Destructive tests of the catalyst was carried out to study the effect oftemperature on the catalytic activity of CO coupling to diethyl oxalate (DEO) over a Pd-Fe/Al_2O_3catalyst. It was found that a temperature jump ...Destructive tests of the catalyst was carried out to study the effect oftemperature on the catalytic activity of CO coupling to diethyl oxalate (DEO) over a Pd-Fe/Al_2O_3catalyst. It was found that a temperature jump could cause the deactivation of the Pd-Fe/α-Al_2O_3catalyst. The catalyst deactivated at different temperatures has different characteristics. Afterdeactivation the crystal structure of α-Al_2O_3 did not change, but the Pd particle size wasenlarged. Most of the Pd^0 were oxidized to Pd^(2+), and Fe^(2+) was oxidized to Fe^(3+) on thesurface of the deactivated catalyst. The catalyst could be regenerated, but its original activitycould not be recovered completely.展开更多
选取草酸二乙酯(DEO)、碳酸二乙酯(DEC)的合成与亚硝酸乙酯(EN)的分解反应为独立反应,以亚硝酸乙酯、草酸二乙酯和碳酸二乙酯为关键组分,建立管壳式固定床草酸二乙酯合成反应器的一维拟均相模型并进行数学模拟,获得反应器管内轴向上的...选取草酸二乙酯(DEO)、碳酸二乙酯(DEC)的合成与亚硝酸乙酯(EN)的分解反应为独立反应,以亚硝酸乙酯、草酸二乙酯和碳酸二乙酯为关键组分,建立管壳式固定床草酸二乙酯合成反应器的一维拟均相模型并进行数学模拟,获得反应器管内轴向上的反应参数分布及不同操作条件对草酸二乙酯合成的影响.模拟计算结果显示。换热介质的温度和原料气中惰性气体的含量对 DEO 合成反应器的热点影响明显,原料气进口温度、进口气量对反应结果影响不显著,原料中 CO 与 EN 比确定为1.5～2较合理。展开更多
基金Supported by National"Ninth-Five" Scientific Research Project(Grant number:96-539-01)
文摘Destructive tests of the catalyst was carried out to study the effect oftemperature on the catalytic activity of CO coupling to diethyl oxalate (DEO) over a Pd-Fe/Al_2O_3catalyst. It was found that a temperature jump could cause the deactivation of the Pd-Fe/α-Al_2O_3catalyst. The catalyst deactivated at different temperatures has different characteristics. Afterdeactivation the crystal structure of α-Al_2O_3 did not change, but the Pd particle size wasenlarged. Most of the Pd^0 were oxidized to Pd^(2+), and Fe^(2+) was oxidized to Fe^(3+) on thesurface of the deactivated catalyst. The catalyst could be regenerated, but its original activitycould not be recovered completely.
文摘选取草酸二乙酯(DEO)、碳酸二乙酯(DEC)的合成与亚硝酸乙酯(EN)的分解反应为独立反应,以亚硝酸乙酯、草酸二乙酯和碳酸二乙酯为关键组分,建立管壳式固定床草酸二乙酯合成反应器的一维拟均相模型并进行数学模拟,获得反应器管内轴向上的反应参数分布及不同操作条件对草酸二乙酯合成的影响.模拟计算结果显示。换热介质的温度和原料气中惰性气体的含量对 DEO 合成反应器的热点影响明显,原料气进口温度、进口气量对反应结果影响不显著,原料中 CO 与 EN 比确定为1.5～2较合理。
