炔醛法合成1,4-丁炔二醇浆态床反应器内流动-传质特性研究OA

Slurry bed reactors have been widely used in petrochemical and coal chemical industries due to their strong mixing performance,high catalytic efficiency,and good mass and heat transfer characteristics.How-ever,low swirl flow is often coupled in the production of 1,4-butynediol(BYD),and the effect of the low swirl flow on the fluid dynamics and mass transfer within the slurry bed needs further investigation.This work first studies the spatiotemporal distribution characteristics of bubbles within the slurry bed reactor coupled with low swirl flow.It is found that the low swirl flow significantly affects the motion trajectory of bubbles,promot-ing their circumferential and radial movement,thereby extending their residence time within the reactor.Low swirl flow also facilitates the breakup of bubbles,leading to a reduction in bubble size and an increase in bubble frequency within the reactor.Furthermore,low swirl flow increases the gas-liquid mass transfer area by break-ing up bubbles while simultaneously weakening the liquid-side mass transfer coefficient.As a result of the com-bined effects,the volumetric mass transfer coefficient decreases slightly with increasing the rotational speed.