Journal of Applied Sciences1812-56541812-5662Asian Network for Scientific Information10.3923/jas.2007.3786.3790HamzehYahya IzadyarSoheila MorthaGerard 122007723Based on the known mechanisms of lignin degradation by ClO2, it has been shown that in conventional ECF delignification stage a significant part of applied chlorine dioxide is consumed in secondary reactions without significant effect on beaching. This problem contributed to the principle of a typical batch reactor used for pulp bleaching in which primary reaction products can easily react with ClO2. In this study the strategy of pulp delignification in flow through reactor used to limit secondary reactions. The main feature of this reactor is its capability to removes the primary reaction products from the reaction zone by displacement flow. The obtained results showed that the global ClO2 efficiency in flow through reactor depended on the temperature and chlorine dioxide concentration used for delignification. Compared to conventional batch reactor, flow through reactor enhanced significantly the effective ClO2 efficiency toward non oxidized lignin. However, the loss of oxidizing power was considerable due to chlorate formation that restricted improvement of the global efficiency of chlorine dioxide.]]>Dence, C.W. and D.W. Reeve,19961st Edn.,Hamzeh, Y., G. Mortha, D. Lachenal, J.C. Hostachy and C. Calais,200626153164Hamzeh, Y., N. Benattar, G. Mortha and C. Calais,200760150155Lachenal, D. and C. Chirat,199953125130Lachenal, D. and C. Chirat,20002000Lachenal, D., Y. Hamzeh, C. Chirat and G. Mortha,20072007Li, Z., Y. Ni and A.R.P. van Heiningen,199697T292T295Lindgren, B.O. and T. Nilsson,1975786668Mortha, G., A. DAveni and M.A. Renaud,199044251262Mortha, G. and Y. Hamzeh,20032003Ni, Y., G.J. Kubes and A.R.P. Van Heiningen,199319J1J6Svenson, D.R., J.F. Kadla, H. Chang and H. Jameel,20024159275933Svenson, D.R., H.M. Chang, H. Jameel and J.F. Kadla,200559110115Svenson, D.R., H. Jameel, H.M. Chang and J.F. Kadla,200626201213Yoon, B.H., L.J. Wang, S.L. Yoon and S.J. Kim,200457472474Wartiovaara, I.,198264534545