{"product_id":"modelling-and-advanced-control-for-polyethylene-production-von-ahmmed-saadi-ibrahem","title":"MODELLING AND ADVANCED CONTROL FOR POLYETHYLENE PRODUCTION","description":"\u003cp\u003eA modified model for the gas-phase polymerization of  polyethylene in fluidized-bed catalyst reactors  (FBR) using Ziegler-Natta catalyst is presented in  this study. This mathematical model accounts for  mass and heat transfer between the bubbles and the  clouds without chemical reaction, between the clouds  and the emulsion without chemical reaction, and  between emulsion and solid with chemical reaction  that occurs at the surface of the catalyst  particles. The model also, accounts for the effect  of catalyst particles type for the rate of  adsorption,desorption and catalyst surface reaction  on the site of reaction. In this work, the  concentration and temperature profiles in the  bubble, cloud and emulsion phases are calculated.   The effect of important reactor parameters such as  superficial gas velocity, catalyst injection rate,  catalyst particle growth and minimum fluidization  velocity on the dynamic behavior of the FBR is  investigated.\u003c\/p\u003e\u003cdiv class=\"aw-variant-hidden-subtitle-div\" id=\"aw-variant-subtitle-9783843366151\"\u003e\u003ch3\u003eIN A FLUYIDIZED-BED CATALYTIC REACTOR\u003c\/h3\u003e\u003c\/div\u003e","brand":"Autorenwelt Shop","offers":[{"title":"Softcover - 9783843366151","offer_id":39470032748637,"sku":"9783843366151","price":79.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0940\/0622\/files\/f76678c7-d750-476c-9370-1a7d69ae668f.jpg?v=1757909495","url":"https:\/\/shop.autorenwelt.de\/products\/modelling-and-advanced-control-for-polyethylene-production-von-ahmmed-saadi-ibrahem","provider":"Autorenwelt Shop","version":"1.0","type":"link"}