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  3. Modeling, simulation and optimization of Jam petrochemical trickle bed reactor for hydrogenation of 1 and 3-butadiene

Modeling, simulation and optimization of Jam petrochemical trickle bed reactor for hydrogenation of 1 and 3-butadiene

Number of pages: 91 File Format: word File Code: 31762
Year: 2014 University Degree: Master's degree Category: Chemical - Petrochemical Engineering
Tags/Keywords: butadiene - Hydrogenation - Kinetic model - Mathematical modeling - Modeling - Reactor optimization - Simulation - The bed of petrochemical checks
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  • Summary of Modeling, simulation and optimization of Jam petrochemical trickle bed reactor for hydrogenation of 1 and 3-butadiene

    Master's Thesis in the field

    Chemical Engineering without orientation

    Abstract

     

    Modeling, simulation and optimization of the petrochemical check bed reactor for hydrogenation of 1-3-butadiene

     

    This article examines an industrial hydrogenation butadiene droplet bed reactor. Therefore, a suitable kinetic model has been selected as a basic structure for modeling the reactor, and after that the presented model has been developed in order to match the molar balance of industrial data. Also, many efforts were made in order to create an accurate and at the same time simple mathematical model, and the modeling results were compared with the outputs of the industrial unit. Finally, the results were able to cover the industrial data well with a total relative error of 0.1. In addition, the behavior of various parameters such as temperature and molar flow intensity during the reactor was studied. Apart from that, the effect of inlet temperature on the behavior of trickle bed reactor was studied. In the end, the efficiency of the three-phase trickle bed reactor was investigated under different operational conditions of the input fluid. Keywords: trickle bed reactor, butadiene hydrogenation, mathematical modeling, kinetic model 1 Introduction 1-1 Introduction of Jam Petrochemical Complex rtl;">       The petrochemical industry in Iran has undergone many developments and transformations. Developments that gradually turn this huge industry into the first industry of the country. The petrochemical industry has a special position as one of the sources of meeting the needs of many domestic industries, exporting and producing its own products and an important source of foreign exchange and job creation for the country. Therefore, within the framework of the country's third economic development program, petrochemical projects are planned in the South Pars Energy Special Economic Zone. The plan of the 10th Olefin Complex (Jam Petrochemical) is one of the plans of the strategic plan for the development of the country's petrochemical industries.

    This complex, which is located in the South Pars Energy Special Economic Zone, includes olefin units, linear light polyethylene, heavy polyethylene, polypropylene each with a capacity of 300 thousand tons per year, monoethylene glycol unit with a capacity of 400 thousand tons per year and di-triethylene. Glycol is a total of 43,000 tons per year.

    In addition, Alpha Olefin units with a capacity of 200,000 tons and Butadiene unit with a capacity of 130,000 tons per year are the other units of this complex. It is the largest olefin unit in the world. This unit, which is also known as the cracking unit, consists of different parts, which include:

    Cracking furnaces

    Hot part

    Gas compressor, washing with caustic and drying

    Ethylene recovery and demethane

    Separation of two-carbon cut

    Separation of three-carbon cut

    Separation of four-carbon cut

    Refrigeration systems

    Auxiliary systems

    Product tanks

    The unit feed is prepared from different parts, which is sent to the unit through several pipelines, which are divided into three categories:

    Liquid feed consists of five lines including:

    Raffinite [1] cut C5 from the fourth aromatic complex at a temperature of 45 degrees Celsius and a pressure of 6 bar

    C5+ from the 9th olefin complex at a temperature of 50 degrees Celsius and a minimum pressure of 11 bar

    LPG [2] from the fourth aromatic at a temperature of 45 degrees Celsius and a pressure of 16 bars

    Two ethane lines, one is fresh ethane from Pars Petrochemical (ethane extraction unit) and the other is from phases 4 and 5 which is under the gas phase. This feed It is sent to gas furnaces.The desired temperature is 35 degrees Celsius and the minimum pressure is about 17 bar. The desired temperature is 45 degrees Celsius and the minimum pressure is 16 bar.

    The liquid feed from Aromatic Four is mixed together and sent to the liquid feed storage container. This mixture is pumped to the liquid feed preheater and then sent to the furnaces after being mixed with return propane, four-carbon cuts and LPG.

    MODELING AND SIMULATION OF AN INDUSTRIAL THREE PHASE TRICKLE BED REACTOR RESPONSIBLE FOR HYDROGENATION OF 1,3-BUTADIENE; A CASE STUDY IN JAM PETROCHEMICAL COMPLEX

     

    BY

    TAHERE TOHIDIAN

     

    In this research, an industrial trickle bed reactor responsible for the hydrogenation of 1,3-butadiene into n-butane has been chosen as a case study. In this regard, a suitable reaction network has been applied as the base kinetic structure, and then it has been developed further to a more detailed reaction scheme capable of predicting available plant data. As the next step, attempts have been made to establish an accurate and simple to use mathematical modeling with the ultimate goal of predicting the plant outputs. The results ascertained the success of the proposed modeling in terms of total relative error of about 0.1. Moreover, the behavior of different parameters including temperature and molar flow rates along the length of the reactor has been studied. Additionally, the effect of inlet temperature on the behavior of the understudied trickle bed reactor has been seriously investigated. Finally, the performance of the three phase catalytic reactor has been studied under different operating conditions of the flowing feed stream.

  • Contents & References of Modeling, simulation and optimization of Jam petrochemical trickle bed reactor for hydrogenation of 1 and 3-butadiene

    List:

    1-1 Introduction to Jam Petrochemical Complex 2

    1-1-1 Cracking Unit 6

    1-1-2 Hot Section 8

    1-1-3 Compressor 9

    1-1-4 Demethane 12

    1-1-5 Ethane 13

    1-1-6 Separation of three-carbon cut 13

    1-1-7 Separation of four-carbon cut 14

    1-2 Introduction to Czech bed reactors 18

    1-2-1 Comparison with other three-phase reactors 22

    2-1 Review of research In the context of modeling the check bed reactor 31

    2-2 Review of research conducted in the field of butadiene hydrogenation kinetics 33

    3-1 Description of the mathematical model 37

    3-1-1 Mass transfer steps and governing assumptions 37

    3-1-2 Mass and energy equations 39

    3-2 Physical properties 40

    3-3 kinetic equations 43

    3-3-1 catalyst 45

    3-4 numerical solution and optimization method 46

    4-1 evaluation of the model 49

    4-2 results 51

    4-2-1 temperature profile along the reactor 55

    4-2-2 Molar flow intensity distribution of components in the liquid phase 56

    4-2-3 Distribution of gas phase hydrogen molar flow intensity along the reactor 62

    4-2-4 Distribution of physical characteristics along the reactor 63

    4-2-5 Examining the effects of changing inlet temperature 65

    4-2-6 Changes in conversion percentage and efficiency Influenced by the temperature and intensity of the incoming current 68

    5 Conclusion and suggestions 70

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Modeling, simulation and optimization of Jam petrochemical trickle bed reactor for hydrogenation of 1 and 3-butadiene
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