为优化SO^2-₄/ZrO₂-CeO₂-杭锦2^#土(SZCe-HJ)催化大豆油制取生物柴油的工艺,基于中心复合(Central Composite Design,CCD)试验设计方法,以反应温度(X₁)、醇油摩尔比(X₂)、催化剂质量分数(X₃)、反应时间(X₄)为自变量及生物柴油产率(Y)为响应值进行优化试验。将试验数据拟合建立了数学模型,该模型能够较准确地预测SZCe-HJ催化大豆油制取生物柴油的产率。结果表明,在反应温度为178℃、醇油摩尔比为30:1、催化剂质量分数为3.06%、反应时间为6 h优化工艺条件下,生物柴油平均产率最高为62.92%。经气相色谱定量分析,生物柴油中脂肪酸甲酯质量分数达到95.18%,符合使用标准。

In order to optimize the process that producing biodiesel from soybean oil catalyzed by SZCe-HJ,a series of experiments are carried out,based on Central Composite Design method,through taking reaction temperature (X₁),alcohol oil molar ratio (X₂),catalyst dosage (X₃) and reaction time (X₄) as independent variables,and the biodiesel yield (Y) as a response value.A mathematical model is established by fitting the experimental data with Design Expert software.The model can accurately predict the conversion rate of soybean oil to biodiesel over SZCe-HJ catalyst.Results show that the yield of biodiesel is up to 62.92% under the optimal reaction conditions that temperature is 178℃,the molar ratio of methanol to oil is 30:1,catalyst dosage is 3.06%,and reaction performs for 6 h.It is shown through gas chromatography quantitative analysis that the content of fatty acid methyl ester in biodiesel produced reaches 95.18%,which is in line with the standard.

丁立军(1978-),男,博士,副教授,主要从事生物质能源方面的研究,dlj78@163.com。