Fuel cell stacks as the automotive power source can be severely poisoned by a trace amount of NOx in atmosphere,which makes it necessary to provide clean air for fuel cell vehicles.In this work,activating commercial a...Fuel cell stacks as the automotive power source can be severely poisoned by a trace amount of NOx in atmosphere,which makes it necessary to provide clean air for fuel cell vehicles.In this work,activating commercial activated carbons with K2CO3 for the large enhancement of NO capture was studied.K2CO3 modified activated carbons(K2CO3 ACs)were prepared by impregnating activate carbons in K2CO3 solution under ultrasound treatment,followed by temperature programmed baking at 800 oC.The dynamic NO flow tests on K2CO3 ACs at room temperature indicated that NO adsorption capacity reached the maximum(96 mg/g)when K2CO3 loading was 19.5 wt%,which corresponded to a specific surface area of 1196.1 m2/g and total pore volume of 0.70 cm3/g.The ten-fold enhancement of NO adsorption on K2CO3 ACs compared to the unimpregnated activated carbon was mainly attributed to the formation of potassium nitrite,which was confirmed by FTIR and temperature programmed desorption measurements.Regeneration tests of NO adsorption on the optimum sample revealed that 76%of the NO adsorption capacity could be remained after the fourth cycle.展开更多
为解决配网对新能源承载力不足的问题,文中提出了一种考虑软开关(Soft Open Point,SOP)和负荷主动电压控制的联合规划模型和求解方法。建立应用于配电网规划的SOP数学模型,分别针对多项式形式和指数形式的负荷电压特性建立线性化模型。...为解决配网对新能源承载力不足的问题,文中提出了一种考虑软开关(Soft Open Point,SOP)和负荷主动电压控制的联合规划模型和求解方法。建立应用于配电网规划的SOP数学模型,分别针对多项式形式和指数形式的负荷电压特性建立线性化模型。以分布式新能源承载力、投资成本和运行成本为目标,建立有源配网两阶段随机二阶锥规划模型,对SOP、电容器组以及分布式新能源等设备的选址定容及其日内运行策略做出决策。考虑新能源、负荷和能源价格的不确定性,提出了基于K均值的场景聚类方法,提出了基于信赖域法的Benders分解算法来求解所提模型。通过改进51节点系统验证了所提模型的有效性和正确性,并分析了SOP与主动电压控制对新能源承载力的影响。展开更多
基金Project(2018YFB0105303)supported by the Ministry of Science and Technology of ChinaProject(17DZ1200702)supported by the Shanghai Science and Technology Committee,China
文摘Fuel cell stacks as the automotive power source can be severely poisoned by a trace amount of NOx in atmosphere,which makes it necessary to provide clean air for fuel cell vehicles.In this work,activating commercial activated carbons with K2CO3 for the large enhancement of NO capture was studied.K2CO3 modified activated carbons(K2CO3 ACs)were prepared by impregnating activate carbons in K2CO3 solution under ultrasound treatment,followed by temperature programmed baking at 800 oC.The dynamic NO flow tests on K2CO3 ACs at room temperature indicated that NO adsorption capacity reached the maximum(96 mg/g)when K2CO3 loading was 19.5 wt%,which corresponded to a specific surface area of 1196.1 m2/g and total pore volume of 0.70 cm3/g.The ten-fold enhancement of NO adsorption on K2CO3 ACs compared to the unimpregnated activated carbon was mainly attributed to the formation of potassium nitrite,which was confirmed by FTIR and temperature programmed desorption measurements.Regeneration tests of NO adsorption on the optimum sample revealed that 76%of the NO adsorption capacity could be remained after the fourth cycle.
文摘为解决配网对新能源承载力不足的问题,文中提出了一种考虑软开关(Soft Open Point,SOP)和负荷主动电压控制的联合规划模型和求解方法。建立应用于配电网规划的SOP数学模型,分别针对多项式形式和指数形式的负荷电压特性建立线性化模型。以分布式新能源承载力、投资成本和运行成本为目标,建立有源配网两阶段随机二阶锥规划模型,对SOP、电容器组以及分布式新能源等设备的选址定容及其日内运行策略做出决策。考虑新能源、负荷和能源价格的不确定性,提出了基于K均值的场景聚类方法,提出了基于信赖域法的Benders分解算法来求解所提模型。通过改进51节点系统验证了所提模型的有效性和正确性,并分析了SOP与主动电压控制对新能源承载力的影响。
