤维膜接触器;烟气 DOI:10.3969/j.issn.0438—1157.2012.02.023 中图分类号:TQ028.8文献标志码:A文章编号:0438～1157(2012)02—0500—08 FactorsinfluencingCo2capturebyPVDFmembranecontactor LAIChunfang,YANGBo,ZHANGGuoliang,WENCaishao, CAORong~,WURongrong (CollegeofBiologicalamp;EnvironmentalEngineering,ZhejiangUniversityofTechnology,Hangzhou310014, Zhejiang,China;HuadianElectricPowerResearchInstitute,Hangzhou310030,Zhejiang,China) Abstract:Polyvinylidinefluoride(PVDF)hollowfibermembranecontactorswereappliedtothe separationofcarbondioxide(CO2)fromfluegasusingwater(H2O),threeaqueoussolutionsofsodium hydroxide(NaOH),potassiumglycine(GLY),andpotassiumglycine-piperazine(GLY桺Z)as absorptionsolvents.Effectsofflowmode,flowratesoffeedgasandabsorbent,concentrationand temperatureofabsorbent,concentrationoffeedgas,andpackingdensityontheremovalrateandtotal masstransfercoefficientwereinvestigated.Resultsshowthatthelumensideprocesswithtwophases flowingcountercurrent1yhasthehighestseparationefficiency.Theabsorptionperformanceoffour absorbentsiSinthesequenceofNa0Hgt;GLY桺Zgt;GLYgt;H,0.Theeffectoftemperatureonvarious absorbentsisdifferent.TheseparationefficiencyofCO2canbeenhancedbyincreasingthepackingdensity, concentrationandflowrateofabsorbent,whiledecreasedwiththeincreaseofconcentrationandflowrate offluegas. Keywords:carbondioxide;membraneabsorption;hollowfibermembranecontactor;fluegas 2011—06—18收到初稿,2011—08—01收到修改稿. 联系人:张国亮.第一作者:赖春芳(1986一),男,硕士研 究生. 基金项目:国家自然科学基金项目20976163) 浙江省重大科技计划项目(20o8C13o14—2). Receiveddate:201l一06