production of methyl tertiary butyl ether (mtbe)

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  1. 1. Kurdistan Regional Government Ministry of Higher Education and Scientific Research Koya University Faculty of Engineering Chemical Engineering Department Author: Alan Mawlud Amin Aree Salah Tahir Supervisor: Abdul Majid Osman 2015 - 2016 A project submitted in partial fulfilment of the requirements for the degree of bachelor in science in Chemical engineering at Koya University PRODUCTION OF METHYL TERTIARY BUTYL ETHER (MTBE)
  2. 2. PRODUCTION OF METHYL TERTIARY BUTYL ETHER (MTBE) IABSTRACT ABSTRACT Methyl tertiary butyl ether (MTBE) is primarily used in gasoline blending as an octane enhancer to improve hydrocarbon combustion efficiency. Of all the Oxygenates, MTBE is the most attractive for a variety of technical reasons. It has a low vapor pressure. It can be blended with other fuels without phase separation. It has the desirable octane characteristics. MTBE is produced via direct addition methanol to isobutylene using ion exchange resin as a catalyst. In order to improve the quality of the gasoline produced in the Kurdistan refineries, this project studies the implantation of an MTBE plant with a capacity that suffices the production rate of Kurdistan gasoline. The project based on conducting material and energy balances, designing reaction and distillation equipment According to this study, it is possible to obtain an overall conversion of around 80% with a purity of MTBE that reaches 95% and a payback period (PBP) that is estimated to be 3.7 years. Keywords: Production of MTBE, material balance, energy balance, process design.
  3. 3. PRODUCTION OF METHYL TERTIARY BUTYL ETHER (MTBE) IITABLE OF CONTENTS 1. TABLE OF CONTENTS I. CHAPTER ONE: INTRODUCTION .................................. 1 Methyl tertiary butyl ether (MTBE).............................................................................11.1. History of MTBE...........................................................................................................21.2. Importance and applications of MTBE........................................................................31.3. Properties (chemical and physical) .............................................................................41.4. 1.5 World market demand................................................................................................5. Objectives of this project ............................................................................................61.6. II. CHAPTER TWO: MTBE PRODUCTION........................... 7 Introduction.................................................................................................................72.1. Process Description.....................................................................................................82.2. 2.2.1. Possibility of Changing Process Feed Conditions ....................................................9 Process Details ..........................................................................................................112.3. 2.3.1. Equipment .............................................................................................................11 III. CHAPTER THREE: MATERIAL BALANCE...................... 20 Introduction: .............................................................................................................203.1. Calculations: ..............................................................................................................213.2. 3.2.1. Over all material balance:......................................................................................21 3.2.2. Material balance around reactor(R-901):..............................................................22 3.2.3. Material balance around distillation column (T-901):...........................................24 3.2.4. Material balance around methanol absorber (T-902):..........................................25 3.2.5. Material balance around tower (T-903):...............................................................26 IV. CHAPTER FOUR: ENERGY BALANCE .......................... 28 Introduction: .............................................................................................................284.1. Conservation of energy:............................................................................................284.2. Energy balance calculations:.....................................................................................294.3. 4.3.1. Heat capacity equation for ideal gases: ................................................................29 4.3.2. Heat capacity constant for liquid: .........................................................................30 4.3.3. Energy balance around summing point: ...............................................................30
  4. 4. PRODUCTION OF METHYL TERTIARY BUTYL ETHER (MTBE) IIITABLE OF CONTENTS 4.3.4. Energy balance around heat exchanger (E901): ...................................................32 4.3.5. Energy balance around reactor (R901):.................................................................34 4.3.6. Energy balance around distillation column (T901): ..............................................36 4.3.7. Energy balance around methanol absorber (T902): .............................................39 V. CHAPTER FIVE: DESIGN................................. 44 Distillation design:.....................................................................................................445.1. 5.1.1. Introduction:..........................................................................................................44 5.1.2. Collect the data of fluid to be distillated and distillated.......................................45 5.1.3. Heavy and light key:...............................................................................................46 5.1.4. Type of tray:...........................................................................................................46 5.1.5. Determination of minimum reflux ratio:...............................................................47 5.1.6. Calculation of the actual ratio(R)...........................................................................48 5.1.7. Calculation of the minimum number of theoretical stages: .................................48 5.1.8. Calculation of the number of theoretical stages:..................................................48 5.1.9. Calculation of the column efficiency (E): .............................................................49 5.1.10. Calculation of the number of actual stages (Na):..............................................49 5.1.11. Calculation of the height of the column (Ht):....................................................49 5.1.12. Determination of the feed plate location (m): ..................................................49 5.1.13. Calculation of the tower diameter(D):...............................................................50 5.1.14. Determination of fractional entrainment ():...................................................53 5.1.15. Weeping point: ..................................................................................................53 5.1.16. Pressure drop calculation: .................................................................................54 5.1.17. Down comer liquid back up: ..............................................................................55 5.1.18. Down comer residence time:.............................................................................56 VI. CHAPTER SIX: CONCLUSION & RECOMMENDATIONS............................... 58 Conclusion:................................................................................................................586.1. Recommendations: ...................................................................................................586.2. VII. 7. ............................................................... REFERENCES 59
  5. 5. PRODUCTION OF METHYL TERTIARY BUTYL ETHER (MTBE) IVTABLE OF CONTENTS LIST OF FIGURES Figure 1 Global MTBE Demand by Region (2014) .......................................................................... 6 Figure 2 MTBE Production Facility................................................................................................ 10 LIST OF TABLES Table 1 Properties of MTBE ............................................................................................................ 4 Table 2 MTBE competitive strengths and weaknesses .................................................................. 5 Table 3 Stream Tables for Unit 900 .............................................................................................. 14 Table 4 Utility Stream Flow Summary for Unit 900...................................................................... 17 Table 5 Partial Equipment Summary............................................................................................ 18 Table 6 Reactors and Vessels........................................................................................................ 18 Table 7 Pumps............................................................................................................................... 18 Table 8 Towers.............................................................................................................................. 19 Table 9 Summary of material balance calculation by using Excel sheet..................................... 27 Table 10 Heat capacity constants for ideal gases......................................................................... 29 Table 11 Heat capacity constants for liquid. ................................................................................ 30 Table 12 summarizes the results: bubble point calculation of stream 15. .................................. 31 Table 13 Ratio of component (i) in the feed to isobutylene feed. ......................................

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