Two liquid crystal monomers,cholesteryl 10\|undecylenate (M1), and cholesteryl 4\|(10\|undecylenoyloxy)\|benzoate(M2),and their respective side\|chain liquid crystal homopolymers (P1,P2) were synthesized.Their liquid ...Two liquid crystal monomers,cholesteryl 10\|undecylenate (M1), and cholesteryl 4\|(10\|undecylenoyloxy)\|benzoate(M2),and their respective side\|chain liquid crystal homopolymers (P1,P2) were synthesized.Their liquid crystal properties were characterized by POM and DSC method.M1 could form sematic liquid crystal and cholesteric liquid crystal,while M2\|only cholesteric liquid crystal.The Polymers,P1 and P2,exhibited sematic liquid crystal behavior.The results also indicated that,because of the structure of 1,4\|COO\|Ar\|COO\|in M2 and P2,the isotropization tempretures of the liquid crystalline M2 and P2 were higher than those of M1 and P1,respectively,and the temprature range of LC phases of M2 was also wider than that of M1.Homopolymer P1,was applied in the capillary column gas chromatography as a novel stationary phase and showed ideal separating selectivity.A mixture of anthracene,phenanthrene and acenaphene and a mixture of dichlorobenzene isomers were well separated.展开更多
浮式生产储存船(Floating Production Storage and Offloading,FPSO)与运输船进行旁靠作业时,存在两船体的运动与液舱晃荡的耦合效应.文中基于法国船级社(BV)的三维线性频域水动力分析软件Hydro STAR,首先对一艘FPSO进行了波浪中的运动...浮式生产储存船(Floating Production Storage and Offloading,FPSO)与运输船进行旁靠作业时,存在两船体的运动与液舱晃荡的耦合效应.文中基于法国船级社(BV)的三维线性频域水动力分析软件Hydro STAR,首先对一艘FPSO进行了波浪中的运动响应计算,通过与试验结果对比,验证了数值模型和计算方法的有效性.然后计算分析了液舱不同载液率及FPSO与运输船旁靠这两个因素对耦合运动响应的影响.结果表明:旁靠时两者间存在遮蔽效应,且FPSO和运输船的液舱载液率对彼此的运动响应均具有一定影响.展开更多
The hydrodynamics and mass transfer characteristics of a lab-scale jet bubbling reactor(JBR)including the gas holdup,volumetric mass transfer coefficient and specific interfacial area were assessed experimentally inve...The hydrodynamics and mass transfer characteristics of a lab-scale jet bubbling reactor(JBR)including the gas holdup,volumetric mass transfer coefficient and specific interfacial area were assessed experimentally investigating the influence of temperature,pH and superficial gas velocity.The reactor diameter and height were 11 and 30 cm,respectively.It was equipped with a single sparger,operating at atmospheric pressure,20 and 40℃,and two pH values of 3 and 6.The height of the liquid was 23 cm,while the superficial gas velocity changed within 0.010-0.040 m·s^(-1)range.Experiments were conducted with pure oxygen as the gas phase and saturated lime solution as the liquid phase.The liquid-side volumetric mass transfer coefficient was determined under unsteady-state oxygen absorption in a saturated lime solution.The gas holdup was calculated based on the liquid height change,while the specific interfacial area was obtained by a physical method based on the bubble size distribution(BSD)in different superficial gas velocities.The results indicated that at the same temperature but different pH,the gas holdup variation was negligible,while the liquid-side volumetric mass transfer coefficient at the pH value of 6 was higher than that at the pH=3.At a constant pH but different temperatures,the gas holdup and the liquid-side volumetric mass transfer coefficients at 40℃were higher than that of the same at 20℃.A reasonable and appropriate estimation of the liquid-side volumetric mass transfer coefficient(kla)in a pilot-scale JBR was provided which can be applied to the design and scale-up of JBRs.展开更多
文摘Two liquid crystal monomers,cholesteryl 10\|undecylenate (M1), and cholesteryl 4\|(10\|undecylenoyloxy)\|benzoate(M2),and their respective side\|chain liquid crystal homopolymers (P1,P2) were synthesized.Their liquid crystal properties were characterized by POM and DSC method.M1 could form sematic liquid crystal and cholesteric liquid crystal,while M2\|only cholesteric liquid crystal.The Polymers,P1 and P2,exhibited sematic liquid crystal behavior.The results also indicated that,because of the structure of 1,4\|COO\|Ar\|COO\|in M2 and P2,the isotropization tempretures of the liquid crystalline M2 and P2 were higher than those of M1 and P1,respectively,and the temprature range of LC phases of M2 was also wider than that of M1.Homopolymer P1,was applied in the capillary column gas chromatography as a novel stationary phase and showed ideal separating selectivity.A mixture of anthracene,phenanthrene and acenaphene and a mixture of dichlorobenzene isomers were well separated.
文摘浮式生产储存船(Floating Production Storage and Offloading,FPSO)与运输船进行旁靠作业时,存在两船体的运动与液舱晃荡的耦合效应.文中基于法国船级社(BV)的三维线性频域水动力分析软件Hydro STAR,首先对一艘FPSO进行了波浪中的运动响应计算,通过与试验结果对比,验证了数值模型和计算方法的有效性.然后计算分析了液舱不同载液率及FPSO与运输船旁靠这两个因素对耦合运动响应的影响.结果表明:旁靠时两者间存在遮蔽效应,且FPSO和运输船的液舱载液率对彼此的运动响应均具有一定影响.
基金the authors appreciate the vice-chancellor of research and technology of the University of Isfahan for supporting this work under Grant No.911401707。
文摘The hydrodynamics and mass transfer characteristics of a lab-scale jet bubbling reactor(JBR)including the gas holdup,volumetric mass transfer coefficient and specific interfacial area were assessed experimentally investigating the influence of temperature,pH and superficial gas velocity.The reactor diameter and height were 11 and 30 cm,respectively.It was equipped with a single sparger,operating at atmospheric pressure,20 and 40℃,and two pH values of 3 and 6.The height of the liquid was 23 cm,while the superficial gas velocity changed within 0.010-0.040 m·s^(-1)range.Experiments were conducted with pure oxygen as the gas phase and saturated lime solution as the liquid phase.The liquid-side volumetric mass transfer coefficient was determined under unsteady-state oxygen absorption in a saturated lime solution.The gas holdup was calculated based on the liquid height change,while the specific interfacial area was obtained by a physical method based on the bubble size distribution(BSD)in different superficial gas velocities.The results indicated that at the same temperature but different pH,the gas holdup variation was negligible,while the liquid-side volumetric mass transfer coefficient at the pH value of 6 was higher than that at the pH=3.At a constant pH but different temperatures,the gas holdup and the liquid-side volumetric mass transfer coefficients at 40℃were higher than that of the same at 20℃.A reasonable and appropriate estimation of the liquid-side volumetric mass transfer coefficient(kla)in a pilot-scale JBR was provided which can be applied to the design and scale-up of JBRs.
