Olefins are mainly derived from petroleum and are important raw materials in the petrochemical industry. In this paper, the combination of catalysts for the preparation of C4 olefins by catalytic coupling of ethanol was analyzed. First of all, under each combination of catalysts, the relationship between the conversion of ethanol at different temperatures, the selectivity of alkenes and temperature was studied. Because the change of temperature is equal, but the change of ethanol conversion is not equal to that of olefin selectivity, so the relationship between them and temperature must be non-linear. Because the value of temperature is large, the conversion of ethanol and C4 olefin is relatively small, so calculating the logarithm of temperature can eliminate the influence of heteroscedasticity on the one hand, and it is easy to find a suitable fitting function on the other hand. Then the equation is established, the goodness of fit is 0.99, and the model is established. Then, with the change of time, there is an obvious first-order function relationship between ethanol conversion, acetaldehyde selectivity, ethylene selectivity and time, ethanol conversion is negatively correlated with time, acetaldehyde selectivity and ethylene selectivity are positively correlated with time. In addition, we use correlation analysis, factor analysis and other statistical methods to analyze different reaction products to find the correlation between them.

Yifei Wang. Study on the process of preparing C4 olefin from ethanol based on optimal method. Academic Journal of Engineering and Technology Science (2021) Vol. 4, Issue 7: 12-16. https://doi.org/10.25236/AJETS.2021.040703.

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