利用原子力显微镜探究颗粒在CO_2吸收膜表面的黏附力
|
摘要
利用搭建的原子力显微镜(AFM)黏附力测试平台,选取典型湿法脱硫净烟气中的细颗粒制备颗粒探针,研究分析了膜吸收CO_2过程中,飞灰颗粒和脱硫石膏颗粒对聚丙烯(PP)膜的污染机理;在相对湿度为0～85%的气氛下,测量了单个SiO_2颗粒和石膏颗粒与PP膜及颗粒间的黏附力,考察了表面粗糙度、相对湿度(RH)、颗粒物性等对黏附力的影响。结果表明:干燥条件下,膜表面粗糙度对颗粒在其上的黏附力影响不大;然而潮湿环境下黏附力受环境湿度影响较大,随着RH不断增加,SiO_2和石膏颗粒对膜的临界黏附力随RH的升高逐渐增加;潮湿条件下颗粒间的黏附力远大于颗粒与膜表面的黏附力,表明颗粒-颗粒的黏附作用可加速颗粒在膜表面的粘附沉积,导致严重的膜污染。
Membrane fouling mechanism was investigated using atomic force microscopy. The adhesion force of a single SiO_2 particle and gypsum particle on polypropylene membrane was measured under relative humidity(RH) of 0～85 %. Effects of surface roughness, RH and particle properties on adhesion were investigated. The results indicate that surface roughness has few effects on adhesion force under dry conditions. However, surrounding humidity has obvious effects on adhesion force under humid environment. The adhesion forces of fly-ash and gypsum particles increase gradually with the increase of RH. The adhesion forces between particles are much higher than that of SiO_2 to membrane, which contributes the most to the fouling of particles on membrane.
Membrane fouling mechanism was investigated using atomic force microscopy. The adhesion force of a single SiO_2 particle and gypsum particle on polypropylene membrane was measured under relative humidity(RH) of 0～85 %. Effects of surface roughness, RH and particle properties on adhesion were investigated. The results indicate that surface roughness has few effects on adhesion force under dry conditions. However, surrounding humidity has obvious effects on adhesion force under humid environment. The adhesion forces of fly-ash and gypsum particles increase gradually with the increase of RH. The adhesion forces between particles are much higher than that of SiO_2 to membrane, which contributes the most to the fouling of particles on membrane.
引文
[1]ZHANG L,QU R,SHA Y,et al.Membrane gas absorption for CO2 capture from flue gas containing fine particles and gaseous contaminants[J].International Journal of Greenhouse Gas Control,2015,33(33):10-17.
[2]ZHANG L,LI J,ZHOU L,et al.Fouling of impurities in desulfurized flue gas on hollow fiber membrane absorption for CO2 capture[J].Industrial&Engineering Chemistry Research,2015,55(29):8002-8010.
[3]BUFFLE J,LEPPARD G G.Characterization of aquatic colloids and macromolecules.1.Structure and behavior of colloidal material[J].Environmental Science&Technology,1995,29(9):2169-75.
[4]ELIMELECH M.Particle deposition and aggregation,measurement,modelling and simulation[J].Chemical Engineering Journal&the Biochemical Engineering Journal,1998,64(3):363-363.
[5]DUCKER W A,SENDEN T J,PASHLEY R M.Direct measurement of colloidal forces using an atomic force microscope[J].Nature,1991,353(353):239-241.
[6]BOWEN W R,HILAL N,LOVITT R W,et al.Characterization of membrane surfaces:direct measurement of biological adhesion using an atomic force microscope[J].Journal of Membrane Science,1999,154(2):205-212.
[7]RICHARD B W,DONEVA T A.Atomic force microscopy studies of membranes:effect of surface roughness on double-layer interactions and particle adhesion[J].Journal of Colloid&Interface Science,2000,229(2):544-549.
[8]LAMARCHE C Q,LEADLEY S,LIU P,et al.Method of quantifying surface roughness for accurate adhesive force predictions[J].Chemical Engineering Science,2016,158:140-153.
[9]RABINOVICH Y I,SINGH A,HAHN M,et al.Kinetics of liquid annulus formation and capillary forces[J].Langmuir the ACSJournal of Surfaces&Colloids,2011,27(22):13514-13523.
[10]RABINOVICH Y I,ADLER J J,ATA A.Adhesion between nanoscale rough surfaces:I.Role of asperity geometry[J].Journal of Colloid&Interface Science,2000,232(1):10-16.
[11]RABINOVICH Y I,ADLER J J,ATA A,et al.Adhesion between nanoscale rough surfaces[J].Journal of Colloid&Interface Science,2000,232(1):17-24.
[12]柳冠青,李水清,姚强.微生物颗粒与固体表面相互作用的AFM测量[J].工程热物理学报,2009,30(5):803-806.LIU G Q,LI S Q,YAO Q.AFM measurement of the interaction between a microsized fly ash particle and a substrate[J].Journal of Engineering Thermophysics.2009,30(5):803-806.
