东南大学能源与环境学院,南京,210096
网络首发:2011-07-10,
纸质出版:2011
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郑爱军, 仲兆平, 戴佳佳, 等. 生物油催化酯化过程中乙酸转化率的智能预测[J]. 西安交通大学学报, 2011,45(7):118-122.
Intelligent Prediction of Conversion Rate of Acetic Acid in Catalytic Esterification Process of Bio-Oil[J]. 2011, 45(7): 118-122.
以生物油乙酸转化率为提质指标
选用固体超强酸SO
4
2-
/SiO
2
-TiO
2
对生物油催化酯化进行了实验研究.考察了不同的实验条件
即反应温度、酸醇量比、催化剂用量等对酯化反应的影响
在实验的基础上
运用最小二乘支持向量机建立乙酸转化率智能预测模型
并选用自适应粒子群优化算法对最小二乘支持向量机进行了参数优化.实验结果表明
最佳的生物油酯化工况为反应温度80 ℃、酸醇量比1.6和催化剂用量为7.5%.通过15个检测样本的检验
发现最小二乘支持向量机预测的平均相对误差能够降低到9.7%
其性能优于常用的BP神经网络与RBF神经网络
最小二乘支持向量机法更适合于预测生物油酯化过程中乙酸的转化率.
Experiments were conducted to study the catalytic esterification of acetic acid which was regarded as the model compound of bio-oil. The solid super-acid
SO
4
2-
/SiO
2
-TiO
2
was selected as the catalyst and the conversion rate of acetic acid was viewed as the evaluating indicator. The effects of various factors like temperature
the mass ratio of ethanol to acetic acid
and the catalyst amount were examined. On the basis of experimental data
the least square support vector machine was applied to build a model of the intelligent prediction of the conversion rate of acetic acid
and the adaptive particle swarm algorithm was used to optimize the parameters in the least square support vector machine. The results indicate that the optimal catalytic esterification of bio-oil would opera
te at the temperature of 80 ℃
the mass ratio of ethanol to acetic acid of 1.6
and the catalyst content of 7.5%. By the examination of 15 testing samples
the prediction error(absolute average relative error)of the least square support vector machine decreases to 9.7%
showing that the least square support vector machine is more suitable for predicting the conversion rate of acetic acid during the catalytic esterification process of bio-oil than the conventional BP or RBF neural network.
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