利用响应面法对红花油的乙醇解反应进行了优化研究.采用3因素3水平的中心组合设计研究了反应时间、醇油摩尔比、催化剂用量(氢氧化钠/红花油)诸因素共同作用对脂肪酸乙酯含量(质量分数)的影响.优化后的条件为:反应时间50 m in、醇油摩尔...利用响应面法对红花油的乙醇解反应进行了优化研究.采用3因素3水平的中心组合设计研究了反应时间、醇油摩尔比、催化剂用量(氢氧化钠/红花油)诸因素共同作用对脂肪酸乙酯含量(质量分数)的影响.优化后的条件为:反应时间50 m in、醇油摩尔比7.0∶1、催化剂用量0.7%(相对于油脂质量),在此条件下乙酯含量可以达到95.1%.展开更多
Contrast degradation experiments between ethanol and polyvinyl alcohol (PVA) were conducted during H2O2, UV/H2O2, Fenton, and Photo-Fenton processes in this study. UV/VIS spectra showed' that complexes between Fe(...Contrast degradation experiments between ethanol and polyvinyl alcohol (PVA) were conducted during H2O2, UV/H2O2, Fenton, and Photo-Fenton processes in this study. UV/VIS spectra showed' that complexes between Fe(Ⅲ) and organics were easily formed and degraded within reaction time. Compared with ,the degradation of complex, hydroxyl radicals acted weakly in Fenton or Photo-Fenton process. Hydroxyl radi'cals involved in Photo-Fenton process were deemed to be generated from the split decomposition of H2O2, photolysis of Fe_aq^3+, and degradation of hydrated Fe(Ⅳ)-complex but not traditional Fenton reaction. Experimental evidence to support this point was presented in this paper.展开更多
文摘利用响应面法对红花油的乙醇解反应进行了优化研究.采用3因素3水平的中心组合设计研究了反应时间、醇油摩尔比、催化剂用量(氢氧化钠/红花油)诸因素共同作用对脂肪酸乙酯含量(质量分数)的影响.优化后的条件为:反应时间50 m in、醇油摩尔比7.0∶1、催化剂用量0.7%(相对于油脂质量),在此条件下乙酯含量可以达到95.1%.
基金National Natural Science Foundation of China(No.20176053)
文摘Contrast degradation experiments between ethanol and polyvinyl alcohol (PVA) were conducted during H2O2, UV/H2O2, Fenton, and Photo-Fenton processes in this study. UV/VIS spectra showed' that complexes between Fe(Ⅲ) and organics were easily formed and degraded within reaction time. Compared with ,the degradation of complex, hydroxyl radicals acted weakly in Fenton or Photo-Fenton process. Hydroxyl radi'cals involved in Photo-Fenton process were deemed to be generated from the split decomposition of H2O2, photolysis of Fe_aq^3+, and degradation of hydrated Fe(Ⅳ)-complex but not traditional Fenton reaction. Experimental evidence to support this point was presented in this paper.
