为了进一步降低固体氧化物燃料电池(solid oxide fuelcell,SOFC)复合系统回收CO2的能耗,该文提出一个新型的集成氧离子传输膜(oxygen ion transport membrane,OTM)的CO2零排放SOFC复合动力系统。利用单耗分析方法得到系统各单元的能耗...为了进一步降低固体氧化物燃料电池(solid oxide fuelcell,SOFC)复合系统回收CO2的能耗,该文提出一个新型的集成氧离子传输膜(oxygen ion transport membrane,OTM)的CO2零排放SOFC复合动力系统。利用单耗分析方法得到系统各单元的能耗分布情况,分析了SOFC的主要参数对整个系统性能的影响,并与集成传统深冷空分系统的零CO2排放SOFC复合动力系统进行了比较研究。研究结果表明:与不回收CO2的传统SOFC复合动力系统相比,与OTM集成的复合动力系统效率下降仅2.16个百分点,比与传统深冷空分系统集成的复合动力系统效率高0.74个百分点。该文研究成果可以为研究更高效的零排放复合动力系统提供有益的参考。展开更多
The initial stage of Ni-TiO2 composite system electrodeposition on glassy carbon electrode from an acidic solution of nickel sulfate was investigated using cyclic voltammetry （CV）, chronoamperometry （CA） and elect...The initial stage of Ni-TiO2 composite system electrodeposition on glassy carbon electrode from an acidic solution of nickel sulfate was investigated using cyclic voltammetry （CV）, chronoamperometry （CA） and electrochemical impedance spectroscopy （EIS）. Analysis of current density-time transients was performed using the nonlinear fitting procedure and electrochemical impedance spectroscopy was simulated by Z-view software. Besides, the surface morphology of Ni-TiO2 co-deposition at the initial stage was observed by scanning electron microscopy （SEM）. The results show that, in the case of low overpotential （-790 mV vs SCE）, the presence of TiO2 particles in the plating bath makes the nucleation relaxation time tm^x decreased clearly. Meanwhile, the electro-crystallization of Ni-TiO2 system follows a Scharifker-Hills （SH） progressive nucleation/growth mechanism. While in the case of higher overpotential, the presence of the TiO2 particles in solution makes the nucleation relaxation time tmax increased. At -850 mV （vs SCE）, the co-deposition of Ni-TiO2 system meets SH instantaneous nucleation/growth mechanism. The results of impedance spectra show that the appearance of the characteristic inductive loops represents the nucleation/growth of nickel and the presence of TiO2 particles reduces the charge transfer resistance of solution. The SEM observation confirms that TiO2 particles can be considered as favorable sites for nickel nucleating.展开更多
文摘为了进一步降低固体氧化物燃料电池(solid oxide fuelcell,SOFC)复合系统回收CO2的能耗,该文提出一个新型的集成氧离子传输膜(oxygen ion transport membrane,OTM)的CO2零排放SOFC复合动力系统。利用单耗分析方法得到系统各单元的能耗分布情况,分析了SOFC的主要参数对整个系统性能的影响,并与集成传统深冷空分系统的零CO2排放SOFC复合动力系统进行了比较研究。研究结果表明:与不回收CO2的传统SOFC复合动力系统相比,与OTM集成的复合动力系统效率下降仅2.16个百分点,比与传统深冷空分系统集成的复合动力系统效率高0.74个百分点。该文研究成果可以为研究更高效的零排放复合动力系统提供有益的参考。
基金Project(MKPT-04-106) supported by the Project of National Defense of China
文摘The initial stage of Ni-TiO2 composite system electrodeposition on glassy carbon electrode from an acidic solution of nickel sulfate was investigated using cyclic voltammetry （CV）, chronoamperometry （CA） and electrochemical impedance spectroscopy （EIS）. Analysis of current density-time transients was performed using the nonlinear fitting procedure and electrochemical impedance spectroscopy was simulated by Z-view software. Besides, the surface morphology of Ni-TiO2 co-deposition at the initial stage was observed by scanning electron microscopy （SEM）. The results show that, in the case of low overpotential （-790 mV vs SCE）, the presence of TiO2 particles in the plating bath makes the nucleation relaxation time tm^x decreased clearly. Meanwhile, the electro-crystallization of Ni-TiO2 system follows a Scharifker-Hills （SH） progressive nucleation/growth mechanism. While in the case of higher overpotential, the presence of the TiO2 particles in solution makes the nucleation relaxation time tmax increased. At -850 mV （vs SCE）, the co-deposition of Ni-TiO2 system meets SH instantaneous nucleation/growth mechanism. The results of impedance spectra show that the appearance of the characteristic inductive loops represents the nucleation/growth of nickel and the presence of TiO2 particles reduces the charge transfer resistance of solution. The SEM observation confirms that TiO2 particles can be considered as favorable sites for nickel nucleating.
