费托合成双α模型与产物预测

Double alpha model of Fischer-Tropsch synthesis and prediction of products

针对费托合成预测模型不能适应较宽条件范围和预测精度低等问题,构建了费托合成产物链增长因子α关于温度、空速和H_2与CO分压比的三元双α模型来预测α值,同时关联幂函数动力学模型对产物分布进行预测,通过预测值与文献值对比验证模型准确性。结果表明:在较宽的操作条件范围内三元双α模型可以更准确预测费托合成产物两段分布的α值,误差基本小于±10%;该模型同样适用于Fe-Mn和Co-Ru催化剂;费托合成产物的预测值与文献值能很好地吻合,相对残差基本在±15%范围内。三元双α模型在适用范围和预测精度上得到了提高。

A ternary double a model of Fischer-Tropsch Synthesis products chain growth factor a for temperature, space velocity and H2 and CO partial pressure ratios was constructed to predict the a. It was aiming at solving the problem that the prediction model of Fischer-Tropsch Synthesis can not adapt to a wide range of operating conditions and the prediction accuracy is low. The power function kinetic model was correlated to predict the product distribution. And the accuracy of the model was verified by comparing the predicted values with the literature values. The results show that the α of two-stage product distribution of Fischer-Tropsch Synthesis can be accurately predicted by the model with an error of less than ± 10% under a wide range of operating conditions. The model applies to Fe-Mn and Co-Ru catalysts. The predicted values of the Fischer-Tropsch Synthesis products are fit well with the literature values and the relative residuals are within ±15%. That is, the application conditions and prediction accuracy of the model are improved.