气液固相催化合成甲醇本征动力学

INTRINSIC KINETICS OF GAS-LIQUID-SOLID PHASE CATALYTIC SYNTHESIS OF METHANOL

研究了以液体石蜡为液相介质在铜基催化剂上由CO、CO_2与氢气合成甲醇的本征动力学,按CO和CO_2加氢生成甲醇的反应途径,提出了反应机理,建立了6种动力学模型,经参数估值及模型筛选,得出了最终模型,该模型的计算值与实验值吻合很好,对CO及CO_2转化速率的平均偏差分别为3.69%和3.92%。

The intrinsic kinetics of methanol synthesis in the gas - liquid - solid phase process , starting from carbon monoxide, carbon dioxide and hydrogen over a copper - based catalyst suspended in paraffin as the liquid medium, were studied in a well - mixed, agitated slurry reactor at T = 210-250℃ and p= 3-8 MPa. The results obtained show that methanol can be formed from both carbon monoxide and carbon dioxide hydrogenation reactions. Based on these two reactions a dual -site Langmuir -Hinshelwood mechanism was proposed, and 6 kinetic rate models were derived. After parameter estimation and model discrimination, a final model which gave a good agreement with the experimental results was obtained. The average relative deviations between experimental and calculated conversion rates are 3. 69% and 3. 92% for CO and CO2 respectively.