Benzene alkylation process is a typical catalytic reaction. When the reaction is carried out in gas phase or liquid phase, obvious catalyst deactivation is observed. This paper aims at slowing down catalyst deactivati...Benzene alkylation process is a typical catalytic reaction. When the reaction is carried out in gas phase or liquid phase, obvious catalyst deactivation is observed. This paper aims at slowing down catalyst deactivation of benzene alkylation reaction by taking advantage of some special properties of supercritical fluids (higher solubility than gases and higher diffusibility than liquids). The results indicate that when the reaction condition is above the critical point of the mixed reactants, the coke precursors (polynuclear aromatics) which directly deactivate catalyst can be removed by dissolution in the supercritical fluids, which leads to a longer catalyst life.展开更多
引入基于移动窗积分低通算法改进的FBD谐波电流检测方案,将其运用到三电平有源电力滤波器(active power filter,APF)中。用matlab对移动窗积分低通算法与二阶巴特沃斯(butterworth)低通滤波进行仿真对比:移动窗积分算法实现电导分量低...引入基于移动窗积分低通算法改进的FBD谐波电流检测方案,将其运用到三电平有源电力滤波器(active power filter,APF)中。用matlab对移动窗积分低通算法与二阶巴特沃斯(butterworth)低通滤波进行仿真对比:移动窗积分算法实现电导分量低通比截止频率为25Hz的二阶Butterworth的低通精度稍高,且其响应时间可降低到二阶Butterworth低通的一半以内。运用simulink对基于改进FBD谐波检测的三电平有源滤波器系统进行了建模仿真实验,对比分析得出:优越的动态响应性能及3.85%的稳态畸变率充分说明了应用方案的优越性与可行性。展开更多
文摘Benzene alkylation process is a typical catalytic reaction. When the reaction is carried out in gas phase or liquid phase, obvious catalyst deactivation is observed. This paper aims at slowing down catalyst deactivation of benzene alkylation reaction by taking advantage of some special properties of supercritical fluids (higher solubility than gases and higher diffusibility than liquids). The results indicate that when the reaction condition is above the critical point of the mixed reactants, the coke precursors (polynuclear aromatics) which directly deactivate catalyst can be removed by dissolution in the supercritical fluids, which leads to a longer catalyst life.
文摘引入基于移动窗积分低通算法改进的FBD谐波电流检测方案,将其运用到三电平有源电力滤波器(active power filter,APF)中。用matlab对移动窗积分低通算法与二阶巴特沃斯(butterworth)低通滤波进行仿真对比:移动窗积分算法实现电导分量低通比截止频率为25Hz的二阶Butterworth的低通精度稍高,且其响应时间可降低到二阶Butterworth低通的一半以内。运用simulink对基于改进FBD谐波检测的三电平有源滤波器系统进行了建模仿真实验,对比分析得出:优越的动态响应性能及3.85%的稳态畸变率充分说明了应用方案的优越性与可行性。
