采用气相EPICS(equilibrium partitioning in closed system)法研究了甲苯与非离子表面活性剂TritonX-100(TX100)溶液间气液平衡分配关系.研究表明,甲苯的表观亨利系数(Hc)随TX100浓度的增加而降低,TX100可明显地影响甲苯在气液相的分...采用气相EPICS(equilibrium partitioning in closed system)法研究了甲苯与非离子表面活性剂TritonX-100(TX100)溶液间气液平衡分配关系.研究表明,甲苯的表观亨利系数(Hc)随TX100浓度的增加而降低,TX100可明显地影响甲苯在气液相的分配行为,抑制甲苯挥发;当TX100的浓度低于其临界胶束浓度(CMC),浓度的增加对Hc影响不明显,抑制甲苯挥发能力相对较弱;浓度大于CMC,Hc随表面活性剂浓度的增加迅速降低.温度对Hc的影响显著,温度升高,相应Hc也随之增大.展开更多
The aim of this research is to study the effect of hydrophilic silica nanoparticles,sizes as CO_(2) foam stabilizer in the presence of nonionic TX100 surfactant.Two nanosilica sizes,15 and 70 nm,have been examined tho...The aim of this research is to study the effect of hydrophilic silica nanoparticles,sizes as CO_(2) foam stabilizer in the presence of nonionic TX100 surfactant.Two nanosilica sizes,15 and 70 nm,have been examined thoroughly.Physisorption of TX100 on silica nanoparticles(nanosilica)was characterized by adsorption isotherm and surface tension measurement,while CO_(2) foams stability was quantified based on their foamability,foam stability,particle partitioning in the foams,and bubble sizes.Results show that direct contact of TX100 with nanosilica does altered the wettability of hydrophilic nanosilica surface,enable them to lengthen CO_(2) foams life at certain surfactant and nanoparticles concentrations.For 15 nm nanosilica,CO_(2) foam stability shows excellent performance at 0.1 and 0.5 wt%TX100 concentrations.As for 70 nm nanosilica,CO_(2) foam demonstrates longer lifetime at much lower TX100 concentration,0.01 wt%.Without the presence of TX100,CO_(2) foams exhibit undesirable lifetime performances for both nanosilica sizes.Nanosilica partitioning in CO_(2) foams structures demonstrate consistent relation with contact angle measurement.Estimated bubble sizes shows insignificant effect on CO_(2) foams life.With the assists of nanosilica and TX100,enhanced oil recovery via CO_(2) foam injection succeeds in increasing oil production by 13e22%of original oil-in-place(OOIP).展开更多
文摘采用气相EPICS(equilibrium partitioning in closed system)法研究了甲苯与非离子表面活性剂TritonX-100(TX100)溶液间气液平衡分配关系.研究表明,甲苯的表观亨利系数(Hc)随TX100浓度的增加而降低,TX100可明显地影响甲苯在气液相的分配行为,抑制甲苯挥发;当TX100的浓度低于其临界胶束浓度(CMC),浓度的增加对Hc影响不明显,抑制甲苯挥发能力相对较弱;浓度大于CMC,Hc随表面活性剂浓度的增加迅速降低.温度对Hc的影响显著,温度升高,相应Hc也随之增大.
文摘The aim of this research is to study the effect of hydrophilic silica nanoparticles,sizes as CO_(2) foam stabilizer in the presence of nonionic TX100 surfactant.Two nanosilica sizes,15 and 70 nm,have been examined thoroughly.Physisorption of TX100 on silica nanoparticles(nanosilica)was characterized by adsorption isotherm and surface tension measurement,while CO_(2) foams stability was quantified based on their foamability,foam stability,particle partitioning in the foams,and bubble sizes.Results show that direct contact of TX100 with nanosilica does altered the wettability of hydrophilic nanosilica surface,enable them to lengthen CO_(2) foams life at certain surfactant and nanoparticles concentrations.For 15 nm nanosilica,CO_(2) foam stability shows excellent performance at 0.1 and 0.5 wt%TX100 concentrations.As for 70 nm nanosilica,CO_(2) foam demonstrates longer lifetime at much lower TX100 concentration,0.01 wt%.Without the presence of TX100,CO_(2) foams exhibit undesirable lifetime performances for both nanosilica sizes.Nanosilica partitioning in CO_(2) foams structures demonstrate consistent relation with contact angle measurement.Estimated bubble sizes shows insignificant effect on CO_(2) foams life.With the assists of nanosilica and TX100,enhanced oil recovery via CO_(2) foam injection succeeds in increasing oil production by 13e22%of original oil-in-place(OOIP).
