合成甲醇反应器流向变换强制周期操作特性

UNSTEADY-STATE METHANOL SYNTHESIS IN FIXED BED REACTOR OPERATING UNDER FLOW REVERSAL MODE

实验研究了合成甲醇固定床反应器流向变换强制周期操作的非定态特性 ,考查了流向变换周期、进料流速和进料组成对床层轴向温度分布、热波在床层内的爬行速度以及反应器流出物组成的影响 .研究发现 ,即使进料中∑COx 总浓度降低至 0 .33 % (mol) 。

Unsteady-state performance of a fixed bed reactor for methanol synthesis, operating under flow reversal mode, was experimentally studied. The effects of various factors, such as feed gas velocity, feed composition and cycle duration on the transient axial temperature profile in the bed, propagation velocity of thermal wave, transient composition of tail gas and time-averaged methanol output were investigated at a pressure of 2.0 MPa, gas velocity about 0.20-0.50 m&middots-1, cycle duration of 20-120 min and total concentration of carbon oxides, ΣCOx, 0.33%-7.32% mol. Higher conversion of ΣCOx than that of steady-state operation was achieved even though for a very low concentration of ΣCOx down to 0.33% mol.