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Activity & Stability of [Emim] 2 ZnBr 2 Cl 2 & [Bu 4 N] 2 ZnBr 2 Cl 2 Catalysts due to Weight Ratio of Substrate/Catalyst & Temperature Variations Ethylene.

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Presentation on theme: "Activity & Stability of [Emim] 2 ZnBr 2 Cl 2 & [Bu 4 N] 2 ZnBr 2 Cl 2 Catalysts due to Weight Ratio of Substrate/Catalyst & Temperature Variations Ethylene."— Presentation transcript:

1 Activity & Stability of [Emim] 2 ZnBr 2 Cl 2 & [Bu 4 N] 2 ZnBr 2 Cl 2 Catalysts due to Weight Ratio of Substrate/Catalyst & Temperature Variations Ethylene Carbonate Synthesis by Coupling Reaction of Ethylene Oxide & Carbon Dioxide in the presence of Ionic Liquids Based Catalysts Presented by: Jelliarko P. Green & Sustainable Chemistry Lab

2 Introduction O O O O C O O T Cat + P Coupling Reaction in ethylene carbonate production What is coupling reaction of ethylene oxide and carbon dioxide ? Advantage - One step reaction. - No solvent is required except the product itself. - High molar substrate/catalyst ratio. - Simple distillation in product separation A Progress Report A Progress Report A Progress Report A progress Report A Progress Report

3 NN CH 3 CH ZnBr 2 Cl 2 [Emim] 2 ZnBr 2 Cl 2 [Bu 4 N] 2 ZnBr 2 Cl 2 Introduction Transition metal-Ionic Liquids Catalysts A Progress Report A Progress Report A Progress Report A Progress Report A progress Report N + CH 3 CH 3 CH 3 CH 3 2 ZnBr 2 Cl 2

4 Objective A Progress Report A Progress Report A Progress Report A progress Report Objective A Progress Report 1.Investigating decomposition of ethylene carbonate alone under vacuum and high temperature. 2.Investigating decomposition of ethylene carbonate in the presence of catalyst under vacuum and high temperature. 3.Investigating activity and stability of catalysts in multiple coupling reactions.

5 Experiments A Progress Report A Progress Report A Progress Report A progress Report A Progress Report 1. Investigating Decomposition of Ethylene Carbonate Alone The reactor was charged with an appropriate amount of EC and was fully vacuumed. Then, temperature was increased step by step to specific value (100 – 170 o C) After cooling, the mixture was weighted and was taken for GC-MS analysis 2. Investigating Decomposition of EC in the Presence of Catalyst The reactor was charge with an appropriate amount of EC and catalyst and was fully vacuumed. Then, temperature was increased step by step to specific value (100 – 170 o C) After cooling, the mixture was weighted and was taken for GC-MS analysis

6 Experiments A Progress Report A Progress Report A Progress Report A progress Report A Progress Report 3. Investigating activity and stability of catalysts in multiple coupling reactions [Bu 4 N] 2 ZnBr 2 Cl 2 catalyst 0.5 gr of catalyst (1.50 %wt) was loaded into 200 mL stainless-steel bomb reactor. 50 gr of EC acted as solvent was also put in. Then, the reactor was charged with 33.6 gr of ethylene oxide. The bomb then was pressurized with CO 2 and heated to specific reaction temperature (100 o C), with the addition of CO 2 from a reservoir tank to maintain a constant pressure. After cooling the reactor, the mixture was weighted and was transferred into distillation apparatus for separation process. The above procedure was repeated 6 times.

7 Experiments A Progress Report A Progress Report A Progress Report A progress Report A Progress Report 4. Investigating activity and stability of catalysts in multiple coupling reactions 200 mL stainless-steel bomb reactor was charged with an appropriate amount of catalyst and EC acted as solvent. Then, the reactor was charged with ethylene oxide. The bomb was pressurized with CO 2 and heated to specific reaction temperature with the addition of CO 2 from a reservoir tank to maintain a constant pressure. After cooling the reactor, the mixture was purged with nitrogen to remove dissolved CO 2 and EO. The reactor and its content were weighted and the second reaction was performed. Experiments

8 A Progress Report A Progress Report A Progress Report A progress Report A Progress Report Decomposition Apparatus Go to Vacuum Condenser Temperature Transducer Reactor Electrical Heater Pressure Transducer

9 A Progress Report A Progress Report A Progress Report A progress Report A Progress Report Coupling Reaction Apparatus Experiments Reactor EO Reservoir CO 2 Reservoir CO 2 Tank N 2 Tank Magnetic Stirrer Electrical Heater Temperature Transducer

10 Preliminary study showed that decomposition occurred at high reaction temperature. Decomposition of EC into EO and CO 2 was observed from pressure increase and weight loss Result & Discussion A Progress Report A Progress Report A Progress Report A progress Report A Progress Report EC Properties: m.p. 37 – 39 o C b.p. 243 – 244 o C/740 mmHg 169 o C/100 mmHg 147 o C/50 mmHg

11 A Progress Report A Progress Report A Progress Report A progress Report A Progress Report Result & Discussion 1.50 wt% of [Bu 4 N]ZnBr 2 Cl 2 showed high activity and stability over six times coupling reactions (100 0 C, 500 psig of press. and 1 h reaction time), and separation processes by reduced pressure distillation. CO 2 Consumption

12 Result & Discussion A Progress Report A Progress Report A Progress Report A progress Report A Progress Report Reaction Condition : * CO 2 Press. 500 Psig. * EC solvent gr [Emim] 2 ZnBr 2 Cl 2 Multiple reactions, 1 st and 2 nd. All product mixtures were solid white except for 170 o C reaction temperature were slightly yellowish.

13 Result & Discussion A Progress Report A Progress Report A Progress Report A progress Report A Progress Report [Bu 4 N] 2 ZnBr 2 Cl 2 Reaction Condition : * CO 2 Press. 500 Psig. * EC solvent gr Multiple reactions, 1 st and 2 nd. A portion was taken from decomposition test at 150 o C. All product mixtures were solid white.

14 Result A Progress Report A Progress Report A Progress Report A progress Report A Progress Report & Discussion [Emim] 2 ZnBr 2 Cl 2 Wt% Ratio Activity Reaction Temp. Activity

15 A Progress Report A Progress Report A Progress Report A progress Report A Progress Report Result & Discussion [Bu 4 N] 2 ZnBr 2 Cl 2 Wt% Ratio Activity Reaction Temp. Activity Result & Discussion

16 cHRistmAs CoNcLuSion & Plans A Progress Report A Progress Report A Progress Report A progress Report A Progress Report Plans Finding tune the weight ratio of catalysts over EO that will give the most economical value. Recycling coupling reaction test. Conclusion Moderate EC decomposition occurred at high temperature and severe decomposition occurred in the presence of catalysts wt% of catalyst ratio showed high durability over multiple coupling reaction and separation processes. ([Bu 4 N] 2 ZnBr 2 Cl 2 – study case). Above 140 o C, [Emim] 2 ZnBr 2 Cl 2 showed reduced activity as wt% decreased. However, the activity increased as reaction temperature was raised. Above 120 o C, [Bu 4 N] 2 ZnBr 2 Cl 2 showed reduced activity as wt% decreased. However, the activity increased as reaction temperature was raised.

17 Ho …..ho ….ho …. Dear all ….. Happy Christmas & Merry New Year !!! Be cool & Enjoy your works But I will have long vacation ho ….ho … ho.. Saint Claus says………


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