CAJ | 학술논문

采用半经验的乙醇脱水制乙烯反应动力学模型,建立了乙醇脱水制乙烯等温固定床反应器的一维模型.利用工业生产数据对所建模型进行了验正,反应器出口温度、乙醇转化率、乙烯选择性的计算值与实际值的偏差分别是-1.65 K,-0.66%,0.43%.采用该模型模拟了加热介质温度、进料空速、乙醇含量对反应器轴向温度分布、乙醇转化率和乙烯选择性的影响.模拟结果表明,加热介质温度在643-683 K内可得到较好的反应器轴向温度分布和乙醇脱水反应结果;适宜的进料空速为0.6 h~(-1),进料空速过高乙醇转化率降低;乙醇含量高有利于提高乙烯的选择性.
채용반경험적을순탈수제을희반응동역학모형,건립료을순탈수제을희등온고정상반응기적일유모형.이용공업생산수거대소건모형진행료험정,반응기출구온도、을순전화솔、을희선택성적계산치여실제치적편차분별시-1.65 K,-0.66%,0.43%.채용해모형모의료가열개질온도、진료공속、을순함량대반응기축향온도분포、을순전화솔화을희선택성적영향.모의결과표명,가열개질온도재643-683 K내가득도교호적반응기축향온도분포화을순탈수반응결과;괄의적진료공속위0.6 h~(-1),진료공속과고을순전화솔강저;을순함량고유리우제고을희적선택성.
Based on semi empirical kinetic model of ethanol dehydration to ethylene on γ Al_2O_3 catalyst, a one dimensional mathematical model of isothermal fixed bed reactor for ethanol dehydration to ethylene was established. Using industrial production data to verify the model, the deviations of calculated values of reactor outlet temperature, ethanol conversion and ethylene selectivity from the actual data of the plant were -1.65 K, -0.66% and 0.43%, respectively. Effects of heating medium temperature, feed space velocity and reactant concentrations in feed on axial temperature distribution in catalyst bed, conversions of ethanol, selectivity to ethylene were simulated. When heating medium temperature is controlled in range of 643-683 K, appropriate axial temperature distribution and better reaction results can be obtained. Appropriate feed hourly space velocity is about 0.6 h~(-1). Higher hourly space will lead to lower conversion of ethanol. Higher content of ethanol in feed is favorable to ethylene selectivity and volume fraction of 95% is appropriate.