【摘要】 研究微波辐射法制备固体碱催化剂CaO/NaY在合成生物柴油中的应用。结果表明,该催化剂在醇油摩尔比9∶1,催化剂质量分数3%,反应温度65℃,反应时间3 h等条件下,以精制大豆油为原料制备的生物柴油得率可达95%;而以酸值(以KOH计)为4 mg/g和含水质量分数为1.5%的油脂为原料,生物柴油得率可分别达到92.4%和84.8%。催化剂结构表征表明:微波辐射改善了CaO在载体NaY上的分散,其总碱量(H-27)达到3.798mmol/g,是一种固体超强碱。更多还原

【Abstract】 With molecular sieve NaY as carrier,supported solid base CaO/NaY was prepared by microwave irradiation,and the transesterification of soybean oil and methanol to produce biodiesel was investigated with the catalyst.The results show that the yield of biodiesel can be about 95% under the conditions when molar ratio of methanol to soybean oil is 9 ∶1,catalyst mass fraction is 3%,reaction temperature is 65 ℃ and reaction time is 3 h.The CaO/NaY catalyst is more tolerant to free fatty acids and water,and the yield is 92.4% and 84.8% respectively when acid value(as KOH) is 4 mg/g and water mass fraction is 1.5%.Moreover,X-ray diffraction(XRD) analysis shows that CaO is well dispersed in NaY after microwave irradiation,and CaO/NaY is a kind of solid super base with total basicity of 3.798 mmol/g(H-≥27).更多还原