Ruthenium loaded on activated carbon pre-treated by HNO3 was used to catalyze the reaction of 1-(2-Aminoethyl)-2-imidazolidone (AEI) synthesized from ethylenediamine, ethanolamine and CO2. Response surface methodology...Ruthenium loaded on activated carbon pre-treated by HNO3 was used to catalyze the reaction of 1-(2-Aminoethyl)-2-imidazolidone (AEI) synthesized from ethylenediamine, ethanolamine and CO2. Response surface methodology (RSM) based on Box-Behnken design (BBD) was employed to optimize the synthesis of AEI. The statistical analysis results showed that the yield of AEI was significantly affected by the CO2 pressure, reaction temperature and reaction time. According to the results of variance analysis, the value of the determination coefficient of 0.9854 was in reasonable agreement with the “Adj R-Squared” of 0.9666, which means this model can predict the yield of AEI well and can be used to optimize reaction conditions for higher AEI yield. The optimal values of AEI yield predicted by RSM was 84.9% under temperature 206.51?C, CO2 pressure 9.35 Mpa, reaction time 10.11 h, and the verification experiment yield of AEI was 83.1%.展开更多
以乙二胺、乙醇胺和CO2为原料,Ru/Al2O3为催化剂,水为溶剂一步法合成1-(2-氨乙基)-2-咪唑烷酮(AEI)。通过单因素实验和正交实验考察了反应温度、反应时间、CO2压力、溶剂水用量和催化剂负载量等反应条件对乙二胺转化率和AEI收率的影响,...以乙二胺、乙醇胺和CO2为原料,Ru/Al2O3为催化剂,水为溶剂一步法合成1-(2-氨乙基)-2-咪唑烷酮(AEI)。通过单因素实验和正交实验考察了反应温度、反应时间、CO2压力、溶剂水用量和催化剂负载量等反应条件对乙二胺转化率和AEI收率的影响,分析了CO2在AEI合成过程中的作用机理。实验结果表明,在反应温度220℃、CO2压力8 MPa、反应时间10 h、负载1%(w)Ru/Al2O3催化剂和溶剂水7 m L条件下,AEI收率可达70.25%;增加CO2压力有利于提高乙二胺转化率和中间产物2-咪唑烷酮的生成,但CO2压力的增加增强了CO2与2-咪唑烷酮上氨基的作用,阻碍了氨基和乙醇胺上羟基脱水生成AEI,降低了AEI收率。展开更多
文摘Ruthenium loaded on activated carbon pre-treated by HNO3 was used to catalyze the reaction of 1-(2-Aminoethyl)-2-imidazolidone (AEI) synthesized from ethylenediamine, ethanolamine and CO2. Response surface methodology (RSM) based on Box-Behnken design (BBD) was employed to optimize the synthesis of AEI. The statistical analysis results showed that the yield of AEI was significantly affected by the CO2 pressure, reaction temperature and reaction time. According to the results of variance analysis, the value of the determination coefficient of 0.9854 was in reasonable agreement with the “Adj R-Squared” of 0.9666, which means this model can predict the yield of AEI well and can be used to optimize reaction conditions for higher AEI yield. The optimal values of AEI yield predicted by RSM was 84.9% under temperature 206.51?C, CO2 pressure 9.35 Mpa, reaction time 10.11 h, and the verification experiment yield of AEI was 83.1%.
文摘以乙二胺、乙醇胺和CO2为原料,Ru/Al2O3为催化剂,水为溶剂一步法合成1-(2-氨乙基)-2-咪唑烷酮(AEI)。通过单因素实验和正交实验考察了反应温度、反应时间、CO2压力、溶剂水用量和催化剂负载量等反应条件对乙二胺转化率和AEI收率的影响,分析了CO2在AEI合成过程中的作用机理。实验结果表明,在反应温度220℃、CO2压力8 MPa、反应时间10 h、负载1%(w)Ru/Al2O3催化剂和溶剂水7 m L条件下,AEI收率可达70.25%;增加CO2压力有利于提高乙二胺转化率和中间产物2-咪唑烷酮的生成,但CO2压力的增加增强了CO2与2-咪唑烷酮上氨基的作用,阻碍了氨基和乙醇胺上羟基脱水生成AEI,降低了AEI收率。
