L'influence des paramètres opératoires sur la production et les propriétés du PEHD grade 5502 au niveau du CP2K
The main objective of this work is to analyze the influence of operational parameters on the properties of high-density polyethylene produced using the Philips process (PF) at the CP2K complex in Skikda, Algeria. For high-density polyethylene to meet requirements, it must have specific melt index and density values. The control of these properties, experimentally obtained on different grades of HDPE through measurement methods, is achieved by controlling other interdependent variables such as ethylene concentration, temperature, catalyst productivity, and hydrogen and hexene concentrations. A thorough understanding of these variables and their relationships is essential not only to ensure consistent product quality but also to ensure smooth operations and avoid issues such as reactor clogging and fouling. Keywords: Polymer, PHILIPS process (PF), HDPE, melt index, density and ethylene.
Récupération de l’éthylène non réagi au niveau du complexe CP2K-SONATRACH-SKIKDA
The CP2K complex produces high-density polyethylene (HDPE) from ethylene, with a conversion rate of 96%, resulting in the loss of approximately 927.6 kg/h of unreacted ethylene. To prevent this waste, a recovery solution was proposed and simulated using the ASPEN HYSYS software, incorporating a compressor and a column with a condenser and reboiler. This setup allows for the recovery of up to 97.9% of the unconverted ethylene. The techno-economic analysis confirms the profitability of this solution. Keywords: High-density polyethylene (HDPE), Column, Accumulator, Recovery, Ethylene.
Redimensionnement de la colonne d'absorption de CO2 de l'unité de fabrication d'ammoniac FERTIAL Annaba
This thesis aims to study and analyze the performance of the CO2 absorption column in the ammonia production unit at FERTIAL Annaba. A recent increase in CO2 concentration in the outlet gas has been observed, leading to overload of the methanation unit, higher operating temperatures, and potential risks to the equipment, in adition to a decrease in the unit’s overall efficiency. The operation of this column relies on the use of MEA (Monoethanolamine) solution as an absorbent solvent. While effective, MEA is corrosive and sensitive to impurities, which may cause various operational issues. The results showed that the current column, consisting of 20 theoretical plates, is insufficient. Several solutions were proposed, such as: Increasing the number of plates (to 22 or 23), Installing a new, more efficient column, Or splitting the load between two columns, each with 11 or 12 plates. This study highlights the importance of accurate equipment design and emphasizes the influence of MEA’s properties on the overall performance, requiring optimization of operating conditions to ensure safe and efficient industrial operation. Keywords: Ammonia, column, absorption, MEA (Monoethanolamine).
Redimensionnement de la colonne d'absorption de CO2 de l'unité de fabrication d'ammoniac FERTIAL Annaba
This thesis aims to study and analyze the performance of the CO2 absorption column in the ammonia production unit at FERTIAL Annaba. A recent increase in CO2 concentration in the outlet gas has been observed, leading to overload of the methanation unit, higher operating temperatures, and potential risks to the equipment, in adition to a decrease in the unit’s overall efficiency. The operation of this column relies on the use of MEA (Monoethanolamine) solution as an absorbent solvent. While effective, MEA is corrosive and sensitive to impurities, which may cause various operational issues. The results showed that the current column, consisting of 20 theoretical plates, is insufficient. Several solutions were proposed, such as: Increasing the number of plates (to 22 or 23), Installing a new, more efficient column, Or splitting the load between two columns, each with 11 or 12 plates. This study highlights the importance of accurate equipment design and emphasizes the influence of MEA’s properties on the overall performance, requiring optimization of operating conditions to ensure safe and efficient industrial operation. Keywords: Ammonia, column, absorption, MEA (Monoethanolamine).