In this paper, the relationship between ethanol conversion and C4 olefin selectivity and temperature under different catalyst combinations was analyzed. Under the given catalyst combination conditions at 350 ℃, the effects of reaction time on ethanol conversion and product selectivity were analyzed. According to the principle of grey correlation degree and the criterion of maximum and minimum closeness in fuzzy mathematics, the model of factors affecting ethanol conversion and C4 olefin selectivity is established. Through solving, the grey correlation degree and the maximum and minimum closeness of Co/SiO2 and HAP loading ratio, Co loading, ethanol concentration and temperature on ethanol conversion and C4 olefin selectivity is obtained. Due to the low accuracy, finally, the weight coefficients of the four influencing factors are obtained through iteration, which are 0.2813, 0.2188, 0.1563 and 0.3438 respectively. Based on fuzzy analytic hierarchy process and quaternion function optimization, the catalyst combination as 200mg:200mg Co/SiO2 and HAP loading ratio, 1wt% Co loading, 0.9ml/min ethanol concentration and the temperature as 400 ℃ can make the highest C4 olefin yield, up to 41.77%.When the temperature is lower than 350 ℃, selecting the catalyst combination as 200mg:200mg Co/SiO2 and HAP loading ratio, 2wt% Co loading, 1.68ml/min ethanol concentration and the temperature as 350 ℃ can make the C4 olefin yield the highest, up to 26.54%.

Jun Guo, Yonghui Zou. Preparation of C4 Olefins by Ethanol Coupling Based on Fuzzy Analytic Hierarchy Process. Academic Journal of Engineering and Technology Science (2022) Vol. 5, Issue 1: 45-48. https://doi.org/10.25236/AJETS.2022.050109.

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