Study on the Preparation of C4 Alkenes by Ethanol Coupling Based on Bootstrap Method

The manufacture of C4 olefins via ethanol coupling was investigated in this work [1]. The Bootstrap method of statistics was used to obtain the accurate relationship between the ethanol conversion and C4 olefins selectivity and temperature and time. First, analyze the relevant data [8], where the amount of data is too small and discrete individuals. In order to better fit ethanol conversion and C4 olefins selectivity at linear temperatures, Bootstrap method was used for statistics and self-iterative method system was used to make the fitting data closer to the real data. A visual analysis of the fitted large data set was performed to obtain the relationship between the ethanol conversion rate and temperature and the relationship between the selectivity of C4 olefins and temperature in each catalyst type. And verify the results to check the goodness of fit of the equation. When T = 350℃, the change of C4 olefins selectivity within \(\mathit{min}\in [\mathrm{20,273}]\) was investigated [3]. By resampling, the resulting discrete data approximates the linear variation in the response. A large number of data are fitted into a continuous curve, and the relationship between C4 olefins selectivity and time can be known after analysis [4]. That is, the conversion rate of ethanol decreased significantly with time, from 43.5% in 20 min to 29.9% in 273 min. However, the selectivity of ethylene, C4 olefins, methyl benzaldehyde and methylbenzyl alcohol hardly changed over time [12].