S. Chowdhury, D. Kunzru
Dec 1, 1993
Citations
0
Influential Citations
7
Citations
Journal
Canadian Journal of Chemical Engineering
Abstract
The effectiveness of benzyl diethyl phosphite as a coke inhibitor during naphtha pyrolysis was investigated in a tubular reactor at 1073 K and atmospheric pressure. Significant reduction in the coking rate was achieved by adding benzyl diethyl phosphite to the feed. The effect of toluene, methylcyclohexane, l-octene and carbon disulfide on the rate of coke formation was also investigated. Toluene enhanced the rate of coke formation significantly, whereas with methylcyclohexane and l-octene the increase was less appreciable. Carbon disulphide decreased the amount of coke deposited initially, but with increasing run time the asymptotic coking rates were found to be higher than for straight-run naphtha. The yields of propylene, 1,3-butadiene and butenes increased on addition of carbon disulphide. On a etudie l'efficacite du benzyl diethyle phosphite comme inhibiteur de coke lors de la pyrolyse de naphta dans un reacteur tubulaire a 1073 K et a la pression atmospherique. Une reduction significative de la vitesse de cokefaction a ete obtenue par l'ajout de benzyl diethyle phosphite a l'alimentation. L'effet du toluene, du methylcyclohexane, du l-octene et du bisulfure de carbone sur la vitesse de formation du coke a egalement ete etudie. Le toluene augmente nettement la vitesse de formation du coke alors qu'avec le methylcyclohexane et le l-octene l'augmentation est moins appreciable. Le bisulfure de carbone diminue la quantite de coke deposee initialement, mais lorsque les temps d'essais sont augmentes, on a trouve que les vitesses de cokefaction asymptotiques etaient plus elevees que pour le naphta de distillation directe. Les rendements en propylene, en 1,3-butadiene et en butene augmentent avec l'ajout de bisulfure de carbone.