reactive distillation

1. REACTIVE DISTILLATION
Presented By:
Jay Jawalge (11920039)
Rupali Kadam (11920081)
Karthik Iyer (11810069)
Payal Khandagale (11920014)
Arjun Phad (11920021) 1Group 7

2. Content
• Reactive Separation Technology
• What is Reactive Distillation?
• History of Reactive Distillation?
• Why reactive Distillation?
• Why not Reactive Distillation?
• Principle
• Hardware aspect
• Process alternative
• Case study
• Applications
• References
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3. Reactive Separation Technology
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Fig.1, Multi-functional reactor [5]
• Traditional flow sheet of a
chemical process consists of a
reactor.
• Development and application
of integrated processes.
• Better process economy.
• Multi-functional reactor.

4. What is Reactive Distillation?
• Chemical reaction and conventional distillation are integrated
• Example of process intensification
• Substantially smaller, cleaner, safer, and energy efficient technology
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5. History of Reactive Distillation
Homogeneously catalysed esterification
Heterogeneously catalysed process, methyl tert-butyl ether
(MTBE)
The intensified (Eastman-Kodak) process, Methyl Acetate
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1920
1978
1984

6. Continued…
Fig.2, Conventional (left) and intensified (right) methyl acetate synthesis processes. The conventional process consists of one reactor followed by eight distillation columns
and one extraction column. The intensified (Eastman-Kodak) process uses reactive distillation technology, Ref. [1].
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7. Example
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Fig. 3, Processing schemes for a reaction sequence where C and D are both desired products, [5]

8. Why Reactive Distillation?
Increased conversion
Increased selectivity
Reduced energy consumption
Overcoming of azeotropes
Simplified separation of close-boiling components
Capital savings
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9. Why NOT Reactive Distillation?
Volatility constraints
Operating-window constraints
Occurrence of reactive azeotropes
Occurrence of multiple steady states
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10. Principle
• Le chatelier’s principle
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11. • Semi-batch reactor • Reactive distillation
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Fig. 4 Semi-batch reactor, Ref. [3] Fig. 5 Reactive distillation, Ref. [3]
Continued…

12. Hardware Aspect
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Fig. 6, Non-catalytic column internals for Reactive distillation, Ref.[1]

13. Group 7 13Fig. 7, Non-catalytic column internals for Reactive distillation, Ref.[1]
Fig.6, Hybrid structure

14. Process alternative
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Fig.8, Equipment for Processes that Combine Reaction and Distillation Steps, Ref. destillation in der Prozesssynthese (Ph.D. thesis), TU Dortmund,1998

15. Case Study: A reactive distillation process for deep
hydrodesulphurization of diesel
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Fig. 9, Reactive distillation column configuration for ultra-low sulfur diesel
production
• equilibrium stage model
• H2 to hydrocarbon (HC) feed
ratio of 3.
under optimal design and operating conditions,
reactive distillation could be considered as a viable
technological alternative to produce ULSD.

16. Reactive Distillatory Unit: Video
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17. Applications of Reactive Distillation
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Table.1, Industrial applications of reactive distillation, Ref. [4]

18. References
[1] Keller, T. (2014). Reactive Distillation. Distillation, 261–294
[2] Reaction Distilation Unit by Goel Scientific Glass Works Ltd
[3] http://umich.edu/~elements/5e/web_mod/distill/index.htm
[4] Nguyen, Quy & Nguyen, Kim & Nguyen, Tuan-Anh & Tetsuo, Fuchino. (2020).
Overcome the equilibrium limitation in para-Xylene production by using reactive
distillation method
[5] Shah, Binoy & Shah, Parin. (2015). Reactive Distillation In Process Industries.
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19. Continued…
[6] D.W. Agar, Multifunctional reactors: old preconceptions and new
dimensions, Chem. Eng. Sci. 54 (1999) 1299e1305.
[7] B. Bessling, Zur Reaktivdestillation in der Prozesssynthese (Ph.D. thesis), TU
Dortmund, 1998.
[8] G. Schembecker, S. Tlatlik, Process synthesis for reactive separations,
Chem. Eng. Process. 42 (2003) 179e189.
[9] W. Song, R.S. Huss, M.F. Doherty, M.F. Malone, Discovery of a reactive
azeotrope, Nature 388 (1997) 561e563.
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20. Thank You
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