浆态床合成气制二甲醚的宏观动力学研究

在甲醇合成与甲醇脱水催化剂比例为 5、催化剂浓度为 1 0 g/30 0ml液体石蜡、温度 2 50～ 2 80℃、压力 3～5MPa、气体空速 40 0 0～ 70 0 0ml/( g·h)条件下 ,建立了浆态床合成气制二甲醚宏观动力学模型 ;甲醇合成反应和甲醇脱水反应的活化能分别为 1 4 1kJ/mol和 2 3 5kJ/mol,甲醇摩生成速率的计算值与实验值的相对误差在 1 3 6%和2 2 %以内 ;动力学方程为r2D +M=k1 pCO1 954pH20 91 74/( 1 +KCOpCO1 50 1 +KCO2 pCO20 1 795) 2 2 60 ]、rD=k2 pM0 940 2 /( 1+KMpM1 739+KH2 OpH2 O2 2 4 3) 0 441 5]。

Macro-kinetics study for synthesis of dimethyl ether from syngas in slurry reactor

Synthesis of dimethyl ether in slurry reactor was operated under catalyst ratio(methanol synthesis catalyst/methanol dehydration catalyst)5,catalyst concentration 10g/300ml paraffins,250～280℃,3 0～5 0MPa,GHSV 4000～7000ml/(g·h),H 2/CO ratio2～4 and CO 2 content in syngas 1 2%～4 5%,and kinetics models are r 2D+M = k 1 p CO 1 954 p H 2 0 9174 /(1+ K CO p CO 1 501 + K CO 2 p CO 2 0 1795 ) 2 260 ]、 r D= k 2 p M 0 9402 /(1+ K M p M 1 739 + K H 2O p H 2O 2 243 ) 0 4415 ],where the activation energies of methanol synthesis reaction and methanol dehydration reaction are 14 1kJ/mol and 23 5kJ/mol,respectively The relative error of calculated results and experimental ones for methanol equivalent productivity was within 13 6% and for DEM productivity was about 22%