Design and research on preparation of C4 olefins by ethanol coupling based on logistic

Abstract

With the shortage of fossil energy and the aggravation of environmental pollution, it is urgent to develop new energy sources. The preparation of C4 olefins from ethanol has great application prospects and economic benefits. In this paper, for the coupling preparation of C4 olefins with ethanol, relevant experiments are designed under different catalysts and temperatures to study the relationship between ethanol conversion, C4 olefins selectivity and temperature, and to explore the effects of different catalyst combinations and temperatures on ethanol conversion and C4 olefins selectivity. According to the experimental data, using logistic model and neural network model, different catalyst combinations are classified and discussed. With the change of temperature, ethanol conversion and C4 olefins selectivity showed an S-type growth. When the selectivity of C4 olefins reaches saturation, the ethanol conversion will tend to be stable and other products will increase. Without limiting the temperature, it was found that group A3 catalyst reached C4 olefins yield of 0.458 at 410 °C. Under the limited temperature, group A2 catalyst had the optimal C4 olefins yield of 0.26.