[13]DUCKER W A,SENDEN T J,PASHLEY R M.Measurement of forces in liquids using a force microscope[J].Langmuir,1992,8(7):1831-1836.
[14]CHEN H,ZHAO C,SHEN P.Effect of steam in flue gas on CO2 capture for calcium based sorbent[J].CIESC Journal,2013,64(4):1364-1372.
[15]ATCHARIYAWUT S,FENG C,WANG R,et al.Effect of membrane structure on mass-transfer in the membrane gas-liquid contacting process using microporous PVDF hollow fibers[J].Journal of Membrane Science,2006,285(1-2):272-281.
[16]FISHER L R,GAMBLE R A,MIDDLEHURST J.The Kelvin equation and the capillary condensation of water[J].Nature,1981,290(5807):575-576.
[17]孔明.颗粒粒径和形态计算机视觉测量方法研究[D].南京:东南大学,2005.KONG M.Investigation on the granularity and sharp of particle by computer vision[D].Nanjing:Southeast University,2005
[18]SEVILLE J P K.Inter-particle forces in fluidization:a review[J].Powder Technology,2000,113(3):261-268.
[2]ZHANG L,LI J,ZHOU L,et al.Fouling of impurities in desulfurized flue gas on hollow fiber membrane absorption for CO2 capture[J].Industrial&Engineering Chemistry Research,2015,55(29):8002-8010.
[3]BUFFLE J,LEPPARD G G.Characterization of aquatic colloids and macromolecules.1.Structure and behavior of colloidal material[J].Environmental Science&Technology,1995,29(9):2169-75.
[4]ELIMELECH M.Particle deposition and aggregation,measurement,modelling and simulation[J].Chemical Engineering Journal&the Biochemical Engineering Journal,1998,64(3):363-363.
[5]DUCKER W A,SENDEN T J,PASHLEY R M.Direct measurement of colloidal forces using an atomic force microscope[J].Nature,1991,353(353):239-241.
[6]BOWEN W R,HILAL N,LOVITT R W,et al.Characterization of membrane surfaces:direct measurement of biological adhesion using an atomic force microscope[J].Journal of Membrane Science,1999,154(2):205-212.
[7]RICHARD B W,DONEVA T A.Atomic force microscopy studies of membranes:effect of surface roughness on double-layer interactions and particle adhesion[J].Journal of Colloid&Interface Science,2000,229(2):544-549.
[8]LAMARCHE C Q,LEADLEY S,LIU P,et al.Method of quantifying surface roughness for accurate adhesive force predictions[J].Chemical Engineering Science,2016,158:140-153.
[9]RABINOVICH Y I,SINGH A,HAHN M,et al.Kinetics of liquid annulus formation and capillary forces[J].Langmuir the ACSJournal of Surfaces&Colloids,2011,27(22):13514-13523.
[10]RABINOVICH Y I,ADLER J J,ATA A.Adhesion between nanoscale rough surfaces:I.Role of asperity geometry[J].Journal of Colloid&Interface Science,2000,232(1):10-16.
[11]RABINOVICH Y I,ADLER J J,ATA A,et al.Adhesion between nanoscale rough surfaces[J].Journal of Colloid&Interface Science,2000,232(1):17-24.
[12]柳冠青,李水清,姚强.微生物颗粒与固体表面相互作用的AFM测量[J].工程热物理学报,2009,30(5):803-806.LIU G Q,LI S Q,YAO Q.AFM measurement of the interaction between a microsized fly ash particle and a substrate[J].Journal of Engineering Thermophysics.2009,30(5):803-806.
[13]DUCKER W A,SENDEN T J,PASHLEY R M.Measurement of forces in liquids using a force microscope[J].Langmuir,1992,8(7):1831-1836.
[14]CHEN H,ZHAO C,SHEN P.Effect of steam in flue gas on CO2 capture for calcium based sorbent[J].CIESC Journal,2013,64(4):1364-1372.
[15]ATCHARIYAWUT S,FENG C,WANG R,et al.Effect of membrane structure on mass-transfer in the membrane gas-liquid contacting process using microporous PVDF hollow fibers[J].Journal of Membrane Science,2006,285(1-2):272-281.
[16]FISHER L R,GAMBLE R A,MIDDLEHURST J.The Kelvin equation and the capillary condensation of water[J].Nature,1981,290(5807):575-576.
[17]孔明.颗粒粒径和形态计算机视觉测量方法研究[D].南京:东南大学,2005.KONG M.Investigation on the granularity and sharp of particle by computer vision[D].Nanjing:Southeast University,2005
[18]SEVILLE J P K.Inter-particle forces in fluidization:a review[J].Powder Technology,2000,113(3):261-268.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |